{"id":1454,"date":"2026-05-08T11:53:19","date_gmt":"2026-05-08T03:53:19","guid":{"rendered":"https:\/\/sayoon-dc.com\/?post_type=product&p=1454"},"modified":"2026-07-16T10:30:42","modified_gmt":"2026-07-16T02:30:42","slug":"qzjb50a-d-normally-closed-dc-contactor","status":"publish","type":"product","link":"https:\/\/sayoon-dc.com\/ru\/product\/qzjb50a-d-normally-closed-dc-contactor\/","title":{"rendered":"QZJB50A-D Normally Closed DC Contactor"},"content":{"rendered":"

FEATURES<\/span><\/strong><\/h2>\n
<\/div>\n
Reliability is a major feature of normally closed DC contactors. These devices are designed to withstand frequent switching operations and are suitable for use in demanding industrial environments. Their long service life reduces the need for frequent replacement, which can be expensive and time-consuming. In industries where downtime can result in significant financial losses, the reliability of normally closed DC contactors is a critical factor in maintaining operational efficiency. Their rugged construction ensures they can withstand the rigors of daily use, giving operators and engineers alike peace of mind.<\/div>\n

SAYOON MODEL IMPLICATION<\/strong><\/h2>\n
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\n\n\n\n\n
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QZJB<\/p>\n<\/td>\n

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50A<\/p>\n<\/td>\n

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-D<\/p>\n<\/td>\n

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-S<\/p>\n<\/td>\n

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-\u25a1<\/p>\n<\/td>\n

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-\u25a1<\/p>\n<\/td>\n

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\u25a0<\/p>\n<\/td>\n

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\/\u25a1<\/p>\n<\/td>\n

\n

\n<\/td>\n<\/tr>\n

\n

1<\/p>\n<\/td>\n

\n

2<\/p>\n<\/td>\n

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3<\/p>\n<\/td>\n

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4<\/p>\n<\/td>\n

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5<\/p>\n<\/td>\n

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6<\/p>\n<\/td>\n

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7<\/p>\n<\/td>\n

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8<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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\n\n\n\n\n\n\n\n\n\n\n
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1<\/p>\n<\/td>\n

Product type<\/b><\/b><\/td>\n\u00a0<\/b><\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
\n

2<\/p>\n<\/td>\n

Rated current<\/b><\/b><\/td>\n\u00a0<\/b><\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
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3<\/p>\n<\/td>\n

Coil type: None<\/b>-Double coil structure;\u00a0D<\/b>-Single coil structure<\/b><\/td>\n<\/td>\n<\/td>\n<\/tr>\n
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4<\/p>\n<\/td>\n

Auxiliary switch: None<\/b>-Without auxiliary switch;\u00a0S<\/b>-With auxiliary switch<\/td>\n<\/tr>\n
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5<\/p>\n<\/td>\n

Mounting bracket type: None<\/b>-M Horizontal (default)<\/td>\n<\/tr>\n
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6<\/p>\n<\/td>\n

Other function codes<\/b><\/td>\n<\/tr>\n
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7<\/p>\n<\/td>\n

Other special functions: V-<\/b>With capacitive load<\/td>\n<\/tr>\n
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8<\/p>\n<\/td>\n

Coil rated voltage:\u00a0<\/b>12V, 24V, 36V, 48V, 60V, 72V etc.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

Uses<\/strong><\/h2>\n
This product have one normally close contact, for 5G cabinet, telecommunication equipment, engineering machinery, car batteries, electric forklift trucks, trains, ships, electronic control systems such as uninterruptible power supply.<\/div>\n

Technical Parameters:\u00a0 (Version 1.33)<\/strong><\/h2>\n
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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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\u00a0SAYOON Product Type<\/b><\/p>\n<\/td>\n

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\u00a0QZJB50A-D<\/b><\/p>\n<\/td>\n<\/tr>\n

