CHINT · NB1-63DC DC miniature circuit breaker
Product overview
The CHINT 182730 NB1-63DC is a 4P DC miniature circuit breaker for overload and short-circuit protection of DC circuits. This ordering code is rated 4A with a C tripping characteristic of (7–10) In and a rated voltage of DC 1000V, with a rated breaking capacity (Icu) of 6kA to IEC/EN 60947-2. It is certified CCC, CE, CB and TUV, and is built for ambient temperatures from -35℃ to +70℃ at altitudes up to 2000m. DC breakers are not interchangeable with AC breakers: connect the poles in series as shown in the manufacturer wiring diagram and observe the marked polarity.
Technical selection summary
| Ordering code | 182730 |
|---|---|
| Ordering designation | NB1-63DC 4P C4A DC1000V 6kA |
| Model series | NB1-63DC |
| Device type | DC miniature circuit breaker (overload and short-circuit protection) |
| Number of poles | 4P |
| Rated current (In) | 4A |
| Trip curve | C — (7–10) In |
| Rated voltage (Ue) | DC 1000V |
| Rated breaking capacity (Icu) | 6kA |
| Rated impulse withstand voltage (Uimp) | 4kV |
| Electrical life | 1,500 cycles |
| Mechanical life | 20,000 cycles |
| Net weight | 0.48kg (0.12kg per pole) |
| Terminal capacity | 25mm² |
| Tightening torque | 2N·m |
| Ambient temperature | -35℃ to +70℃ |
| Altitude | ≤2000m (derating applies above 2000m) |
| Pollution degree | III |
| Reference standard | IEC/EN 60947-2, RoHS |
| Certification | CCC, CE, CB, TUV |
Typical applications
- PV string and combiner-box protection on DC circuits up to 1000V
- Battery energy storage and DC distribution boards requiring 4A 4P protection
- Telecom and UPS DC power distribution where a verified 6kA DC breaking duty is specified
Download CHINT NB1-63DC catalogue (PDF)
CHINT NB1-63DC DC miniature circuit breaker series
Certificates and downloads
CE · TUV · UKCA · EAC 2017 · EAC 2022 · IRAM · RoHS · REACH · Manual (EN)
