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Siemens 5SJ4340-7HG42 3-Pole C-Curve Circuit Breaker - 40A

Siemens 5SJ4340-7HG42 3-pole C-curve miniature circuit breaker, 40A.

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ManufacturerSiemens

Part number5SJ4340-7HG42

Type Miniature Circuit Breaker

Manufacturer Siemens

Part Number 5SJ4340-7HG42

Poles 3

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3-pole configuration C-curve tripping characteristic 10kA interrupting capacity UL 489 listed Robust construction Reliable protection

Product description

The Siemens 5SJ4340-7HG42 is a 3-pole miniature circuit breaker designed for reliable overcurrent protection in industrial and commercial settings. It features a C-curve tripping characteristic, a 10kA interrupting rating, and is rated for 40A at UL 489-480Y/277V.

This circuit breaker is suitable for a wide range of applications, including power distribution, motor circuits, and general industrial loads that may experience moderate inrush currents. Its C-curve provides effective protection against both overloads and short circuits.

Stanlo Automation, a veteran-owned provider of surplus industrial automation parts, offers the Siemens 5SJ4340-7HG42 with competitive pricing and fast delivery. Rely on us for quality components to maintain your critical operations without interruption.

Technical specifications

Type	Miniature Circuit Breaker
Manufacturer	Siemens
Part Number	5SJ4340-7HG42
Poles	3
Current Rating	40A
Trip Curve	C
Interrupting Rating	10kA
Voltage Rating	UL 489-480Y/277V
Series	5SJ4

Common applications

Power Distribution

Motor Circuits

Industrial Loads

Control Panels

Automation Systems

General Purpose Circuits

Compatible systems

UL 489 compliant systems Industrial control panels Power distribution systems

Also known as

Siemens 5SJ4340-7HG42 breaker 3-pole 40A Siemens breaker Siemens C-curve 480V breaker

Replaces / compatible with

This circuit breaker is designed to replace older Siemens circuit breakers with similar specifications within the 5SJ4 series or compatible applications.

Technical note

Expert tip

The UL 489-480Y/277V rating indicates its compliance for use in North American electrical distribution systems operating at these voltages.

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Frequently asked questions

What are the typical applications for the Siemens 5SJ4340-7HG42 circuit breaker?

The Siemens 5SJ4340-7HG42 is suitable for general power distribution, motor circuits, and industrial loads that require a C-curve tripping characteristic to handle moderate inrush currents, protecting against overloads and short circuits.