NB2-40ZT Smart Miniature Circuit Breaker Datasheet & Manual

NB2-40ZT Smart Miniature Circuit Breaker

The CHINT NB2-40ZT Smart Miniature Circuit Breaker combines traditional circuit protection with intelligent control and monitoring capabilities. Designed for AC 50 Hz, 230 V circuits up to 40 A, it provides protection against overload, short circuit, over-voltage, and under-voltage. With built-in RS485/Bluetooth communication, remote control, and real-time monitoring, it supports energy management, fault diagnosis, and system automation. Compact and efficient, the NB2-40ZT is ideal for smart homes, offices, and industrial control systems.

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FAQs

What makes the NB2-40ZT a “smart” circuit breaker?

It integrates digital communication, remote control, and energy monitoring into a traditional MCB, allowing real-time supervision and control via RS485 or Bluetooth.

How does it enhance safety compared to standard MCBs?

It offers multi-layered protection — including overload, short-circuit, over/under-voltage, and phase open protection, ensuring comprehensive electrical safety.

Can the NB2-40ZT be controlled remotely?

Yes. Through RS485 or Bluetooth, it can be switched ON/OFF or reset remotely and integrated with CHINT smart platforms.

What type of loads is the NB2-40ZT suitable for?

It uses a Type C tripping curve, ideal for resistive and inductive loads such as lighting, HVAC, and motor-driven circuits.

Can it replace a conventional MCB in existing panels?

Yes. Its standard 18 mm width and DIN rail compatibility make it a drop-in replacement for conventional MCBs, adding smart functionality without extra space requirements.

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NB2-40ZT Smart Miniature Circuit Breaker

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