CHINT NB1-B2-2P NB1-63-B2 Miniature Circuit Breaker

CHINT NB1-B2-2P NB1-63-B2 Miniature Circuit Breaker is a two-pole protective device in CHINT’s NB1 family, designed for reliable overload and short-circuit protection in low-voltage installations. It is rated for 63 A and offers a 6 kA interrupting capacity, operating up to 400 V AC. The unit uses a B‑type thermo-magnetic release, with an instantaneous magnetic trip in the 3–5 In range to augment thermal protection for typical lighting and general power circuits. With a width of 18 mm per pole, the NB1-63-B2 2P fits compactly in standard distribution boards and is available as part of a broader NB1‑63 lineup that includes 1P, 2P, 3P, and 4P configurations for systems up to 400 V. It conforms to IEC/EN 60898‑1, making it suitable for residential and light commercial branch circuits that require reliable interruption of faults and overloads. As the 2P version of the NB1-63 series, this model protects two conductors and ensures simultaneous disconnection under fault conditions, aligning with common electrical-safety practices in many regions.