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Siemens 5SJ4118-8HG41 1-Pole D-Curve Circuit Breaker - 15A

Siemens 5SJ4118-8HG41 1-pole, D-curve, 15A miniature circuit breaker.

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ManufacturerSiemens

Part number5SJ4118-8HG41

Type Miniature Circuit Breaker

Poles 1

Current Rating 15 A

Tripping Characteristic D

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1-pole design D-curve tripping 14kA interrupting capacity UL 489 listed 15A rating 70mm depth

Product description

The Siemens 5SJ4118-8HG41 is a single-pole miniature circuit breaker featuring a D-curve tripping characteristic, rated for 15A. It offers a high short-circuit breaking capacity of 14kA and is designed for 240V systems. The breaker has a width of 70mm and complies with UL 489 standards.

This breaker is ideal for protecting circuits with high inrush currents, such as those powering motors, transformers, and fluorescent lighting ballasts. The D-curve provides a time delay before tripping, preventing nuisance tripping during these temporary current surges.

Stanlo Automation, a trusted veteran-owned distributor of surplus industrial automation parts, offers the Siemens 5SJ4118-8HG41. Source this reliable circuit breaker from us to ensure your machinery and systems are protected while optimizing your procurement costs.

Technical specifications

Type	Miniature Circuit Breaker
Poles	1
Current Rating	15 A
Tripping Characteristic	D
Breaking Capacity	14 kA
Voltage Rating	240V AC
Depth	70 mm
Standard	UL 489

Common applications

Motor control circuits

Transformer protection

Industrial machinery

Power distribution

Automation systems

Compatible systems

Motor starters Control transformers Industrial automation equipment Power distribution panels

Also known as

Siemens 5SJ4118-8HG41 5SJ4 Series breaker Siemens 15A D-curve MCB

Replaces / compatible with

This part replaces older Siemens miniature circuit breakers with equivalent specifications. Check the Siemens 5SJ4 series documentation for direct compatibility.

Technical note

Expert tip

The 70mm depth specification is important for panel builders to ensure proper spacing and fit within enclosures. The D-curve is critical for protecting inductive loads that experience significant startup current.

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Frequently asked questions

What applications are best suited for the Siemens 5SJ4118-8HG41 with its D-curve?

The D-curve characteristic of the Siemens 5SJ4118-8HG41 makes it ideal for circuits with high inrush currents, such as those powering motors or transformers. It allows for temporary overcurrents during startup without tripping, while still providing fast protection against short circuits.