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Siemens 5SJ4108-7HG40 1-Pole Miniature Circuit Breaker

Siemens 5SJ4108-7HG40 1-pole, C-curve, 8A Miniature Circuit Breaker.

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ManufacturerSiemens

Part number5SJ4108-7HG40

Poles 1

Current Rating 8A

Trip Curve C

Breaking Capacity 14kA

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Veteran-owned

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14kA interrupting capacity C-curve tripping UL 489 listed 70mm depth Equal polarity Compact design

Product description

The Siemens 5SJ4108-7HG40 is a versatile miniature circuit breaker designed for industrial and commercial applications. This single-pole device features a C-curve tripping characteristic, an 8A current rating, and a substantial 14kA breaking capacity. It operates at 240V and meets UL 489 standards, with a 70mm depth and equal polarity design for simplified installation.

This circuit breaker is well-suited for protecting circuits where moderate inrush currents are expected, such as lighting, socket outlets, and control circuits. Its reliable performance ensures protection against overloads and short circuits, maintaining system integrity and safety.

Stanlo Automation, a veteran-owned business, specializes in surplus industrial automation parts. We offer the Siemens 5SJ4108-7HG40, providing you with cost-effective solutions without compromising on quality or reliability for your critical systems.

Technical specifications

Poles	1
Current Rating	8A
Trip Curve	C
Breaking Capacity	14kA
Voltage Rating	240V AC
Standard	UL 489
Depth	70mm
Polarity	Equal

Common applications

Lighting circuits

Socket outlets

Control systems

Small motor protection

Distribution boards

Building automation

Compatible systems

Standard electrical panels Industrial enclosures Control cabinets

Also known as

Siemens 5SJ4 C8 Miniature Breaker 5SJ4108 C8 UL 489 Siemens 240V 8A breaker

Replaces / compatible with

This unit is an updated version or equivalent to older Siemens miniature circuit breakers with similar ratings and UL 489 certification. Verify compatibility with specific older series if replacing.

Technical note

Expert tip

The 70mm depth and equal polarity design of the 5SJ4108-7HG40 facilitate easier wiring and installation in compact distribution boards and enclosures.

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Frequently asked questions

What type of loads is the Siemens 5SJ4108-7HG40 C-curve breaker best suited for?

The C-curve tripping characteristic of the 5SJ4108-7HG40 makes it ideal for circuits with moderate inrush currents, such as lighting, standard outlets, and control transformers. It provides faster tripping for short circuits and delayed tripping for moderate overloads compared to a B-curve.