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MCCB 380V 3 Phase 4 Wire Molded Case Circuit Breaker for Industrial Power Protection

The BSM1 series MCCB molded case circuit breaker is designed for 380V/400V three-phase power distribution systems. It is available in 3P and 4P versions, suitable for overload protection, short-circuit protection, isolation control, and general industrial power safety applications.
With a durable flame-retardant housing, copper contacts, stable breaking performance, and convenient installation structure, this MCCB is widely used in distribution cabinets, machinery equipment, factory power syste

MCCB 380V 3 Phase 4 Wire Molded Case Circuit Breaker for Industrial Power Protection

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Key Features Technical Specifications Explanation of 3P and 4P Applications FAQ

  • Suitable for 380V / 400V three-phase power systems
  • Available in 3P and 4P configurations
  • Designed for overload and short-circuit protection
  • Flame-retardant molded case housing
  • Copper conductive parts for stable current carrying capacity
  • Manual ON/OFF switching with clear handle position
  • Compact structure, easy installation and maintenance
  • Suitable for industrial, commercial, and power distribution applications
  • Supports three-phase three-wire and three-phase four-wire systems
  • Reliable protection for motors, equipment, panels, and distribution circuits
ItemSpecification
Product NameMCCB Molded Case Circuit Breaker
SeriesBSM1 Type
Rated VoltageAC 380V / 400V
Rated Insulation VoltageUp to 690V
Rated Current63A / 125A / customized options
Pole Options3P / 4P
Application SystemThree-phase three-wire / three-phase four-wire
Breaking Capacity25kA / 35kA / 50kA depending on model
Frequency50/60Hz
Installation TypePanel mounting
Shell MaterialFlame-retardant molded case
Protection FunctionOverload and short-circuit protection
ApplicationPower distribution, machinery, electrical panels


3P MCCB

Used for three-phase three-wire systems. It controls three live wires: L1, L2, and L3.

4P MCCB

Used for three-phase four-wire systems. It controls three live wires plus one neutral wire: L1, L2, L3, and N.

For systems requiring 220V lighting or single-phase loads from a three-phase supply, the 4P model is usually more suitable because it includes the neutral line.


This MCCB molded case circuit breaker is suitable for:

  • Industrial power distribution cabinets
  • Factory electrical control panels
  • Three-phase motor protection
  • Building power distribution systems
  • Machinery equipment power control
  • Commercial electrical systems
  • 380V / 400V three-phase circuits
  • Three-phase four-wire power systems
  • Overload and short-circuit protection systems

Q1: What is the difference between 3P and 4P MCCB?

A 3P MCCB controls three live wires, while a 4P MCCB controls three live wires plus one neutral wire. For three-phase four-wire systems, 4P is recommended.

Q2: Can this MCCB be used for 380V power systems?

Yes. This MCCB is suitable for AC 380V / 400V three-phase power distribution systems.

Q3: What current ratings are available?

Common options include 63A and 125A. Other current ratings can be supplied according to customer requirements.

Q4: Is it suitable for industrial equipment?

Yes. It is widely used in industrial machinery, power distribution cabinets, control panels, and factory electrical systems.

Q5: Does the product support overload protection?

Yes. The MCCB provides overload and short-circuit protection for electrical circuits and equipment.


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Key Features
  • Suitable for 380V / 400V three-phase power systems
  • Available in 3P and 4P configurations
  • Designed for overload and short-circuit protection
  • Flame-retardant molded case housing
  • Copper conductive parts for stable current carrying capacity
  • Manual ON/OFF switching with clear handle position
  • Compact structure, easy installation and maintenance
  • Suitable for industrial, commercial, and power distribution applications
  • Supports three-phase three-wire and three-phase four-wire systems
  • Reliable protection for motors, equipment, panels, and distribution circuits
Technical Specifications
ItemSpecification
Product NameMCCB Molded Case Circuit Breaker
SeriesBSM1 Type
Rated VoltageAC 380V / 400V
Rated Insulation VoltageUp to 690V
Rated Current63A / 125A / customized options
Pole Options3P / 4P
Application SystemThree-phase three-wire / three-phase four-wire
Breaking Capacity25kA / 35kA / 50kA depending on model
Frequency50/60Hz
Installation TypePanel mounting
Shell MaterialFlame-retardant molded case
Protection FunctionOverload and short-circuit protection
ApplicationPower distribution, machinery, electrical panels


Explanation of 3P and 4P

3P MCCB

Used for three-phase three-wire systems. It controls three live wires: L1, L2, and L3.

4P MCCB

Used for three-phase four-wire systems. It controls three live wires plus one neutral wire: L1, L2, L3, and N.

For systems requiring 220V lighting or single-phase loads from a three-phase supply, the 4P model is usually more suitable because it includes the neutral line.


Applications

This MCCB molded case circuit breaker is suitable for:

  • Industrial power distribution cabinets
  • Factory electrical control panels
  • Three-phase motor protection
  • Building power distribution systems
  • Machinery equipment power control
  • Commercial electrical systems
  • 380V / 400V three-phase circuits
  • Three-phase four-wire power systems
  • Overload and short-circuit protection systems
FAQ

Q1: What is the difference between 3P and 4P MCCB?

A 3P MCCB controls three live wires, while a 4P MCCB controls three live wires plus one neutral wire. For three-phase four-wire systems, 4P is recommended.

Q2: Can this MCCB be used for 380V power systems?

Yes. This MCCB is suitable for AC 380V / 400V three-phase power distribution systems.

Q3: What current ratings are available?

Common options include 63A and 125A. Other current ratings can be supplied according to customer requirements.

Q4: Is it suitable for industrial equipment?

Yes. It is widely used in industrial machinery, power distribution cabinets, control panels, and factory electrical systems.

Q5: Does the product support overload protection?

Yes. The MCCB provides overload and short-circuit protection for electrical circuits and equipment.


MCCB 380V 3 Phase 4 Wire Molded Case Circuit Breaker for Industrial Power Protection
The BSM1 series MCCB molded case circuit breaker is designed for 380V/400V three-phase power distribution systems. It is available in 3P and 4P versions, suitable for overload protection, short-circuit protection, isolation control, and general industrial power safety applications.
With a durable flame-retardant housing, copper contacts, stable breaking performance, and convenient installation structure, this MCCB is widely used in distribution cabinets, machinery equipment, factory power syste
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MCCB 380V 3 Phase 4 Wire Molded Case Circuit Breaker for Industrial Power Protection

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