NewTrend · DC contactor
Product overview
The NewTrend NFG50DK is a normally open DC relay with a rated control capacity of 50 A at 450 V DC-1. It uses a continuous-duty, non-energy-saving coil with 12 V, 24 V and 48 V DC options. Switching life depends on the exact load current and circuit voltage.
Technical selection summary
| Contactor Model | NFG50DK |
|---|---|
| Rated Control Capacity | 50A at 450V DC-1 |
| Coil Voltage | DC12V / DC24V / DC48V |
| Contacts | 1NO |
| Contact Operating Voltage Range | 12–1000V DC; see load-life conditions |
Electrical and mechanical performance
| Main contact form | One normal open |
|---|---|
| Operating voltage of contact (V (DC）) | 12～1000 |
| Rated control capacity | 50A 450V（DC-1） |
| Rated short-time withstand current and duration | 100A 300s |
| Additional short-time withstand condition | 200A 30s |
| contact voltage drop (mV) | ≤80@50A |
| Action time (including contact bounce) (ms) | ≤25 |
| release time (ms) | ≤12 |
| Contact bounce time (ms) | ≤6 |
| Maximum breaking current (only one breaking allowed) | 350A，80V |
| Load life (non-polarized, pure resistive load) (time) | 50A, 450V / 5000 |
| Additional load-life condition | 50A, 750V / 2000 |
| Additional load-life condition | 50A, 1000V / 1000 |
| insulation resistance (MΩ) | 100 (under the condition of 500V (DC)) |
| Withstand Voltage (V (AC）) | 2200V (AC) 50 Hz/60 Hz (Leakage current ≤1mA) |
| Operating Temperature (℃) | -40～+85 |
| Operating Humidity | 5%～90% |
| Impact, 11ms, 1/2 sine wave, peak value (G) | 20 |
| Vibration, sine wave, 80~2000Hz, peak value (G) | 20 |
| Rated duty cycle | Continuous working duty |
| Weight (approximately) (g) | 170 |
| Installation method | arbitrary |
| Coil type | Non-energy-saving type |
| Rated voltage of coil (Us) | 12V (DC） / 24V (DC） / 48V (DC） |
| Operating voltage range (@20℃) | 85%Us～110%Us |
| Pickup voltage (V (DC)) @20℃ | ≤9 / ≤18 / ≤36 |
| Release voltage (V (DC)) @20℃ | ≥1 / ≥2 / ≥4 |
| Maximum surge current of coil (A) | / / / / / |
| Maximum surge time (ms) | / / / / / |
| Coil holding current (A) @20℃ | ≤0.6 / ≤0.3 / ≤0.15 |
| Coil holding power (W) @20℃ | ≤6 / ≤6 / ≤6 |
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 NFG50DK catalogue (PDF)
Product reference images and drawings
NFG50DK catalogue – Electrical ratings and coil specifications
NFG50DK catalogue – Connection and mounting drawings
