ATO ASW400 reversing contactor is used to change the direction of rotation in alternating current motors, start them gently and to monitor their load. Widely used in auto electric winch, telecommunication equiment, engineering machinery and other electric control system.
Features
- 400 amps rated load current of contact circuit.
- 2NO and 2NC contact form.
- 12V, 24V, 48V DC coil rated voltage for selection.
- Main contact voltage drop at 100A, not above 100mV.
- Mechanical life up to 300 thousand times.
400A DC Reversing Contactor Specifications
Basics | Model | CHN-ASW400-2Z |
Body Size | 51*114*160 mm |
Weight | 3150 g |
Technical Parameters | Coil Rated Voltage | 12V/24V/48V |
Rated Load Voltage | 12~60V DC |
Contact Circuit Rated Load Current | 400 A |
Contact Form | 2NO and 2NC |
Overload Current | ≤7 le |
Coil Power | ≤24 W |
Main Contact Voltage Drop at 100A Load | ≤100 mV |
The Allowed Range of Coil Voltage | ±20% |
Pull-In Time (N/O Contacts to Open) | ≤30 ms |
Drop-Out Time (N/O Contact to Close) | ≤20 ms |
Insulation Resistance | ≥50 MΩ |
Dielectric Withstanding Voltage | 50Hz/60Hz 1000VAC/Min |
Auxiliary Contact Rated Load (Option) | 2A/48VDC, 5A/24VDC |
Electric Life | Continuous 20000 times |
Mechanical Life | 300 thousand times |
Environment | Environmental Proctection | IP 50 |
Operating Temperature | -25℃~55℃ |
Operating Humidity | 5~95% RH |
DC Reversing Contactor Circuit Diagram
Installation Diagram (Unit: mm)

Tips: Reasons for the contacts of contactor being unable to separate after powering off
- Control line of the coil is too long, the residual voltage is too large due to the influence of lead capacitance, which is enough to maintain a close situation for the iron core. As a result, the contacts can't be separated.
- Coil of the contactor has burnt out, deformed coil skeleton seizes the movable iron core, which makes it unable to move, thus the contacts can't be separated.
- The contact has been fused.
- The contactor has auto-lock function, and the function is normal.
2 pole reversing contactor has been designed for direct current load, 2NO and 2NC ( DPST-NO, DPST-NC) contact form, rated load current is 400A. IP 50 protection, easy and quick installation, manufacturer direct sale.