BQ3B040 - 40Amp Circuit Breaker
- 40 Amp
- 10k @ 240VAC
- 3 Pole
Purchase Options: Brand New
BQ3B040 - 40Amp Circuit Breaker Description
BQ3B040 - 40Amp Circuit Breaker
Secure your three-phase circuits with the Siemens BQ3B040, a 40-amp, 3-pole molded case circuit breaker designed for reliable branch circuit protection in commercial and industrial electrical systems. Part of the trusted Siemens Type BQ family, this common-trip breaker disconnects all three poles simultaneously if an overload or short circuit occurs, keeping your equipment safe and operations uninterrupted. Rated for 240VAC with a 10 kA interrupting capacity (10kAIC), it fits neatly into compatible panelboards, and the included load-side lugs simplify installation. Ideal for motor circuits, HVAC systems, control panels, and other 240-volt three-phase applications, the BQ3B040 delivers dependable protection that integrates seamlessly with legacy Siemens systems.
Key Features and Benefits
- 40 amp, 3-pole molded case circuit breaker
- Common-trip design for simultaneous pole protection
- Rated for 240VAC systems
- 10 kA interrupting capacity (10kAIC)
- Bolt-on mounting for a secure panel connection
- Load-side lugs included for simpler wiring
- Designed for branch circuit protection in commercial and industrial environments
- Compatible with legacy Siemens Type BQ panelboards
Technical Specifications
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Manufacturer: Siemens
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Catalog Number: BQ3B040
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Number of Poles: 3
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Voltage Rating: 240 VAC
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Amperage Rating: 40 Amps
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Interrupting Rating: 10 kAIC
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Trip Type: Common Trip
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Mounting Type: Bolt-On
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Electrical Connection Type: Bolt-On
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Dimensions: 4 in. D × 3 in. W × 3 in. H
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Net Weight: 1.014 lb
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Country of Origin: Mexico
Material Compliance and Certifications
- UL 489 Listed
- Built to Siemens standards for low-voltage electrical distribution
- Active product lifecycle
Where It Works Best
- Perfect for commercial buildings, factories, schools, warehouses, and other facilities where three-phase branch circuit protection is required.
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
Siemens®, I-T-E®, and Murray® are registered trademarks of Siemens AG. Products sold are surplus, used, or refurbished and are NOT supplied by Siemens AG or its affiliates.
Specifications
- Width:3.0
- Height:4.0
- Depth:3.5
- Poles:3
- Amperes:40
- A.I.C. Rating & Volts:10k @ 240VAC
- Type:BQ
- Approx Dimensions:3.00"W x 4.00"L x 3.50"D
- Additional Notes:HACR rated, Bolt-on Molded Case Circuit Breaker, 40°C
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
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