3WL air circuit breakers

Reliable, versatile, and perfectly integrated

Every power supply depends upon a reliable infeed of electricity. 3WL air circuit breakers reliably protect electrical installations against damage or fire as a result of short circuits, ground faults, or overload faults.

Find the right air circuit breaker

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Heart of the electrical power distribution

3WL air circuit breakers are used as incoming-feeder, coupler, and outgoing-feeder circuit breakers in electrical systems in industry, buildings, and infrastructure applications. They have communications capability and can be easily integrated into higher-level control and energy management systems.
Maintenance and retrofitting of the 3WL circuit breaker is easy and can be done in few steps. See for yourself.

Video tutorial

powerconfig configuration software

Configure your 3WL air circuit breaker

3WL configurator


A broad product range

3WL air circuit breakers are available in four sizes, each featuring a 3- and 4-pole design, and cover a power range from 630 A to 6,300 A. The modular portfolio offers flexibility and provides for easy assembly and subsequent adjustment.

3WL air circuit breakers – versatile and flexible

  • Five power levels of the short-circuit breaking capacity for all applications
  • Available as circuit breakers and non-automatic circuit breakers in an AC version
  • Available as a circuit breaker in a DC version
  • Modules can be specially retrofitted for electronic trip units
  • Different connection technologies
  • Connection option of external input and output modules
  • High security standards thanks to hardware protection and signed firmware
All the essentials on 3WL air circuit breakers at a glance

Quick Selection Guide

3WL10 air circuit breakers – economical and intelligent

3WL air circuit breakers are now also available in a particularly compact size of 0 to 1,250 A. The communications-capable switches minimize the space requirements in the switchgear. With individual electronic trip units, comprehensive internal and external accessories, and a variety of connection technologies, these can be flexibly integrated into switch boards in accordance with IEC61439-2 and incorporated into higher-level energy management systems via communications modules.

3WL air circuit breakers – your benefits at a glance

  • Increased flexibility due to the modular portfolio
  • Increased plant availability and power transparency thanks to functions for communication and energy data acquisition
  • Long service life of equipment thanks to easy replacement of main contact elements and individual arc chutes
  • Efficient operation through the provision of energy data and ready-to-close indicator
  • Consistent, end-to-end communication capability
  • Compliance with worldwide IEC & UL standards
  • Product proven worldwide
Downloads and Support

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Here you will find important information, documents, and addresses relating to low-voltage power distribution and electrical installation technology.

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Protection against short circuit, ground fault, and overload

Whether motors, capacitors, transformers, busbars, or cables – 3WL air circuit breakers reliably and efficiently protect electrical installations against damage or fire. Discover our portfolio. 

Find the right air circuit breaker

Siemens Industry Mall