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Siemens 5SJ4 2-Pole Miniature Circuit Breaker – 3A, 10kA

Siemens 5SJ4203-7HG42 2-pole Miniature Circuit Breaker

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ManufacturerSiemens

Part number5SJ4203-7HG42

Rated Current 3A

Poles 2

Trip Curve C

Breaking Capacity 10kA

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Veteran-owned

CAGE: 9NK75

2-pole protection C-curve tripping 10kA breaking capacity UL 489 listed Compact design

Product description

The Siemens 5SJ4203-7HG42 is a 2-pole miniature circuit breaker featuring a 3A rated current and a C-curve tripping characteristic. It offers a breaking capacity of 10kA, compliant with UL 489 standards for reliable circuit protection up to 480Y/277V. This breaker is designed for general-purpose applications.

This circuit breaker is widely used in control panels, distribution boards, and electrical systems to protect against overloads and short circuits. Its applications span manufacturing, building automation, and other industrial sectors requiring dependable electrical safety.

Stanlo Automation, a veteran-owned supplier, carries the Siemens 5SJ4203-7HG42 and a broad selection of surplus industrial automation parts. We are committed to providing quality components, competitive pricing, and rapid delivery to minimize your system downtime.

Technical specifications

Rated Current	3A
Poles	2
Trip Curve	C
Breaking Capacity	10kA
Voltage	480Y/277V AC
Standard	UL 489

Common applications

Control Panels

Distribution Boards

Industrial Machinery

Building Automation

Electrical Protection

Compatible systems

Standard distribution panels DIN rail mounting systems Control enclosures

Also known as

Siemens 5SJ4 3A breaker 5SJ42037HG42 Siemens 2 pole 10kA breaker Siemens circuit breaker

Replaces / compatible with

This model serves as a direct replacement for other Siemens 5SJ4 series circuit breakers with identical specifications. It is designed for standard DIN rail mounting.

Technical note

Expert tip

The 480Y/277V AC rating is crucial for ensuring compliance with electrical codes in North American industrial facilities.

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Frequently asked questions

What are the primary applications for the Siemens 5SJ4203-7HG42?

The Siemens 5SJ4203-7HG42 is primarily used for general circuit protection in industrial and commercial settings. Its 3A rating and C-curve are suitable for circuits with moderate inrush currents, such as lighting and control circuits.