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Siemens 5SJ4125-8HG41 Miniature Circuit Breaker - 1-Pole, D-Curve, 25A

Siemens 5SJ4125-8HG41 1-pole Miniature Circuit Breaker, 25A

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ManufacturerSiemens

Part number5SJ4125-8HG41

Poles 1

Current Rating 25A

Voltage Rating 240V

Breaking Capacity 10kA

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1-pole protection D-curve tripping 10kA breaking capacity UL 489 certified Handles high inrush currents Compact design

Product description

The Siemens 5SJ4125-8HG41 is a 1-pole miniature circuit breaker designed for robust protection, featuring a D-curve tripping characteristic for high inrush currents. It has a voltage rating of 240V, a breaking capacity of 10kA, and is compliant with UL 489 standards. This unit is rated for 25A and features a 70mm width.

This circuit breaker is ideally suited for industrial applications involving motors, transformers, and other equipment that experience significant startup currents. It ensures reliable protection against overloads and short circuits in demanding environments.

Stanlo Automation, a veteran-owned company specializing in surplus industrial automation parts, offers the Siemens 5SJ4125-8HG41. We provide dependable components to meet your operational and maintenance needs.

Technical specifications

Poles	1
Current Rating	25A
Voltage Rating	240V
Breaking Capacity	10kA
Curve Type	D
Standard	UL 489
Width	70 mm

Common applications

Industrial automation

Motor control

Machine protection

Power distribution

Heavy machinery

Electrical safety

Compatible systems

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

Also known as

Siemens 5SJ4125-8HG41 Siemens 240V D-curve breaker

Replaces / compatible with

A direct replacement or compatible option for Siemens 5SJ series circuit breakers with similar 240V, 10kA, D-curve specifications and UL 489 certification.

Technical note

Expert tip

The D-curve's trip characteristic is essential for motor protection applications to avoid premature tripping during startup.

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Frequently asked questions

What is the advantage of the D-curve on the Siemens 5SJ4125-8HG41?

The D-curve on the Siemens 5SJ4125-8HG41 allows it to withstand significantly higher inrush currents (10-20 times the rated current) compared to B or C curves. This prevents nuisance tripping when starting motors or energizing inductive loads, while still providing overcurrent protection.