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SIEMENS BQD140 Miniature Circuit Breaker, 40A, 277V AC, 1-Pole, Std Type - BQD Series, Bolt-On Siemens Miniature Circuit Breakers
SIEMENSBQD Series, Bolt-On Siemens Miniature Circuit Breakers

SIEMENS BQD140 Miniature Circuit Breaker, 40A, 277V AC, 1-Pole, Std Type

The Siemens BQD Series Miniature Circuit Breaker (MPN BQD140) is a 40 A, 277V AC, single-pole, bolt-on unit with a 14kA interrupting rating at 277V AC. Designed for use in Siemens P1 Panelboards, this Std-type…

SKU 3G-OTH-725659

Also listed as: BQD 140 · BQD-140

Brand
SIEMENS
Item
BQD140 Miniature Circuit Breaker, 40A, 277V AC, 1-Pole, Std Type
Category
BQD Series, Bolt-On Siemens Miniature Circuit Breakers
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Technical Specifications

SIEMENS
Manufacturer Part Number
BQD140
Type
Std
AC
277V
Poles
1

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

Product Description

The Siemens BQD Series Miniature Circuit Breaker (MPN BQD140) is a 40 A, 277V AC, single-pole, bolt-on unit with a 14kA interrupting rating at 277V AC. Designed for use in Siemens P1 Panelboards, this Std-type breaker provides overcurrent protection in a compact 1-pole form factor.

Frequently Asked Questions

What is the Siemens BQD140 miniature circuit breaker used for?

The Siemens BQD140 provides overcurrent protection in electrical distribution systems. It is designed for use in Siemens P1 Panelboards, protecting branch circuits in commercial and industrial applications where a 40 A, 277V AC single-pole breaker is required.

What are the specifications of the Siemens BQD140 circuit breaker?

The Siemens BQD140 is a 40 A, 277V AC, single-pole, bolt-on miniature circuit breaker. It has a 14kA interrupting rating at 277V AC and is part of the BQD Series. It is designed for use in Siemens P1 Panelboards.

Where to buy the Siemens BQD140 circuit breaker worldwide?

3G Electric supplies the Siemens BQD140 miniature circuit breaker to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this genuine Siemens part.

How to install a Siemens BQD140 bolt-on circuit breaker?

Install the Siemens BQD140 by ensuring the panelboard is de-energized. Align the breaker's bolt-on tabs with the bus bar in a Siemens P1 Panelboard, tighten the mounting screw to the specified torque, and connect the load wire. Follow all 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.

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