DC contactor amperage guide hub
Find the DC contactor guide that matches your continuous current class.
Explore 20A to 1000A selection guides plus 48V and 72V application notes. Start with continuous current, duty cycle and coil requirements before RFQ.
Explore our guide clusters
DC contactor guides organized by current class
Use the clusters below to jump to the right ampere guide. Final fit depends on verified CZW, SZJ or MZJ series parameters and your enclosure data.
Guide cluster
20A to 150A Guides
Lower-current branch, control and early commercial selection paths.
Explore guides
Guide cluster
200A to 400A Guides
Mid-range distribution, motor branch and panel-builder current classes.
Explore guides
Guide cluster
500A to 1000A & Traction Voltage Guides
Heavy DC paths plus 48V and 72V traction application notes.
Explore guidesExplore the range
20A to 150A Guides
Lower-current branch, control and early commercial selection paths.
Explore the range
200A to 400A Guides
Mid-range distribution, motor branch and panel-builder current classes.
Explore the range
500A to 1000A & Traction Voltage Guides
Heavy DC paths plus 48V and 72V traction application notes.
Related product series
Product lines referenced in this guide hub
Move from guide reading to series-level RFQ once voltage class, current and coil requirements are defined.
Product family
Серия CZW Контактор DC
Compare published specifications and send RFQ data for model-level confirmation.
View series
Product family
Серия SZJ Контактор постоянного тока
Compare published specifications and send RFQ data for model-level confirmation.
View series
Product family
Контактор постоянного тока серии MZJ
Compare published specifications and send RFQ data for model-level confirmation.
View seriesSelection support
Match continuous current and duty before choosing a series.
Current-class selection changes with thermal duty, voltage headroom, coil supply, auxiliary feedback and mechanical outline. Share these inputs with the guide and series you are evaluating.
Need help narrowing the selection?
Send the application data and existing model information you have. We will use it to determine the next product and documentation review steps.
DC Contactor by Amperage FAQ
Selection questions
Which 100A guide should I read first?
Start with 100A DC Contactor Selection Guide as the primary commercial article.
How do 48V and 72V guides relate to amperage guides?
Use amperage guides for continuous current class; use 48V/72V guides when traction system voltage defines the application.
When should I move from 400A to 1000A guides?
When continuous current, duty or fault evidence exceeds mid-range published bounds on the SKU pages.
DRAFT PREVIEW — layout sample only; not published or indexed.
