Tomzn 4P 40A AC MCB

Tomzn 4P 40A AC MCB – Comprehensive 4-Pole Circuit Protection for 3-Phase Systems

The Tomzn 4P 40A AC Miniature Circuit Breaker (MCB) is a reliable and efficient protective device designed to safeguard electrical installations from overcurrent, short circuits, and overloads in three-phase AC systems. Built for residential, commercial, and light industrial applications, this 4-pole MCB ensures all phases and the neutral line are simultaneously protected and isolated.

With a rated current of 40A, the Tomzn MCB is ideal for medium-load applications, such as motor circuits, power distribution boards, and three-phase machinery. It operates at a standard AC voltage of 230/400V, providing stable and responsive protection across a wide range of electrical systems.

The 4-pole configuration enhances safety by disconnecting all lines at once during a fault, reducing the risk of electrical hazards and equipment damage. Its thermal-magnetic trip mechanism delivers accurate and fast response to both prolonged overloads and sudden short-circuit conditions.

Key Features:

• Poles: 4P (3 phases + neutral)

• Rated Current: 40A

• Voltage Rating: 230/400V AC

• Breaking Capacity: 6kA

• Tripping Curve: Typically Type C (suitable for general and inductive loads)

• Trip Mechanism: Thermal-magnetic

• Mounting: 35mm DIN rail

• Housing: Flame-retardant thermoplastic (UL94-V0 rated)

• Operating Temperature: -25°C to +70°C

• Indicator: ON/OFF status window

• Standards: Compliant with IEC/EN 60898-1\

Why Choose Tomzn 4P 40A AC MCB?

Tomzn is known for manufacturing high-quality, cost-effective electrical protection devices. The Tomzn 4P 40A AC MCB is designed for professionals seeking dependable circuit protection across all phases in 3-phase systems. With robust build quality, precise performance, and easy installation, it’s a smart choice for enhancing the safety and efficiency of your electrical network.

Benefits:

• Full System Isolation: Simultaneous switching of all lines improves safety and maintenance access

• Reliable Protection: Responds effectively to overloads and short circuits

• Durable Construction: Long-lasting performance in tough electrical environments

• Easy Integration: DIN rail compatibility for quick installation and replacement

• Compact Design: Space-saving for dense distribution boards

Applications:

• Three-phase power distribution boards

• Industrial and commercial electrical systems

• Motor protection circuits

• HVAC and machinery control panels

• Backup generator protection