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Siemens 5SJ4302-8HG42 3-Pole D-Curve Circuit Breaker — 2A 480Y/277V

Siemens 5SJ4302-8HG42 3-pole Miniature Circuit Breaker

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ManufacturerSiemens

Part number5SJ4302-8HG42

Poles 3

Current Rating 2A

Tripping Characteristic D

Breaking Capacity 10kA

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Veteran-owned

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3-pole design D-curve for high inrush currents 10kA interrupting rating UL 489 certified Robust construction Compact size

Product description

The Siemens 5SJ4302-8HG42 is a 3-pole miniature circuit breaker designed for reliable overcurrent protection. It features a D-curve tripping characteristic and a rated current of 2A, with a breaking capacity of 10kA. This breaker is compliant with UL 489 standards for 480Y/277V applications.

This circuit breaker is suitable for industrial and commercial installations where robust protection against short circuits and overloads is required. Common applications include protecting motor circuits, lighting systems, and power distribution panels in manufacturing facilities, commercial buildings, and infrastructure projects.

Source your Siemens 5SJ4302-8HG42 from Stanlo Automation, a veteran-owned surplus parts distributor. We offer competitive pricing and reliable service, ensuring you get the automation components you need to keep your operations running smoothly.

Technical specifications

Poles	3
Current Rating	2A
Tripping Characteristic	D
Breaking Capacity	10kA
Voltage Rating	480Y/277V
Standard	UL 489

Common applications

Motor protection

Power distribution

Industrial control panels

Commercial building protection

Lighting circuits

Machinery

Compatible systems

Industrial control panels Building automation systems Motor starter circuits

Also known as

Siemens 5SJ4302-8HG42 circuit breaker Siemens 2A D-curve breaker 5SJ4 Series breaker

Replaces / compatible with

This circuit breaker is part of the Siemens 5SJ4 series and is designed as a direct replacement for other breakers with identical specifications within the same series.

Technical note

Expert tip

The D-curve characteristic of the 5SJ4302-8HG42 is ideal for applications with high inrush currents, such as starting electric motors, where a standard B or C curve might trip prematurely.

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Frequently asked questions

What is the breaking capacity of the Siemens 5SJ4302-8HG42?

The Siemens 5SJ4302-8HG42 circuit breaker has a breaking capacity of 10kA. This indicates its ability to safely interrupt fault currents up to 10,000 amps, providing essential protection against severe electrical events.