Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
SIEMENS BQ3B045H BQH Series 45A 3-Pole 240V AC High Interrupting - BQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers
SIEMENSBQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers

SIEMENS BQ3B045H BQH Series 45A 3-Pole 240V AC High Interrupting

The Siemens BQH Series BQ3B045H is a 45 A, 240V AC, three-pole miniature circuit breaker with high interrupting capacity (22kA at 240V AC). Designed for bolt-on installation in Siemens panelboards, this BQ & BQH…

SKU 3G-OTH-623739

Brand
SIEMENS
Item
BQ3B045H BQH Series 45A 3-Pole 240V AC High Interrupting
Part Number
BQ3B045H
Category
BQ & BQH Series, Bolt-On Siemens Miniature Circuit Breakers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

SIEMENS
Manufacturer Part Number
BQ3B045H
Type
High Interrupting Capacity
AC
240V
Poles
3

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

SIEMENS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens BQH Series BQ3B045H is a 45 A, 240V AC, three-pole miniature circuit breaker with high interrupting capacity (22kA at 240V AC). Designed for bolt-on installation in Siemens panelboards, this BQ & BQH Series breaker provides overcurrent protection for industrial electrical distribution systems.

Frequently Asked Questions

What is the Siemens BQ3B045H miniature circuit breaker used for?

The Siemens BQ3B045H is a 45 A, 240V AC, three-pole miniature circuit breaker with high interrupting capacity (22kA at 240V AC). It provides overcurrent protection in industrial electrical distribution systems and is designed for bolt-on installation in Siemens panelboards.

What are the specifications of the Siemens BQ3B045H?

The Siemens BQ3B045H is rated 45 A at 240V AC, three poles, with a high interrupting capacity of 22kA at 240V AC. It is part of the BQH Series and designed for bolt-on installation in Siemens panelboards. The manufacturer part number is BQ3B045H.

Where to buy the Siemens BQ3B045H worldwide?

3G Electric supplies the Siemens BQ3B045H miniature circuit breaker to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this BQH Series breaker.

How to install the Siemens BQ3B045H in a panelboard?

The Siemens BQ3B045H is a bolt-on type breaker designed for installation in Siemens panelboards. Ensure the panel is de-energized, align the breaker with the bus bar, and torque the bolt to the manufacturer's specification. Always follow Siemens installation instructions and local electrical codes.

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
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from SIEMENS

View all SIEMENS parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first