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Siemens 5SJ4230-8HG42 2-Pole D-Curve Circuit Breaker

Siemens 5SJ4230-8HG42 2-Pole, 30A, D-Curve Miniature Circuit Breaker.

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ManufacturerSiemens

Part number5SJ4230-8HG42

Number of poles 2

Rated current 30 A

Tripping characteristic D

Breaking capacity 10 kA

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12-month warranty

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Veteran-owned

CAGE: 9NK75

2-pole protection D-curve tripping for high inrush loads 10kA short-circuit rating UL 489 certified Robust construction Industrial grade

Product description

The Siemens 5SJ4230-8HG42 is a 2-pole miniature circuit breaker featuring a D-curve tripping characteristic, ideal for applications with high inrush currents. It offers a rated current of 30A and a robust 10kA short-circuit breaking capacity, compliant with UL 489 standards for 480Y/277V systems.

This circuit breaker is well-suited for protecting equipment that experiences significant temporary current surges, such as motors and transformers. Its D-curve provides enhanced protection against nuisance tripping while still offering effective overload and short-circuit protection.

As a veteran-owned surplus distributor, Stanlo Automation specializes in providing high-quality industrial automation components like the Siemens 5SJ4230-8HG42. We ensure that our customers receive reliable parts and exceptional service for their critical MRO needs.

Technical specifications

Number of poles	2
Rated current	30 A
Tripping characteristic	D
Breaking capacity	10 kA
Voltage rating	480Y/277V AC
Standard	UL 489

Common applications

Motor starting circuits

Transformer protection

Industrial machinery

Control panels

Power distribution units

High inrush applications

Compatible systems

Standard DIN rail mounting systems Siemens 5SJ4 series accessories

Also known as

Siemens 5SJ4 D-curve breaker, Siemens 30A D-curve 2-pole, 5SJ42308HG42

Replaces / compatible with

Compatible with Siemens 5SJ4 Series accessories and related components.

Technical note

Expert tip

The D-curve is recommended for circuits where the starting current can be significantly higher than the rated operational current.

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Frequently asked questions

What type of load is the Siemens 5SJ4230-8HG42 circuit breaker best suited for?

The Siemens 5SJ4230-8HG42 features a D-curve tripping characteristic, making it ideal for protecting loads with high inrush currents, such as motors and transformers, without nuisance tripping.