We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

SIEMENS BQD345 Miniature Circuit Breaker, 45A, 480V AC, 3-Pole, Bolt-On - BQD Series, Bolt-On Siemens Miniature Circuit Breakers
SIEMENSBQD Series, Bolt-On Siemens Miniature Circuit Breakers

SIEMENS BQD345 Miniature Circuit Breaker, 45A, 480V AC, 3-Pole, Bolt-On

The Siemens BQD Series Miniature Circuit Breaker (MPN BQD345) is a 45 A, 480V AC, three-pole bolt-on breaker with a 14kA interrupting capacity at 480V AC, designed for use in Siemens P1 Panelboards. 3G Electric…

SKU 3G-OTH-725643

Also listed as: BQD 345 · BQD-345

Brand
SIEMENS
Item
BQD345 Miniature Circuit Breaker, 45A, 480V AC, 3-Pole, Bolt-On
Category
BQD 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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SIEMENS
Manufacturer Part Number
BQD345
Type
Std
AC
480V
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 BQD Series Miniature Circuit Breaker (MPN BQD345) is a 45 A, 480V AC, three-pole bolt-on breaker with a 14kA interrupting capacity at 480V AC, designed for use in Siemens P1 Panelboards. 3G Electric interprets your demand for this standard-type breaker, sources it as an authorized distributor, and supports your procurement across 14 industrial departments — with specialist depth in electrical controls alongside combustion, pumps, and more.

Frequently Asked Questions

What is the Siemens BQD345 miniature circuit breaker used for?

The Siemens BQD345 is a 45 A, 480V AC, three-pole bolt-on miniature circuit breaker used for overcurrent protection in Siemens P1 Panelboards. It is common in industrial electrical distribution systems where reliable branch circuit protection is required.

What are the specifications of the Siemens BQD345 circuit breaker?

The Siemens BQD345 is rated 45 A at 480V AC, three poles, with a 14kA interrupting capacity at 480V AC. It is a standard-type bolt-on breaker designed for Siemens P1 Panelboards. The manufacturer part number is BQD345.

Where to buy the Siemens BQD345 circuit breaker worldwide?

3G Electric supplies the Siemens BQD345 miniature circuit breaker worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this breaker to your facility. Contact us to order the BQD345 for your electrical panel needs.

How to install the Siemens BQD345 circuit breaker?

Install the Siemens BQD345 by bolting it into a compatible Siemens P1 Panelboard. Ensure the breaker is in the OFF position, align it with the bus bars, and torque the terminal screws to manufacturer specifications. Always de-energize the panel before installation and follow 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

SIEMENS Products

3G Electric supplies SIEMENS bqd 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
The SIEMENS BQD1100 is a 100 A, single-pole miniature circuit breaker rated for 277V AC. It features a bolt-on connection and standard trip unit, providing overcurrent protection in branch circuits. Suitable for use in electrical distribution systems where compact, reliable circuit interruption is required
SIEMENS
The SIEMENS BQD1100 is a 100 A, single-pole miniature circuit breaker rated for 277V AC. It features a bolt-on connection and standard trip unit, providing overcurrent protection in branch circuits. Suitable for use in electrical distribution systems where compact, reliable circuit interruption is required
Single-pole bolt-on miniature circuit breaker rated 35 A at 277V AC. Provides overcurrent protection for branch circuits in electrical distribution systems. Suitable for use in panelboards requiring bolt-on mounting
SIEMENS
Single-pole bolt-on miniature circuit breaker rated 35 A at 277V AC. Provides overcurrent protection for branch circuits in electrical distribution systems. Suitable for use in panelboards requiring bolt-on mounting
Single-pole bolt-on miniature circuit breaker rated 40 A at 277V AC. Part of the BQD Series with a 14kA interrupting rating. Provides overcurrent protection for branch circuits in panelboards and electrical distribution systems
SIEMENS
Single-pole bolt-on miniature circuit breaker rated 40 A at 277V AC. Part of the BQD Series with a 14kA interrupting rating. Provides overcurrent protection for branch circuits in panelboards and electrical distribution systems
Single-pole bolt-on miniature circuit breaker rated 50 A at 277V AC. Provides overcurrent protection in branch circuits. Suitable for use in panelboards and electrical distribution systems
SIEMENS
Single-pole bolt-on miniature circuit breaker rated 50 A at 277V AC. Provides overcurrent protection in branch circuits. Suitable for use in panelboards and electrical distribution systems
Miniature Circuit Breaker: 35 A Amps, 480V AC, 2 Poles, Std (MPN BQD235)
SIEMENS
Miniature Circuit Breaker: 35 A Amps, 480V AC, 2 Poles, Std (MPN BQD235)
Miniature Circuit Breaker: 50 A Amps, 480V AC, 2 Poles, Std (MPN BQD250)
SIEMENS
Miniature Circuit Breaker: 50 A Amps, 480V AC, 2 Poles, Std (MPN BQD250)
Miniature Circuit Breaker: 45 A Amps, 480V AC, 2 Poles, Std (MPN BQD245)
SIEMENS
Miniature Circuit Breaker: 45 A Amps, 480V AC, 2 Poles, Std (MPN BQD245)
Miniature Circuit Breaker: 80 A Amps, 480V AC, 2 Poles, Std (MPN BQD280)
SIEMENS
Miniature Circuit Breaker: 80 A Amps, 480V AC, 2 Poles, Std (MPN BQD280)