{"id":2720,"date":"2026-08-05T01:50:00","date_gmt":"2026-08-04T17:50:00","guid":{"rendered":"https:\/\/sayoon-dc.com\/blog\/marine-dc-contactor-corrosion-voltage-class-considerations\/"},"modified":"2026-08-05T02:02:03","modified_gmt":"2026-08-04T18:02:03","slug":"marine-dc-contactor-corrosion-voltage-class-considerations","status":"publish","type":"post","link":"https:\/\/sayoon-dc.com\/fr\/blog\/marine-dc-contactor-corrosion-voltage-class-considerations\/","title":{"rendered":"How should marine teams check a DC contactor before RFQ release?"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>A marine DC contactor should be shortlisted only after the team separates maximum contact voltage from coil supply, documents the installed exposure and terminal strategy, and requests evidence for every corrosion or approval requirement. Neither a marine application page nor an ingress phrase proves vessel-class acceptance or a salt-spray duration.<\/strong><\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">For application context, review <a href=\"https:\/\/sayoon-dc.com\/fr\/solutions\/marine-shipbuilding\/\">marine shipbuilding DC contactor applications<\/a>. This guide is an engineering and RFQ checklist, not a statement that a particular SAYOON part is approved for a vessel.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"HEV50 DC contactor product view for marine DC contactor selection review\" src=\"https:\/\/sayoon-dc.com\/wp-content\/uploads\/2026\/05\/hev50ad_s3-1-2.webp\" \/><\/figure>\n<nav class=\"b2b-toc\" style=\"background:#f5f8fa;padding:16px 20px;border-radius:8px;margin:0 0 24px\">\n<h2 id=\"contents\" style=\"margin:42px 0 14px;scroll-margin-top:96px\">Contenu<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"#part-1-what-does-a-marine-dc-contactor-decision-actually-cover\">Part 1. What does a marine DC contactor decision actually cover?<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-2-where-should-corrosion-exposure-be-checked-before-component-selection\">Part 2. Where should corrosion exposure be checked before component selection?<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-3-why-must-contact-voltage-and-coil-supply-be-reviewed-separately\">Part 3. Why must contact voltage and coil supply be reviewed separately?<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-4-which-enclosure-and-ingress-claims-require-separate-evidence\">Part 4. Which enclosure and ingress claims require separate evidence?<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-5-how-do-class-and-customer-requirements-change-the-review-path\">Part 5. How do class and customer requirements change the review path?<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-6-which-rfq-fields-make-a-marine-dc-contactor-comparison-reviewable\">Part 6. Which RFQ fields make a marine DC contactor comparison reviewable?<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-7-which-claims-should-a-marine-team-refuse-to-infer\">Part 7. Which claims should a marine team refuse to infer?<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-1-what-does-a-marine-dc-contactor-decision-actually-cover\">Part 1. What does a marine DC contactor decision actually cover?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">A <strong>marine DC contactor<\/strong> is a DC switching component assessed for a defined shipboard or marine-adjacent path. The decision begins with the circuit role, but it cannot end with an ampere label: exposure, contact voltage, coil control, terminals, service access, and contract evidence all affect fit.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Review layer<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Question to answer<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Decision owner<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Circuit<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">What maximum DC voltage and continuous duty reach the contacts?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">G\u00e9nie \u00e9lectrique<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Control<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">What coil supply and command logic are installed?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ing\u00e9nierie des commandes<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Environnement<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">What moisture, salt, cleaning, and condensation reach the location?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Vessel \/ enclosure engineering<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Evidence<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">What document is required for the project?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Quality and procurement<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Use the <a href=\"https:\/\/sayoon-dc.com\/fr\/blog\/high-voltage-dc-contactor-oem-specification-fields-buyers-verify\/\">HV contactor specification audit<\/a> alongside this checklist when a project has several candidate models.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-2-where-should-corrosion-exposure-be-checked-before-component-selection\">Part 2. Where should corrosion exposure be checked before component selection?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Corrosion risk is a system question. A contactor can be inside a cabinet while terminals, cable entries, fasteners, and drain paths experience a different exposure. Record the installation zone before requesting a model recommendation.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Exposure observation<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">What to document<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Why it matters<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Salt-laden air or spray<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Location and expected exposure route<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Helps define evidence needed for terminals and enclosure<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Condensation cycles<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Venting, drains, and cold surfaces<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Prevents a sealed-component assumption from masking cabinet moisture<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Wash-down or cleaning<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Fluid, direction, frequency, and access panels<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Separates a procedure requirement from a generic ingress phrase<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Service access<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Inspection interval and replacement method<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Supports maintainability planning<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>Important :<\/strong> A corrosion-resistant description is not equivalent to a project test result. The <a href=\"https:\/\/www.ampp.org\/resources\" rel=\"nofollow noopener\" target=\"_blank\">AMPP resource library<\/a> is useful for corrosion terminology; it does not certify a SAYOON product or replace the vessel programme\u2019s specified evidence.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-3-why-must-contact-voltage-and-coil-supply-be-reviewed-separately\">Part 3. Why must contact voltage and coil supply be reviewed separately?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">The contact path and the coil control circuit answer different questions. Contact voltage describes the DC path the switching contacts must withstand. Coil supply describes the voltage used to energize the actuator. A coil value must never be copied into the contact-voltage field.