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Siemens 5SJ4102-8HG42 1-Pole 2A D-Curve Circuit Breaker — 10kA

Siemens 5SJ4102-8HG42 1-pole circuit breaker.

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ManufacturerSiemens

Part number5SJ4102-8HG42

Poles 1

Current Rating 2A

Breaking Capacity 10kA

Tripping Characteristic D

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Veteran-owned

CAGE: 9NK75

10kA breaking capacity D-curve tripping for high inrush UL 489 certified 2A current rating Single pole protection

Product description

The Siemens 5SJ4102-8HG42 is a 1-pole circuit breaker designed for robust protection in demanding applications. It features a D-curve tripping characteristic, a 2A current rating, and a 10kA short-circuit breaking capacity. This breaker is UL 489 listed for 277V applications, making it suitable for circuits that experience high inrush currents.

This circuit breaker is ideal for protecting equipment that requires high starting currents, such as motors, transformers, and certain power supplies. The D-curve ensures reliable operation by preventing nuisance tripping during startup while still providing essential safety against overloads and short circuits.

Stanlo Automation, a veteran-owned surplus parts distributor, provides reliable industrial automation components like the Siemens 5SJ4102-8HG42. We offer competitive pricing, expert technical support, and a commitment to helping you source the right parts to keep your operations running smoothly.

Technical specifications

Poles	1
Current Rating	2A
Breaking Capacity	10kA
Tripping Characteristic	D
Voltage Rating	277V AC
UL Standard	UL 489

Common applications

Industrial motor circuits

Transformer protection

High inrush load protection

Electrical panels

Machine tools

Compatible systems

Industrial equipment Motor control panels Power distribution Automation systems

Also known as

Siemens 5SJ4102 5SJ4102-8HG42 breaker Siemens 10kA D-curve breaker

Replaces / compatible with

This circuit breaker is suitable for replacing Siemens 5SJ4102 series breakers with similar ratings and D-curve characteristics. Always confirm compatibility.

Technical note

Expert tip

For applications requiring frequent switching or where ambient temperatures may fluctuate, ensure the 5SJ4102-8HG42 breaker is installed with adequate ventilation.

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Frequently asked questions

What is the primary advantage of the D-curve in the Siemens 5SJ4102-8HG42 breaker?

The primary advantage of the D-curve in the Siemens 5SJ4102-8HG42 breaker is its ability to handle high inrush currents, typically seen when starting motors or energizing transformers. This characteristic prevents nuisance tripping during these transient events.