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Siemens 5SK9011-1KK26 1-Pole Auxiliary Circuit Breaker — 4A

Siemens 5SK9011-1KK26 Auxiliary Circuit Breaker

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ManufacturerSiemens

Part number5SK9011-1KK26

Poles 1

Current 4A

Feature Short-Circuit Release

Application Auxiliary Circuits

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CAGE: 9NK75

Single-Pole Design Short-Circuit Protection 4A Rating Auxiliary Circuit Application Compact Size Reliable Performance

Product description

The Siemens 5SK9011-1KK26 is a single-pole circuit breaker specifically designed for auxiliary circuits. It features a short-circuit release mechanism, providing essential protection against sudden surges in current. This breaker is rated for 4A, making it suitable for lower current applications where precise control and protection are necessary.

This type of breaker is commonly used in control panels, automation systems, and machinery to protect auxiliary circuits, such as control power, signaling, and instrumentation lines. It ensures the reliability of control functions by isolating faults without disrupting the main power circuits.

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Technical specifications

Poles	1
Current	4A
Feature	Short-Circuit Release
Application	Auxiliary Circuits
Manufacturer	Siemens
Series	5SK9

Common applications

Control Panel Wiring

Automation Systems

Instrumentation Circuits

Signaling Systems

Low Current Protection

PLC Auxiliary Power

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SK90111KK26 Siemens Auxiliary Breaker 4A

Replaces / compatible with

Designed for protecting auxiliary circuits where standard MCBs may not be suitable.

Technical note

Expert tip

This breaker is intended for auxiliary circuits only and should not be used for main power distribution or as a primary overcurrent protection device for loads with significant inrush current.

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Frequently asked questions

What is the primary function of the Siemens 5SK9011-1KK26?

The Siemens 5SK9011-1KK26 is a single-pole circuit breaker designed specifically for protecting auxiliary circuits. Its key feature is the short-circuit release, which safeguards these lower-power control and signaling paths from sudden overcurrents.