NewTrend · DC contactor
Product overview
The NewTrend NFG400A is a normally open DC relay with a rated control capacity of 400 A at 450 V DC-1. It uses a continuous-duty DC coil with 12 V, 24 V options. Switching life depends on the exact load current and circuit voltage.
Technical selection summary
| Contactor Model | NFG400A |
|---|---|
| Rated Control Capacity | 400A at 450V DC-1 |
| Coil Voltage | DC12V / DC24V |
| Contacts | 1NO |
| Contact Operating Voltage Range | 12–1000V DC; see load-life conditions |
Electrical and mechanical performance
| Main contact form | One normal open |
|---|---|
| Contact working voltage (V (DC)) | 12～1000 |
| Rated control capacity | 400A 450V（DC-1） |
| Rated short-time withstand current and duration | 500A 1200s |
| Additional short-time withstand condition | 700A 300S |
| contact voltage drop (mV) | ≤ 80 @ 100A current |
| Action time (including contact bounce) (ms) | 40 Max. |
| release time (ms) | 12 Max. |
| Contact bounce time (ms) | 6 Max. |
| Maximum breaking current (only once on/off) | 4000；100V |
| Transform the electrical life of the load (non-polar, purely resistive load) (time) | 400A、450V / 5000 times |
| Additional load-life condition | 400A、750V / 1500 times |
| Additional load-life condition | 400A、1000V / 1000 times |
| Auxiliary contact (Optional) (contact form) | / / One normal open |
| Contact load rating | 2A/30V (DC)、3A/125V (AC) |
| Minimum value of contact load | 100mA/8V |
| insulation resistance (MΩ) | 100 (under 500V (DC) conditions) |
| Withstand Voltage (V (AC)) | 3500V (AC) 50 Hz/60 Hz (leakage current ≤ 1mA) 1000V (AC) 50Hz/60Hz (between auxiliary contacts) |
| Operating Temperature (℃) | -40～+85 |
| Operating Humidity | 5%～90%RH |
| altitude (m) | 4000 |
| Shock, 11ms, 1/2 sine wave, peak value (G) | 20 |
| Vibration, sine wave, 80-2000Hz, peak value (G) | 20 |
| Rated working duty | Continuous working duty |
| Weight (approximately) (g) | 922 |
| Installation method | arbitrary |
| Working voltage of coil (V (DC)) | 12 / 24 |
| Maximum coil voltage (V (DC)) | 36 / 36 |
| Maximum surge current of coil (A) | 4.5 / 4.5 |
| Maximum surge time (ms) | ≤110 / ≤110 |
| Coil maintenance power (W) | ≤10 / ≤10 |
| Pick up voltage (V (DC)) | ≤9 / ≤9 |
| Release voltage (V (DC)) | ≤6 / ≤6 |
| Coil polarity | non-polarity |
Typical applications
- Battery supply switching for industrial electric vehicles and forklifts
- Electric winches and battery-powered material-handling equipment
- DC auxiliary supply and industrial machinery power circuits
Download complete NewTrend NFG400A catalogue (PDF)
Product reference images and drawings
NFG400A catalogue – Electrical ratings and coil specifications
NFG400A catalogue – Connection and mounting drawings
