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Siemens CJ3-B400 400A 3-Pole Molded Case Circuit Breaker

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ManufacturerSiemens

Part numberCJ3-B400

Part Number CJ3-B400

Manufacturer Siemens

Type Molded Case Circuit Breaker

Amperage Rating 400A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

400 Amp Rating 3-Pole Configuration Thermal-Magnetic Trip Unit Current Limiting Durable Industrial Design Reliable Overcurrent Protection

Product description

The Siemens CJ3-B400 is a robust molded case circuit breaker designed for reliable electrical protection in industrial automation and marine applications. It features a 400 Amp rating and a 3-pole configuration, suitable for managing demanding electrical loads. This breaker is engineered to safeguard circuits from overloads and short circuits, ensuring the operational integrity of critical systems.

With its durable design, the CJ3-B400 is built to withstand harsh environments. It offers high-performance protection, easy installation, and enhanced safety, making it a preferred choice for professionals in various industries where dependable power distribution is paramount.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens CJ3-B400. We are committed to providing quality industrial components and excellent customer service. Source your automation and electrical protection needs from Stanlo Automation for reliability and value.

Technical specifications

Part Number	CJ3-B400
Manufacturer	Siemens
Type	Molded Case Circuit Breaker
Amperage Rating	400A
Voltage Rating	600V
Poles	3
Phase	3
Trip Type	Thermal Magnetic
Frame	CJ Frame
Series	Cordon

Common applications

Industrial Automation

Marine Applications

Power Distribution

Motor Control

Heavy Machinery Protection

Compatible systems

Siemens Switchboards ITE Motor Control Centers Industrial power distribution systems

Also known as

Siemens CJ3-B400 ITE Siemens CJ3-B400 CJ3-B400 Circuit Breaker

Replaces / compatible with

This circuit breaker is part of the ITE Siemens Cordon series and can be used in existing ITE and Siemens switchboards or motor control centers as a direct replacement or upgrade.

Technical note

Expert tip

Ensure proper lug selection and torque specifications are followed when installing conductors to the CJ3-B400 terminals for safe and reliable operation.

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Frequently asked questions

What type of protection does the Siemens CJ3-B400 circuit breaker provide?

The Siemens CJ3-B400 circuit breaker provides thermal-magnetic protection. This means it uses a thermal element to detect sustained overloads and a magnetic element to react instantly to short circuits, ensuring comprehensive protection against common electrical faults.