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SIEMENS Miniature Circuit Breaker: 45 A Amps, 240V AC, 3 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, 240V AC, 3 Poles

The Siemens BQ3B045 is a BQ Series miniature circuit breaker rated 45 A, 240V AC, 3-pole, with a 10kA interrupting capacity at 240V AC. Designed for use in Siemens panelboards, this bolt-on breaker provides…

SKU 3G-OTH-623742

Brand
SIEMENS
Item
Miniature Circuit Breaker: 45 A Amps, 240V AC, 3 Poles
Category
BQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers
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Technical Specifications

SIEMENS
Manufacturer Part Number
BQ3B045
Type
Std
AC
240V
Poles
3
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SIEMENS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens BQ3B045 is a BQ Series miniature circuit breaker rated 45 A, 240V AC, 3-pole, with a 10kA interrupting capacity at 240V AC. Designed for use in Siemens panelboards, this bolt-on breaker provides overcurrent protection in a compact, standard form factor.

Frequently Asked Questions

What is the Siemens BQ3B045 miniature circuit breaker used for?

The Siemens BQ3B045 is a 45 A, 240V AC, 3-pole miniature circuit breaker designed for overcurrent protection in Siemens panelboards. It is commonly used in commercial and industrial electrical distribution systems to protect branch circuits from overloads and short circuits.

What are the specifications of the Siemens BQ3B045?

The Siemens BQ3B045 is a BQ Series miniature circuit breaker rated 45 A at 240V AC, 3-pole, with a 10kA interrupting capacity at 240V AC. It is a bolt-on type designed for use in Siemens panelboards, providing reliable overcurrent protection in a compact form factor.

Where to buy the Siemens BQ3B045 worldwide?

3G Electric supplies the Siemens BQ3B045 miniature circuit breaker to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this genuine Siemens part for your project.

How to install the Siemens BQ3B045 circuit breaker?

Install the Siemens BQ3B045 by first ensuring the panelboard is de-energized. Securely bolt the breaker onto the Siemens panelboard bus bar, then connect the line and load conductors to the appropriate terminals. Always follow local electrical codes and the manufacturer's installation instructions for safe operation.

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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