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Siemens 5SJ4 10kA Circuit Breaker - 2-Pole, C-Curve, 10A

Siemens 5SJ4 2-pole circuit breaker, 10A, C-curve, 10kA, UL 489.

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ManufacturerSiemens

Part number5SJ4210-7HG42

Poles 2

Rated Current 10A

Tripping Curve C

Breaking Capacity 10kA

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2-pole design C-curve tripping characteristic 10kA breaking capacity UL 489 listed 10A rated current High reliability

Product description

The Siemens 5SJ4210-7HG42 is a 2-pole miniature circuit breaker designed with a C-curve tripping characteristic, suitable for circuits with moderate inrush currents. It has a rated current of 10A and a breaking capacity of 10kA, providing reliable protection against overloads and short circuits. This UL 489 listed breaker is approved for use in 480Y/277V systems.

This circuit breaker is widely applied in residential, commercial, and light industrial electrical distribution systems. Its C-curve makes it a good choice for protecting circuits with inductive loads, such as motors, transformers, and fluorescent lighting ballasts, where temporary inrush currents are expected.

Stanlo Automation, your trusted veteran-owned source for surplus industrial automation parts, offers the Siemens 5SJ4210-7HG42. We provide competitive pricing and readily available stock to meet your urgent needs and project requirements.

Technical specifications

Poles	2
Rated Current	10A
Tripping Curve	C
Breaking Capacity	10kA
Voltage Rating	480Y/277V AC
Standard	UL 489

Common applications

Distribution panels

Control systems

Lighting circuits

Outlet circuits

Industrial machinery

Compatible systems

480Y/277V AC systems UL 489 installations

Also known as

Siemens 5SJ4 C-curve 10A breaker 5SJ4210-7HG42 breaker Siemens 480V breaker

Replaces / compatible with

Suitable for replacing older Siemens 5SJ series breakers or other UL 489 compliant 2-pole, 10A, C-curve circuit breakers.

Technical note

Expert tip

For applications requiring higher inrush current handling, consider a D-curve breaker from the same Siemens 5SJ series.

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Frequently asked questions

What is the difference between a C-curve and a D-curve breaker like the 5SJ4210-7HG42?

A C-curve breaker, like the 5SJ4210-7HG42, trips between 3 to 5 times the rated current, making it suitable for general use and circuits with moderate inrush. A D-curve breaker trips between 10 to 20 times the rated current, designed for high inrush loads like motors.