Description
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
| Model | ATO-SZJ400A-D |
| Contact Form | Normally open |
| Coil Rated Voltage (DC V) | 12V, 24V, 36V, 48V, 60V, 72V, 84V, 120V, 150V, 220V |
| Contact Rated Voltage (DC V) | ≤80V |
| Contact 48V Circuit Rated Load Current (DC-1) | 400A |
| Main Contact Contact Voltage Drop under 100A Load | ≯80mV |
| Cooling pull-in voltage (V), (20±5)℃ | ≯70% |
| Cooling Release Operating Voltage (V), (20±5)℃ | ≯35%, ≮5% |
| 40℃ Coil Operating Voltage Range | 0.8-1.2Us |
| Power-on Action Time | 35ms |
| Power off Release Time | 10ms |
| Maximum Bounce Time of Contact Connection | 10ms |
| Maximum Bounce Time of Contact Disconnection | 3ms |
| Insulation Resistance | 20MΩ |
| Dielectric Strength | 50Hz/60Hz 1000VAC 1minute |
| Maximum Breaking Capacity of Main Contact (Power on for 5ms) | 1000A/5ms at 48V/DC |
| Coil Power Consumption (W) | 9-18 |
| Coil Temperature Rise (K) | ≤60 |
| Terminal Temperature Rise (K) | ≤65 |
| Electrical Life | 20000times |
| Mechanical Life | 300,000 times |
| Work Specifications | Continuous |
| Contact Material | Silver alloy |
| Load Terminal Type | M10 screw |
| Coil Terminal Type | M4 screw |
| Auxiliary Contact Rated Load (Optional) | 2A/48VDC, 5A/24VDC |
| Testing Agency Certification | CCC, CE, FCC, RoHS |
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
Mechanical Capabilities and Usage Environment
| Contact Terminal M8 Tightening Torque (Nm) | ≯20.5 is appropriate |
| Coil Lead-out M4 Tightening Torque (Nm) | ≯1.2 is appropriate |
| Ambient Temperature | -25~+70℃ |
| Relative Humidity | +20℃ 98% |
| Vibration Frequency at Fixed Location | 3G, 1～50Hz, amplitude 0.5mm |
| Impact | (60～100) times/min, acceleration ≤4g |
| Altitude | 2000 meters |
| Installation Direction | Arbitrary |
| Protection Level | IP40 (equivalent to IEC60947) |
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.
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