40A 4 Pole C Curve DC1000V (Solar) Type MCB (NB1-63DC-4P-C40)

The 40A 4 Pole C Curve DC1000V (Solar) Type MCB (SKU: NB1-63DC-4P-C40) is a dependable DC miniature circuit breaker designed for use in solar photovoltaic and other direct current energy systems. Manufactured by CHINT, this 4-pole breaker provides strong protection in high-voltage DC environments up to 1000 V, making it an essential component for modern renewable energy installations and energy storage systems.

Built on the trusted NB1-63DC platform, this MCB features a C-curve trip characteristic that balances sensitivity with robustness. The C-curve is ideal for general loads and common DC applications, helping to reduce nuisance tripping while still responding quickly to overloads and short-circuit faults. With a rated current of 40 A, it protects circuits from damage by interrupting excess current safely and reliably.

This unit is particularly suited for solar PV arrays, battery systems, DC bus protection and other DC-powered equipment where maintaining system uptime and safety is crucial. The 1000 V DC rating provides a wide operating range for high-voltage installations, while the 4-pole configuration offers full protection of both positive and negative conductors in multi-string or centralised solar systems.

The compact, DIN-rail mountable design allows for straightforward installation in combiner boxes, control panels and distribution boards, helping installers save valuable space. CHINT’s reputation for quality means this MCB meets recognised international safety standards and delivers consistent performance even under continuous DC load.

Its robust construction supports long service life, while the clear switching mechanism makes operation simple and reliable. Whether you are specifying protective devices for a residential solar array, a commercial PV installation or a DC system requiring dependable overcurrent protection, the NB1-63DC-4P-C40 provides the confidence and performance you need for safe, efficient power distribution.