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SIEMENS Miniature Circuit Breaker: 45 A Amps, 240V AC, 3 Poles - B Series, Bolt-On Siemens Miniature Circuit Breakers
SIEMENSB Series, Bolt-On Siemens Miniature Circuit Breakers

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

The Siemens B345 is a 45 A, 240V AC, three-pole miniature circuit breaker from the BL Series, designed for bolt-on use with Siemens P1 Panelboards. It has a maximum AIR rating of 10kA at 240V AC and is classified as…

SKU 3G-OTH-722081

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

SIEMENS
Manufacturer Part Number
B345
Series
BL
Type
Std
AC
240V
Amps
45 A
Phase
Three
Poles
3
For Use With
Siemens P1 Panelboards
Max. AIR Rating
10kA at 240V AC
AC Voltage Rating
240V AC
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SIEMENS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens B345 is a 45 A, 240V AC, three-pole miniature circuit breaker from the BL Series, designed for bolt-on use with Siemens P1 Panelboards. It has a maximum AIR rating of 10kA at 240V AC and is classified as a standard type breaker.

Frequently Asked Questions

What is the Siemens B345 miniature circuit breaker used for?

The Siemens B345 is a 45 A, 240V AC, three-pole miniature circuit breaker designed for bolt-on use with Siemens P1 Panelboards. It provides overcurrent protection in commercial and industrial electrical distribution systems, typically in three-phase applications where reliable circuit interruption is required.

What are the specifications of the Siemens B345 circuit breaker?

The Siemens B345 is rated 45 A at 240V AC, three-phase, with three poles. It has a maximum AIR rating of 10kA at 240V AC and is part of the BL Series. This standard-type breaker is designed for bolt-on mounting in Siemens P1 Panelboards.

Where to buy the Siemens B345 circuit breaker worldwide?

3G Electric supplies the Siemens B345 miniature circuit breaker to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us to order this 45 A, 240V AC, three-pole breaker for your Siemens P1 Panelboard.

How to install the Siemens B345 circuit breaker?

Install the Siemens B345 by bolting it directly into a Siemens P1 Panelboard. Ensure the panel is de-energized before installation. Torque the terminal connections to manufacturer specifications and verify the 45 A rating matches your circuit load. Always follow local electrical codes and use qualified personnel.

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 b 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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