Description
High-performance 350A high voltage DC contactor features 9-36V coil voltage range, NO contact type, non-polarity, and NO/NC auxiliary contact, capable of withstanding continuous loads of DC and the intense arcing that occurs during disconnection.
Features
- 350A DC contactor adopts high-strength epoxy resin sealing with nitrogen-based gas filling, eliminating arc leakage risks, preventing contact oxidation, and ensuring safe operation without fire or explosion during its service life.
- It provides reliable performance with 350A continuous current at 85℃, IP67 contact protection, insulation resistance up to 100MΩ (1000V DC), and dielectric strength of 3.5kV between contacts and coil.
- High voltage DC contactor meets IEC 60664-1, GB/T14048.1, GB/T14048.4 standards, complies with RoHS (2015/863/EU) and REACH (1907/2006/EC), and is certified by CE, CCC, and RoHS.
Specifications
| Model | ATO-ADH-350 | |
| Main Contact Specification | ||
| Contact Arrangement | 1K (1NO) | |
| Contact Polarity | Non-polarity | |
| Contact Resistance | ≤0.5mΩ (at 350A) | |
| Max. Switching Voltage | 1,000V DC | |
| Max. Breaking Current | 2,000A (320V DC) 1 Ops | |
| Electrical Endurance (Resistive Load) | 3,000 Ops (1,000V DC, 350A) | |
| 5,000 Ops (750V DC, 350A) | ||
| 6,000 Ops (500V DC, 350A) | ||
| Mechanical Endurance | 300,000 Ops | |
| Withstand Current | 350A, Continuous | |
| 400A, 60min | ||
| 500A, 5min | ||
| 2,100A, 1s | ||
| 10,000A, 10ms | ||
| Performance Parameter (at 23℃) | ||
| Pickup Voltage | See Coil Parameter Tables | |
| Dropout Voltage | See Coil Parameter Tables | |
| Pickup Time | ≤25ms | |
| Contact Bounce Period | ≤5ms | |
| Dropout Time | ≤6ms | |
| Dielectric Strength | Between Main Contacts | 12,000V DC 1min |
| Between Main Contact and Coil | 3,500V DC 1min | |
| Insulation Resistance | Initial State | 100MΩ 1min |
| After Electrical Life | 50MΩ 1min | |
| Shock | Stability | 20g (Power On) |
| Strength | 50g | |
| Vibration | 10g, 10~500Hz, 1/2 Sine Wave (Power On) | |
| Relative Humidity | 5%~95%RH | |
| Temperature | -40℃~85℃ | |
| Load Terminal | External Thread M8 | |
| Weight | About 480g | |
| Dimension | 80×65.5×72.5mm | |
| Temperature Rise | Main Contact Temperature Rise≤65K (120mm2, 350A Continuous) | |
| Auxiliary Contact Parameter | ||
| Aux. Contact Arrangement | FK/FB/FZ (1NO/1NC/1CO) | |
| Aux. Contact Rated Current | 5A | |
| Aux. Contact Max. Breaking Voltage | 120V DC | |
| Coil Parameter | ||
| Coil Voltage | 9-36V | |
| Pickup Voltage (DC) | 9-36V | |
| Dropout Voltage (DC) | 5-7V | |
| Coil Resistance | 3.3Ω±10% | |
| Starting Power | 25W±10% | |
| Holding Power | 3.0W±10% |
Dimensions (Unit: mm)
Wiring Diagram
Note: A1&A2 main terminals with non-polarity; 3&4 auxiliary contact terminals; 1&2 Circuit diagram.
Applications
High voltage DC contactors are widely applied in electric vehicles (EVs), renewable energy systems (solar and wind), energy storage systems (ESS), DC charging stations, uninterruptible power supplies (UPS), and industrial equipment that requires safe and reliable DC switching.
Tips: What is a High Voltage DC Contactor?
The High Voltage DC Contactor is an electrically controlled switch designed to safely make or break high-voltage direct current circuits. Unlike AC contactors, they are built to handle the unique challenges of DC, such as arc suppression and continuous current carrying at high voltages.
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