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"HEV100 DC contactor gallery view for separate contact-voltage and coil-supply checks\" src=\"https:\/\/sayoon-dc.com\/wp-content\/uploads\/2026\/05\/hev100ad_s4-1-2.webp\" \/><\/figure>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Champ<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Belongs to<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Common error<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">RFQ action<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Maximum working DC voltage<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Main contacts<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Listing nominal source voltage only<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">State the maximum operating value<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Continuous current and duty<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Main contacts<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Treating interruption information as carry duty<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Provide load profile<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tension nominale de la bobine<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Control circuit<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Treating coil voltage as contact class<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">State supply tolerance and command method<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Auxiliary contact need<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Feedback circuit<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Assuming feedback is included<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Identify monitoring logic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Le <a href=\"https:\/\/sayoon-dc.com\/fr\/blog\/epoxy-resin-high-voltage-contactor-marine-ev-use-cases\/\">epoxy-sealed HV contactor use-case guide<\/a> explains why environmental language and electrical ratings must remain separate decisions.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-4-which-enclosure-and-ingress-claims-require-separate-evidence\">Part 4. Which enclosure and ingress claims require separate evidence?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ingress protection, enclosure construction, corrosion exposure, and marine approval are separate evidence categories. An IP value\u2014when published for a particular item\u2014addresses a defined ingress test; it does not automatically establish salt-spray duration, terminal corrosion performance, vessel acceptance, or a classification approval.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Evidence requested<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Supports<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Does not by itself support<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">SKU datasheet<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Published electrical and construction fields<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Unpublished environmental performance<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">IP test statement<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Defined ingress scope for the cited SKU<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Corrosion or class approval<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Material or coating record<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Identified material scope<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Whole-vessel approval<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Project test report<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Specific agreed test<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Transfer to another programme<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Keep any requested corrosion test method, duration, acceptance criterion, and sample configuration on the RFQ. Do not replace those lines with a general \u201cmarine grade\u201d label.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-5-how-do-class-and-customer-requirements-change-the-review-path\">Part 5. How do class and customer requirements change the review path?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ship projects can introduce class-society, flag-state, owner, yard, or customer requirements. Those rules apply in a project context. Whether a component requires a particular document depends on the circuit, installation, vessel scope, and contract\u2014not merely the product family name.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Requirement source<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Ask before nomination<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Result<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Classification body<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Is a named certificate or witness test required?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Traceable document request<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Shipyard<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Is there an approved-vendor or drawing process?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Procurement route<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Owner specification<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Are corrosion, maintenance, or redundancy criteria listed?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Design input<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">System integrator<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">What interface and feedback constraints exist?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Electrical integration review<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Le <a href=\"https:\/\/www.iec.ch\/dyn\/www\/f?p=103:7:0::::FSP_ORG_ID,FSP_LANG_ID:1273,25\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60092 overview<\/a> provides shipboard electrical-installation context. It is not a basis for claiming compliance by a contactor without the applicable project evidence.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-6-which-rfq-fields-make-a-marine-dc-contactor-comparison-reviewable\">Part 6. Which RFQ fields make a marine DC contactor comparison reviewable?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">A useful RFQ lets engineering, quality, and procurement evaluate the same facts. Start with the public <a href=\"https:\/\/sayoon-dc.com\/fr\/hev-series-hv-dc-contactor\/\">HEV Series HV DC Contactor information<\/a>, then compare only published model fields against the project record.