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Siemens JXD63B300 3-Pole 300A 600V Molded Case Circuit Breaker

Siemens JXD63B300 3-pole, 300A, 600V molded case circuit breaker.

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ManufacturerSiemens

Part numberJXD63B300

Type JXD

Poles 3

Ampere 300A

Volt 600V AC

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Veteran-owned

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3-Pole configuration 300 Amp rating 600 Volt AC 35kA interrupting capacity Thermal Magnetic trip LI trip function

Product description

The Siemens JXD63B300 is a 3-pole, 3-phase molded case circuit breaker from the Sentron Series, engineered for robust industrial power distribution. It features a 300 Amp rating, a 600 Volt AC voltage rating, and a 35kA interrupting capacity at 480V. This breaker utilizes a non-interchangeable thermal magnetic trip unit for reliable overcurrent protection.

This circuit breaker is designed for use in panelboards, switchboards, and motor control centers. Its LI (Long-Time and Instantaneous) trip function provides protection against both overload and short-circuit conditions, ensuring the safety and integrity of electrical systems.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens JXD63B300. We are dedicated to providing high-quality industrial automation components and efficient service to support your operational needs.

Technical specifications

Type	JXD
Poles	3
Ampere	300A
Volt	600V AC
Phase	3
AIC Rating	35kA@480V
Protection	Thermal Magnetic
Functions	LI (Long-Time and Instantaneous)

Common applications

Industrial power distribution

Panelboards

Switchboards

Motor control centers

Commercial electrical systems

Manufacturing facilities

Compatible systems

Siemens Sentron Panelboards (P4, P5, S4, S5) Switchboards Motor Control Centers

Also known as

Siemens JXD63B300 Sentron JXD63B300 300 Amp 3 Pole Breaker

Replaces / compatible with

The JXD63B300 is part of the Siemens Sentron series and is suitable for direct replacement in compatible systems. While it is a legacy model, it remains a dependable choice for existing electrical infrastructure.

Technical note

Expert tip

This JD frame breaker is designed for unit mounting and is HACR rated, offering versatility for various industrial installation requirements.

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Frequently asked questions

What is the interrupting rating of the Siemens JXD63B300 circuit breaker?

The Siemens JXD63B300 circuit breaker has an interrupting rating of 35 kA at 480V. This specification is crucial for ensuring safe operation during fault conditions.