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SIEMENS Miniature Circuit Breaker: 45 A Amps, 120/240V AC, 2 Poles - BQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers
SIEMENSBQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers

SIEMENS Miniature Circuit Breaker: 45 A Amps, 120/240V AC, 2 Poles

The Siemens BQ2B045 is a BQ Series miniature circuit breaker, bolt-on type, rated 45 A at 120/240V AC with 2 poles and a 10kA interrupting capacity at 120/240V AC. Designed for use in Siemens panelboards, this…

SKU 3G-OTH-623703

Brand
SIEMENS
Item
Miniature Circuit Breaker: 45 A Amps, 120/240V AC, 2 Poles
Category
BQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers
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Technical Specifications

SIEMENS
Manufacturer Part Number
BQ2B045
Type
Std
AC
120/240V
Poles
2
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SIEMENS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens BQ2B045 is a BQ Series miniature circuit breaker, bolt-on type, rated 45 A at 120/240V AC with 2 poles and a 10kA interrupting capacity at 120/240V AC. Designed for use in Siemens panelboards, this Std-type breaker features single-pole construction and is part of the BQ & BQH family. 3G Electric interprets demand and delivers this genuine Siemens component across 14 industrial departments, with specialist depth in electrical controls.

Frequently Asked Questions

What is the Siemens BQ2B045 miniature circuit breaker used for?

The Siemens BQ2B045 is a bolt-on miniature circuit breaker rated 45 A at 120/240V AC, used to protect branch circuits in Siemens panelboards. It is common in commercial and industrial electrical distribution systems where overcurrent protection and reliable interruption up to 10kA are required.

What are the specifications of the Siemens BQ2B045?

The Siemens BQ2B045 is a 2-pole, Std-type miniature circuit breaker rated 45 A at 120/240V AC with a 10kA interrupting capacity at 120/240V AC. It is part of the BQ series, designed for bolt-on mounting in Siemens panelboards, and features single-pole construction per pole.

Where to buy the Siemens BQ2B045 worldwide?

3G Electric supplies the genuine Siemens BQ2B045 miniature circuit breaker to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us to order this component for your electrical distribution needs.

How to install the Siemens BQ2B045 in a panelboard?

The Siemens BQ2B045 is a bolt-on breaker designed for Siemens panelboards. Ensure the panel is de-energized, then align the breaker with the bus stabs and tighten the bolt securely. Follow Siemens installation instructions and local electrical codes for proper torque and wiring.

Used in

Common applications for SIEMENS
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

SIEMENS Products

3G Electric supplies SIEMENS bq & bqh series, bolt-on siemens miniature circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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