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Siemens 5SJ4125-6HG40 Miniature Circuit Breaker - 1-Pole, B-Curve, 25A

Siemens 5SJ4125-6HG40 1-pole Miniature Circuit Breaker, 25A

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ManufacturerSiemens

Part number5SJ4125-6HG40

Poles 1

Current Rating 25A

Voltage Rating 240V

Breaking Capacity 14kA

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12-month warranty

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Veteran-owned

CAGE: 9NK75

1-pole protection B-curve tripping 14kA breaking capacity UL 489 certified Compact design Equal polarity

Product description

The Siemens 5SJ4125-6HG40 is a 1-pole miniature circuit breaker designed for reliable overcurrent protection. It features a B-curve tripping characteristic, a rated voltage of 240V, and a breaking capacity of 14kA. This breaker is compliant with UL 489 standards and has a rated current of 25A.

This circuit breaker is suitable for various industrial and commercial applications, including protecting electrical installations and equipment in control panels, power distribution systems, and machinery. It is commonly used in sectors such as manufacturing, building automation, and renewable energy.

Stanlo Automation, a veteran-owned business, offers a wide selection of surplus industrial automation parts like the Siemens 5SJ4125-6HG40. We provide reliable components and ensure a streamlined purchasing process for your operational needs.

Technical specifications

Poles	1
Current Rating	25A
Voltage Rating	240V
Breaking Capacity	14kA
Curve Type	B
Standard	UL 489
Width	70 mm

Common applications

Control panels

Power distribution

Machine protection

Industrial automation

Commercial buildings

Electrical installations

Compatible systems

Compatible with Siemens 5SJ series accessories and standard DIN rail mounting systems.

Also known as

Siemens 5SJ4125-6HG40 Siemens Miniature Circuit Breaker

Replaces / compatible with

Replaces older Siemens miniature circuit breakers with similar specifications and UL 489 compliance.

Technical note

Expert tip

Ensure proper terminal torque is applied during installation to maintain safety and performance according to UL 489 requirements.

What happens next?

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Frequently asked questions

What is the breaking capacity of the Siemens 5SJ4125-6HG40 circuit breaker?

The Siemens 5SJ4125-6HG40 miniature circuit breaker has a breaking capacity of 14kA. This rating indicates its ability to safely interrupt fault currents up to 14,000 amps at its rated voltage.