Siemens Q Series

The Siemens Series Q is a line of thermal magnetic circuit breakers used for protecting electrical circuits from overloads and short circuits. It includes Standard single pole, double pole, common trip, and plug in models rated around 120/240 VAC, with amperages from about 15A up to 50 100A and interrupting ratings around 10 kA. These breakers are used in residential and light commercial load centres for circuits that feed lighting, outlets, heating, refrigeration and air conditioning. They serve in panelboards and meter combo enclosures to ensure safe distribution of power in industrial facilities, homes and commercial buildings.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.

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Browse Q Series

Browse available units in our catalog of Q Series.

QS2225H

This breaker is equipped with thermal-magnetic protection and has a UL listing, ensuring compliance with safety standards. It is compatible with QS loadcenters and has an interrupting capacity of 22 k

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QSH2200

This dual-pole circuit breaker is rated for a 42 KAIC interrupt capacity at 240 V and functions with both long-time and instantaneous trips. Designed for single-phase applications, the QSH2200 operate

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Q220AFC

This circuit interruptor includes a thermal magnetic trip unit, which allows for detection of parallel arcing faults. It possesses an interrupt rating of 10 kA at 240 Volts AC. The device is suitable

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Q2225B

This device features two poles and offers a thermal magnetic protection method. Designed to be mounted via a plug-on mechanism, the circuit breaker operates effectively up to an installation altitude

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Q230EG

As a GFCI circuit breaker, this model includes a trip range of 30 mA and a robust interrupt rating of 10 KAIC. Its operational temperature range lies between 0°C and 40°C, making it versatile for vari

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QF250A

This circuit breaker is engineered for 1-phase systems, with a rated voltage of 240 Volts AC. It includes a thermal magnetic trip unit for reliable operation. The QF250A has a 10,000 Amp interrupting

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QN2175

This molded case circuit breaker features two poles and a rated voltage of 240 V. The unit has an interrupt rating of 10 KA at 240 VAC and is designed for a frequency range of 50 to 60 Hz. Featuring a

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QN2175H

This breaker features two poles and has a continuous current rated value of 150 A. Capable of interrupting currents up to 22 kA, it is designed to handle voltages of 240 V between both phase-to-ground

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Q29000S01

Featuring two poles, the Q29000S01 thermal magnetic circuit breaker has an AIC rating of 10 kA. It operates effectively in humid conditions, with a maximum humidity of 80% without condensation. This u

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Q3100H

This model is equipped with three poles and has a reliable thermal magnetic trip type. It possesses an interrupting rating of 22 kA at 240 VAC, ensuring effective protection against overloads. This pl

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