400A DC Contactor, 12V/24V/48V/220V

High performance 400A DC contactor with normally open type. This 400 amps contactor is available in coil voltage 12V, 24V, 48V, 220V. 400A DC contactor with high-performance quality, low cost and manufacturer direct sale. The single pole 400A DC contactor is suitable for switch control of electric circuits such as electric forklifts, battery trucks, tractors, excavators, brick making machines, etc.

Features

• 400A DC contactor has the characteristics of small size, large load capacity, long service life and simple maintenance, and is very popular among users.
• 400 amps contactor complies with the requirements of the ministry standards JB2286-78, JB3974-85, YD/585-92, YD/T512-92. It has been tested in the factory and by relevant testing units and meets the requirements of the ministry standards. It has been used by users for many years to satisfy users to the maximum extent. Needed, reliable quality.
• Single coil 400A DC contactor are suitable for electric forklifts, battery trucks, tractors, excavators, brick making machines, cleaning vehicles, automotive air conditioners, communication power supplies, switch control of electronic control circuits of uninterruptible power supplies, electroplating power supplies and other systems.

Specifications

Load Characteristic Curve

Installation Dimension Diagram

SZJ400A-D Wiring Diagram & Coil Temperature Rise Curve Graph

One way is normally open (SPST 1NO)
1 and 2 are contact terminals
A1 and A2 are coil terminals

SZJ400A Wiring Diagram & Coil temperature Rise Curve Graph

One way is normally open (SPST 1NO)
1 and 2 are contact terminals
A1 and A2 are coil terminals
L1 is the take-off winding L2 is the holding winding

Mechanical Capabilities and Usage Environment

Tips: How to judge the quality of DC contactor?

• Appearance: Check the DC contactor for abnormal wear, deformation or corrosion.
• Electrical performance: Use a multimeter or rack test equipment to test the continuity of the circuit and check for damage or open circuits.
• Mechanical performance: Check the sensitivity, operating force and reset condition of the DC power contactor switch to see if there are any problems that are too large or too small.
• Insulation performance: Test the DC contactor to check whether there is leakage or load current drop.
• DC contact material: The material of the contacts determines the service life of the DC power contactor. The cost of really good contacts is relatively high and is made of silver alloy. Some inferior contacts are made of copper alloy, or a layer of silver is electroplated on the copper contacts. Alloys have a very short service life.