BTM7-400L/3300 3-Pole MCCB Molded Case Circuit Breaker 400A

Product Features

The BTM7-400L/3300 is a 3-pole molded case circuit breaker designed for switching and protecting AC electrical circuits. With a rated current of 400A, it is suitable for medium- and high-current power distribution and circuit protection applications.

The product features clearly identified three-phase terminals and a robust molded case construction. The front-mounted operating handle provides convenient manual switching and circuit control.

The circuit breaker supports AC operating voltages including 380V, 400V and 415V, as well as higher-voltage applications up to 690V AC. It also features a rated insulation voltage of 1000V and a rated impulse withstand voltage of 12kV.

The front panel includes a PUSH TO TRIP function for practical testing and operation. The product is marked with IEC 60947-2, GB/T 14048.2 and CE-related markings.

Application

Suitable for industrial power distribution systems, electrical control panels, commercial buildings, machinery, factories and other AC electrical applications.

It can be used for circuit protection, switching and isolation of electrical equipment, distribution circuits and other high-current AC loads where reliable molded case circuit breaker protection is required.

Specifications

Model: BTM7-400L/3300
Product type: Molded Case Circuit Breaker (MCCB)
Number of poles: 3 poles
Rated current In: 400A
Rated frequency: 50/60Hz
Rated insulation voltage Ui: 1000V
Rated impulse withstand voltage Uimp: 12kV
Rated operating voltage Ue: AC380/400/415V; AC660/690V
Instantaneous release current Ii: 10In
Rated short-circuit breaking capacity Icu: 50kA / 36kA
Service short-circuit breaking capacity Ics: 10kA / 7.5kA
Utilization category: Category A
Standard: IEC 60947-2 / GB/T 14048.2
Reference ambient temperature: +40℃

Product Details

The BTM7-400L/3300 features a robust molded case structure designed for reliable operation in high-current AC electrical systems. The three-pole configuration provides coordinated switching and protection for three-phase circuits.

The front operating handle provides clear ON/OFF operation, while the PUSH TO TRIP function supports practical circuit breaker testing. The large terminal openings at the top and bottom provide convenient access for electrical connection.

The product nameplate clearly displays the model, rated current, voltage, breaking capacity and other key electrical parameters, making it convenient for product identification, selection and installation in industrial power distribution systems.