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Siemens 5SJ4310-8HG42 3-Pole D-Curve Circuit Breaker 10A 10kA

Siemens 5SJ4310-8HG42 3-pole D-curve miniature circuit breaker.

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ManufacturerSiemens

Part number5SJ4310-8HG42

Poles 3

Current Rating 10A

Tripping Characteristic D

Interrupting Capacity 10kA

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3-pole design D-curve for high inrush 10kA interrupting capacity UL 489 listed Motor and transformer protection

Product description

The Siemens 5SJ4310-8HG42 is a robust 3-pole miniature circuit breaker designed for high-demand applications. It features a D-curve tripping characteristic, a 10A rated current, and a 10kA interrupting capacity, providing excellent protection against short circuits and overloads. This breaker is UL 489 listed for 480Y/277V systems.

This circuit breaker is particularly suited for protecting equipment with high inrush currents, such as motors, transformers, and welding equipment. The D-curve ensures that these loads do not cause nuisance tripping while still providing effective protection against severe faults.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SJ4310-8HG42 to meet your industrial needs. We provide reliable, cost-effective surplus components to keep your operations running. Count on Stanlo Automation for quality Siemens circuit breakers.

Technical specifications

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

Common applications

Motor protection

Transformer protection

Welding equipment

High inrush loads

Industrial machinery

Compatible systems

UL 489 rated electrical panels 480Y/277V AC systems Motor control circuits Transformer circuits

Also known as

Siemens 5SJ4 D-curve 10A breaker 5SJ4 Series 3-pole breaker Siemens 480V D-curve breaker

Replaces / compatible with

This Siemens breaker can replace older 3RV series or equivalent 3-pole, 10A, D-curve circuit breakers compliant with UL 489 standards.

Technical note

Expert tip

When used for motor protection, ensure the 10A rating and D-curve are coordinated with the motor's full load current and starting characteristics per NEMA or IEC standards.

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Frequently asked questions

Why choose a D-curve breaker like the Siemens 5SJ4310-8HG42 for motor applications?

The D-curve tripping characteristic of the 5SJ4310-8HG42 is specifically designed to accommodate the high starting currents (inrush currents) of motors and transformers without tripping. This ensures reliable operation of motor-driven equipment while still providing overcurrent protection.