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"HEV100 DC contactor product image for marine RFQ evidence review\" src=\"https:\/\/sayoon-dc.com\/wp-content\/uploads\/2026\/05\/hev100ad_s2-2-2.webp\" \/><\/figure>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">RFQ field<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Buyer should provide<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Supplier should document<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Circuit role<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Disconnect, precharge, branch, or other defined role<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Suitable published model fields<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tension de contact maximale<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Maximum operating DC value<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Published contact-voltage field<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Current and duty<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Continuous current, cycles, and switching scenario<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Published carry \/ switching information where listed<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Coil and feedback<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Coil supply, tolerance, and auxiliary requirement<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Published coil and auxiliary options<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Exposure<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Salt, condensation, wash-down, and enclosure description<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Evidence available for the specific request<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Project approvals<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Named certificate or test requirement<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Certificate scope or an explicit gap<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>Ajuster la limite :<\/strong> This checklist can organize a request for a SAYOON DC contactor. It cannot approve the vessel design, prove an unlisted salt-spray result, or imply class-society acceptance. <a href=\"https:\/\/sayoon-dc.com\/fr\/contactez-nous\/\">Contact SAYOON<\/a> with the complete project inputs when a model-specific review is needed.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-7-which-claims-should-a-marine-team-refuse-to-infer\">Part 7. Which claims should a marine team refuse to infer?<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Avoid short cuts that turn a component description into an unsupported marine claim.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Do not infer<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Why it is unsafe<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Better action<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u201cIP-rated means corrosion-proof\u201d<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ingress and corrosion evidence are different<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Request the relevant environmental evidence<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u201cMarine application means class-approved\u201d<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Application context is not certificate scope<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Name the required certificate<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u201cCoil voltage proves contact class\u201d<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Control and power paths are different<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Record both fields<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u201cOne model serves every vessel path\u201d<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Duty and enclosure conditions vary<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Review each circuit role<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Hold BOM release whenever a required document, voltage value, or exposure condition remains blank. That protects the vessel programme from an assumption that cannot be traced to evidence.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"references\">R\u00e9f\u00e9rences<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.dnv.com\/maritime\/\" rel=\"nofollow noopener\" target=\"_blank\">DNV Maritime<\/a> \u2014 project and classification context<\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.ampp.org\/resources\" rel=\"nofollow noopener\" target=\"_blank\">AMPP corrosion resources<\/a> \u2014 corrosion terminology and prevention context<\/li>\n<\/ul>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"faqs\">FAQ<\/h2>\n<h3 style=\"margin:28px 0 12px\">What is a marine DC contactor?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">It is a DC switching component considered for a defined marine electrical path. Selection should include electrical duty, coil control, exposure, terminals, service access, and the project\u2019s evidence requirements.<\/p>\n<h3 style=\"margin:28px 0 12px\">Does a marine DC contactor need a salt-spray rating?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Only the vessel specification or installation environment can determine that requirement. If it is required, put the test method, duration, configuration, and acceptance criteria on the RFQ rather than assuming a rating.<\/p>\n<h3 style=\"margin:28px 0 12px\">How does contact voltage differ from coil voltage?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Contact voltage applies to the DC power path the contacts handle. Coil voltage applies to the control circuit that actuates the contactor; it cannot be substituted for the main-path voltage class.<\/p>\n<h3 style=\"margin:28px 0 12px\">Can an IP rating prove marine suitability?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">No. An IP rating applies to a defined ingress test for the stated item. It does not, by itself, prove corrosion performance, salt-spray duration, vessel integration, or class approval.<\/p>\n<h3 style=\"margin:28px 0 12px\">What belongs in a marine contactor RFQ?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Include circuit role, maximum contact voltage, current and duty, coil supply, auxiliary needs, enclosure exposure, terminal strategy, and every required project certificate or test.<\/p>\n<h3 style=\"margin:28px 0 12px\">Do all contactors include marine-class approval?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">No. Do not make that assumption from a series name or application page. Ask for the named certificate and verify its scope against the project requirement.<\/p>\n<h3 style=\"margin:28px 0 12px\">When should a project hold the BOM for review?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Hold the BOM when the maximum voltage, exposure definition, electrical duty, or required certificate is not documented. Releasing a part with those gaps transfers an engineering decision into an unverified purchasing assumption.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A marine DC contactor should be shortlisted only after the team separates maximum contact voltage from coil supply, documents the installed exposure and terminal strategy, and requests evidence for every corrosion or approval requirement. Neither a marine application page nor an ingress phrase proves vessel-class acceptance or a salt-spray duration. For application context, review marine [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1383,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2720","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"_links":{"self":[{"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/posts\/2720","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/comments?post=2720"}],"version-history":[{"count":1,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/posts\/2720\/revisions"}],"predecessor-version":[{"id":2722,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/posts\/2720\/revisions\/2722"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/media\/1383"}],"wp:attachment":[{"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/media?parent=2720"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/categories?post=2720"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sayoon-dc.com\/fr\/wp-json\/wp\/v2\/tags?post=2720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}