\u00a0Contact form<\/td>\n\u00a01 NC<\/td>\n<\/tr>\n
\u00a0Coil Rated voltage (DC V)<\/td>\n\u00a06V,12V,24V,36V,48V,60V,72V,96V etc.<\/td>\n<\/tr>\n
\u00a0Contact voltage (DC V)<\/td>\n\u00a0\u2264150V<\/td>\n<\/tr>\n
\u00a0Rated load current of contact 48V circuit (A)<\/td>\n\u00a050A<\/td>\n<\/tr>\n
\u00a0Rate load current of contact circuit<\/td>\n\u00a0\u226f80mV<\/td>\n<\/tr>\n
\u00a0The cooling pull-in voltage at (20\u00b15)\u2103 (V)<\/td>\n\u00a0\u226f70%<\/td>\n<\/tr>\n
\u00a0The cooling drop-out voltage at (20\u00b15)\u2103 (V)<\/td>\n\u00a0\u226f50%,\u226e5%<\/td>\n<\/tr>\n
\u00a0Working voltage range of 40\u2103 coil<\/td>\n\u00a00.8-1.2Us<\/td>\n<\/tr>\n
\u00a0Drop-out time (n\/o contacts to open)<\/td>\n\u00a015ms<\/td>\n<\/tr>\n
\u00a0Pull-in time (n\/o contacts to close)<\/td>\n\u00a05ms<\/td>\n<\/tr>\n
\u00a0Maximum bounce time for contact connection<\/td>\n\u00a010ms<\/td>\n<\/tr>\n
\u00a0Maximum bounce time for contact disconnection<\/td>\n\u00a03ms<\/td>\n<\/tr>\n
\u00a0Insulation resistance<\/td>\n\u00a020M\u03a9<\/td>\n<\/tr>\n
\u00a0Electric strength to resist<\/td>\n\u00a050Hz\/60Hz 1000VAC 1minute<\/td>\n<\/tr>\n
\u00a0Typical fault currents which can be ruptured<\/td>\n\u00a0600A\/5ms at 48V DC<\/td>\n<\/tr>\n
\u00a0Coil power (W)<\/td>\n\u00a05-9<\/td>\n<\/tr>\n
\u00a0Temperature rise of coil (K)<\/td>\n\u00a0\u226460<\/td>\n<\/tr>\n
\u00a0Temperature rise on outgoing terminal (K)<\/td>\n\u00a0\u226465<\/td>\n<\/tr>\n
\u00a0Electrical life<\/td>\n\u00a020,000 times<\/td>\n<\/tr>\n
\u00a0Mechanical life<\/td>\n\u00a0300,000 times<\/td>\n<\/tr>\n
\u00a0Work specification<\/td>\n\u00a0Continuous<\/td>\n<\/tr>\n
\u00a0Contact material<\/td>\n\u00a0Ag alloy<\/td>\n<\/tr>\n
\u00a0Load terminal type<\/td>\n\u00a0M5 Screw<\/td>\n<\/tr>\n
\u00a0Coil terminal type<\/td>\n\u00a0M3 Screw<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

 <\/p>\n

Note:As regarding to the different using environments of customers which requires different focus of the functions,and in order to improve the comprehensive properties of our products,sayoon may adjust the coil parameters,temperature rise and so on. The above parameters are for reference only, For details, please refer to the guidelines for selection and use of the SAYOON DC contactor.<\/p>\n<\/div>\n

Load Characteristic Curve<\/strong><\/h2>\n
    \n
  • \"fzsm-50-20k\"<\/li>\n
  • \"fzsj-50-500\"<\/li>\n<\/ul>\n

    Installation Diagram<\/strong><\/h2>\n
    \"qzj50a-d\"<\/div>\n

    Wiring Diagram<\/strong><\/h2>\n
    \"czw-01_e\"<\/div>\n

    Temperature Curve<\/strong><\/h2>\n
    \"xqws-szj100a-d\"<\/div>\n

    Mechanical Ability And Use Of The Environment<\/strong><\/h2>\n
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    \n\n\n\n\n\n\n\n\n\n\n\n
    \u00a0Contact lead M5 tightening torque (N.m)<\/td>\n\u00a0\u226f2.5 appropriate<\/td>\n<\/tr>\n
    \u00a0Coil lead M3 tightening torque (N.m)<\/td>\n\u00a0\u226f0.8 appropriate<\/td>\n<\/tr>\n
    \u00a0Ambient temperature<\/td>\n\u00a0-25~+70\u2103<\/td>\n<\/tr>\n
    \u00a0Relative humidity<\/td>\n\u00a0+20\u2103 98%<\/td>\n<\/tr>\n
    \u00a0Vibration freq. atthe fixed position<\/td>\n\u00a03G, 1\uff5e50Hz amplitude 0.5mm<\/td>\n<\/tr>\n
    \u00a0Concussion<\/td>\n\u00a0(60\uff5e100) time\/minute\u3001acceleration\u22644g<\/td>\n<\/tr>\n
    \u00a0Altitude<\/td>\n\u00a02000m<\/td>\n<\/tr>\n
    \u00a0Installation direction<\/td>\n\u00a0Random<\/td>\n<\/tr>\n
    \u00a0International Protection<\/td>\n\u00a0IP40 (According IEC60947)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    Order Instruction<\/strong><\/h2>\n
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    \n\n\n\n\n
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    \u00a0SAYOON Product Type<\/b><\/p>\n<\/td>\n

    		\n

    \u00a0QZJB50A-D<\/b><\/p>\n<\/td>\n<\/tr>\n

    \u00a0Mounting bracket type<\/td>\n\u00a0M Horizontal (default)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

     <\/p>\n

    When ordering, please state the following: name, full model, control coil voltage specification, installation frame type, whether with auxiliary contact, order quantity. For example: DC Contactor QZJB50A-D\/24V 100pcs, indicating the load rated current 50A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Discover the QZJB50A-D Normally Closed DC Contactor for reliable performance and safety. Perfect for your electrical projects. Shop now!<\/p>","protected":false},"featured_media":1455,"template":"","meta":{"_gspb_post_css":""},"product_brand":[],"product_cat":[55],"product_tag":[],"class_list":["post-1454","product","type-product","status-publish","has-post-thumbnail","product_cat-qzj-series-dc-contactor","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/product\/1454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/media\/1455"}],"wp:attachment":[{"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/media?parent=1454"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/product_brand?post=1454"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/product_cat?post=1454"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/sayoon-dc.com\/ru\/wp-json\/wp\/v2\/product_tag?post=1454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}