CHINT · Miniature circuit breaker
Product overview
The CHINT 179931 NB1-63H is a four-pole D40 miniature circuit breaker for overload and short-circuit protection in residential, commercial and industrial distribution circuits. This code has a rated current of 40A, a D tripping characteristic and a rated short-circuit capacity (Icn) of 10kA under IEC/EN 60898-1. It operates at 400V AC, 50/60Hz and occupies 4 DIN-rail modules (72mm).
Technical selection summary
| Ordering code | 179931 |
|---|---|
| Ordering model | NB1-63H/D40-4P-10 |
| Model series | NB1-63H |
| Poles | 4P |
| Rated current | 40A |
| Trip curve | D |
| Rated voltage / frequency | 400V AC / 50/60Hz |
| Rated short-circuit capacity (Icn) | 10kA — IEC/EN 60898-1 |
| Ultimate breaking capacity (Icu) | 10kA — IEC/EN 60947-2 |
| Energy-limiting class | 3 |
| DIN-rail width | 4 modules / 72mm |
| Dimensions (H × W × D) | 86 × 72 × 78mm |
| Mounting | 35mm DIN rail |
| Compatible accessories | XF9 auxiliary contact; XF9J alarm contact; S9 shunt release; V9 undervoltage release |
Typical applications
- Final distribution circuits requiring 40A D-curve overload and short-circuit protection
- Residential, commercial and industrial distribution boards with a verified 10kA fault-duty requirement
Download CHINT NB1-63H complete catalogue (PDF)
Product reference images and drawings
