Siemens BQD Series

The Siemens BQD Series is a group of molded case circuit breakers offered in 1 , 2 , or 3 pole configurations. Ampere ratings run from about 15 A up to 100 A at 120 , 240 , 277 , or 480/277 V AC and also support certain DC voltages. The BQD Series includes variants like BQD6/CQD6 (CSA only versions) with higher voltage capacities. These breakers are designed for OEM equipment, panelboards, and industrial control systems. Typical applications include protection of lighting circuits, motors, branch circuits, reverse feed scenarios, and switchboards in commercial and light industrial plants

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Browse BQD Series

Browse available units in our catalog of BQD Series.

BQD225

This circuit breaker operates with a 14 kA interrupt rating at 480 VAC, ensuring effective protection against electrical faults. It features two poles and utilizes a thermal magnetic protection method

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BQD390

Focused on efficiency, the BQD390 serves in a 100 Amp frame capacity while accommodating a 14 kA interrupting rating. This model includes three poles and is suitable for applications within the 50/60

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BQD335

This circuit breaker supports an interrupting rating of 14 kAIC and is suitable for low tab connections. It is certified by UL and CSA for safety and can operate effectively in temperatures ranging fr

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BQD245

The BQD245 features two poles for single-phase operations, supporting trip functions for both long-time and instantaneous responses. Its interrupt rating of 14 kAIC at 480 VAC adds resilience against

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BQD290

With two poles, the BQD290 functions within a frequency range of 50 to 60 Hz. It is designed for panel mounting and is finished in a black color. This device can be installed at altitudes up to 1000 m

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BQD270

The BQD270 features two poles and employs a thermal magnetic trip mechanism for reliable protection. Its interrupting capacity is rated at 14 kA at 480 V AC. It can function in environments with up to

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