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.

QN2150RH

This molded case circuit breaker consists of two poles and is equipped with a plug-in connection type. It offers long-time and instantaneous trip functionalities, ensuring reliable performance under f

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Q2150B

This circuit breaker features two poles with plug-on mounting for quick installation and efficient system integration. The interrupt rating is 10 kA at 240 V, ensuring it can handle substantial fault

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Q3100HH

Characterized by its 3-pole configuration, the Q3100HH is compatible with the QP frame type. It has an interrupt rating of 66 AIC at 240 V AC. The wire range spans from 8 AWG to 2/0 AWG, featuring cap

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Q380H

Capable of handling thermal-magnetic trips, this breaker has an interrupt rating of 22 AIC. It is engineered for 3-phase systems and is designed to connect using a plug-in molded connection. Its frame

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QN2175RH

The QN2175RH features a robust QN frame and includes two poles. It has an interrupt rating of 22 kA at 240 Volts AC and supports wire sizes ranging from 1 AWG to 300 kcmil. This breaker uses a plug-in

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QE240

This circuit breaker features a ground fault trip level set at approximately 30 mA and has an interrupt rating of 10 kAIC at 240 Volts AC. Designed for a plug-on mounting type, it utilizes a pigtail n

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QF240AH

This ground-fault circuit interrupter features two poles and is designed for single-phase applications. Its plug-in connection simplifies installation. Thermal magnetic protection offers both long-tim

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QN2150R

The QN2150R is suitable for a frequency of 50/60 Hz and comes equipped with two poles. It offers both long-time and instantaneous trip functions, providing essential protection mechanisms. Its design

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QS2100H

This circuit breaker operates within a thermal/magnetic trip type and is rated for 22 kA interrupt capacity. It utilizes a plug-in connection type, accommodating wire sizes from 3 AWG to 300 kcmil and

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Q2125B

This circuit breaker is engineered with two poles and designed for 1-phase operation. It features a durable Q frame and includes thermal magnetic protection with long-time and instantaneous trip funct

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