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

SIEMENS QF240A Q Series Plug-In Miniature Circuit Breaker - Q Series, Plug-In Siemens Miniature Circuit Breakers
SIEMENSQ Series, Plug-In Siemens Miniature Circuit Breakers

SIEMENS QF240A Q Series Plug-In Miniature Circuit Breaker

The Siemens QF240A is a Q Series, plug-in miniature circuit breaker rated for 40 A at 120/240V AC, with 2 poles and a 10kA interrupting capacity at 120V AC. It is designed for use in Siemens Load Centers and features…

SKU 3G-OTH-622288

Brand
SIEMENS
Item
QF240A Q Series Plug-In Miniature Circuit Breaker
Category
Q Series, Plug-In 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
QF240A
AC
120/240V
Poles
2

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 QF240A is a Q Series, plug-in miniature circuit breaker rated for 40 A at 120/240V AC, with 2 poles and a 10kA interrupting capacity at 120V AC. It is designed for use in Siemens Load Centers and features a single-pole configuration with a QF type designation.

Frequently Asked Questions

What is the Siemens QF240A miniature circuit breaker used for?

The Siemens QF240A is a Q Series plug-in miniature circuit breaker used to protect branch circuits in Siemens Load Centers. It provides overcurrent and short-circuit protection for residential and light commercial electrical systems, rated for 40 A at 120/240V AC with a 10kA interrupting capacity.

What are the specifications of the Siemens QF240A?

The Siemens QF240A is a 2-pole miniature circuit breaker rated 40 A at 120/240V AC, with a 10kA interrupting capacity at 120V AC. It features a single-pole configuration, QF type designation, and is designed for plug-in installation in Siemens Load Centers.

Where to buy the Siemens QF240A worldwide?

3G Electric supplies the Siemens QF240A 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 for pricing and lead time on this genuine Siemens part.

How to install the Siemens QF240A in a load center?

To install the Siemens QF240A, ensure the load center is de-energized. Align the breaker's plug-in tabs with the bus bar slots and press firmly until it snaps into place. Verify the breaker is fully seated and the handle operates freely. Always follow local electrical codes and Siemens installation instructions.

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 q series, plug-in 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
Single-pole plug-in miniature circuit breaker rated 20 A at 120V AC, designed for High Intensity Discharge lighting circuits. Provides overcurrent protection for HID ballast loads in commercial and industrial lighting applications. Suitable for use in Siemens EQ Load Centers
SIEMENS
Single-pole plug-in miniature circuit breaker rated 20 A at 120V AC, designed for High Intensity Discharge lighting circuits. Provides overcurrent protection for HID ballast loads in commercial and industrial lighting applications. Suitable for use in Siemens EQ Load Centers
Single-pole miniature circuit breaker rated 15 A at 120V AC. Provides overcurrent protection for branch circuits in residential and commercial load centers. Plug-in design for Siemens Q Series panelboards
SIEMENS
Single-pole miniature circuit breaker rated 15 A at 120V AC. Provides overcurrent protection for branch circuits in residential and commercial load centers. Plug-in design for Siemens Q Series panelboards
The SIEMENS Q260 is a 2-pole miniature circuit breaker rated 60 A at 120/240V AC, designed for plug-in installation in Siemens EQ Load Centers. It provides overcurrent protection for branch circuits against overloads and short circuits in residential and commercial electrical panels
SIEMENS
The SIEMENS Q260 is a 2-pole miniature circuit breaker rated 60 A at 120/240V AC, designed for plug-in installation in Siemens EQ Load Centers. It provides overcurrent protection for branch circuits against overloads and short circuits in residential and commercial electrical panels
The SIEMENS Q240 is a 40 A, 2-pole miniature circuit breaker for 120/240V AC systems. It provides overcurrent protection in plug-in format for load centers. Suitable for branch circuit protection in residential and light commercial applications
SIEMENS
The SIEMENS Q240 is a 40 A, 2-pole miniature circuit breaker for 120/240V AC systems. It provides overcurrent protection in plug-in format for load centers. Suitable for branch circuit protection in residential and light commercial applications
Three-pole miniature circuit breaker rated 40 A at 240V AC, designed for plug-in installation in load centers. Provides overcurrent protection for branch circuits in electrical distribution systems. Type Std, interrupting capacity 10 kA at 120V AC
SIEMENS
Three-pole miniature circuit breaker rated 40 A at 240V AC, designed for plug-in installation in load centers. Provides overcurrent protection for branch circuits in electrical distribution systems. Type Std, interrupting capacity 10 kA at 120V AC
The SIEMENS Q270 is a 70 amp, 2-pole miniature circuit breaker rated for 120/240V AC. It is a plug-in type breaker designed for overcurrent protection in branch circuits. Typical applications include residential and light commercial electrical systems where reliable circuit interruption is required
SIEMENS
The SIEMENS Q270 is a 70 amp, 2-pole miniature circuit breaker rated for 120/240V AC. It is a plug-in type breaker designed for overcurrent protection in branch circuits. Typical applications include residential and light commercial electrical systems where reliable circuit interruption is required
Two-pole miniature circuit breaker rated 50 A at 120/240V AC. Part of the Q Series with a plug-in design for use in compatible load centers. Provides overcurrent protection in residential and light commercial electrical distribution panels
SIEMENS
Two-pole miniature circuit breaker rated 50 A at 120/240V AC. Part of the Q Series with a plug-in design for use in compatible load centers. Provides overcurrent protection in residential and light commercial electrical distribution panels
3-pole plug-in miniature circuit breaker rated 15 A at 240V AC. Standard type for overcurrent protection in branch circuits. Suitable for use in compatible load centers
SIEMENS
3-pole plug-in miniature circuit breaker rated 15 A at 240V AC. Standard type for overcurrent protection in branch circuits. Suitable for use in compatible load centers