Siemens BQ2B040 Miniature Circuit Breakers (MCBs)

120/240 VAC, 40 A, 10 kA Interrupt, 2-Pole, BQ-Frame, Load Lug Terminal, Bolt-On Mount, Thermal Magnetic, Common Trip, Molded Case Circuit Breaker

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MPN: BQ2B040

SKU:

UPC: 783643102439

Weight: 1.75 LBS

Minimum Purchase: 1 unit

Product Conditions

Surplus

Parts from another distributor or wholesaler that were only removed from the original packaging for inspection and pictures. These parts have never been energized, installed, or modified in any way.

Used

Parts that show any sign of being energized, installed, assembled with other parts, or functional wear or corrosion. These parts are sold as-is and returns may not be accepted.

Repackaged

Parts from another distributor or wholesaler that are missing the original packaging. These parts have never been energized, installed, or modified in any way and will ship in an ARCA box.

Learn More About Product Conditions

Disclaimer: Critical Surplus is not an authorized distributor, reseller or representative of any manufacturer, brand or product listed. All product names, trademarks, brands and logos are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder. All items sold by Critical Surplus are covered under Critical Surplus' warranty and not the manufacturer warranty.

Description

Siemens BQ2B040 Miniature Circuit Breakers (MCBs)

Technical Specifications

Manufacturer	Siemens BQ2B040 Miniature Circuit Breakers (MCBs)
Catalog Number	BQ2B040
Voltage Rating	120/240 VAC at 50/60 Hz (UL)
Type	Molded Case, Thermal and Fixed Magnetic Trip, Common Trip
Mounting	Bolt-On
Series	BQ
Terminal Type	Load Lug
Current Rating	40 A
Interrupting Rating	10 kA at 120/240 VAC Symmetrical (UL)
Catalog	SiemensAG_00876_1_5_5_18_5_24_CAT.pdf
Used On	P1/P2/P3/P4/P5 Panelboard
Wire Size	8 to 6 AWG (Copper), 8 to 4 AWG (Aluminum)
Size	2 Inch W x 3 Inch D x 3-3/4 Inch H
Number of Poles	2
Country of Origin	Mexico
Approval	UL 489, CSA C22.2

Condition & Warranty

This Siemens BQ2B040 Miniature Circuit Breakers (MCBs) is sold as surplus and sourced from trusted and verified channels. Units may arrive in non-retail packaging and may show minor storage-related cosmetic handling. 90-day limited replacement warranty included.

Shipping & Handling

Most orders ship within 1 business day with immediate tracking updates. Expedited shipping and freight support available. Choose Next Day Air at checkout or contact us for more information.

Why Buy from Critical Surplus?

Circular economy model: Responsible surplus sourcing.
Professional-grade inventory: Genuine components only.
Technical support: Help with compatibility and spec verification.
Bulk options: Multi-unit and pallet pricing available.

Siemens BQ2B040 Miniature Circuit Breakers (MCBs)

$37.05

Surplus – Unused Original Packaging

(NSB)

Parts from another distributor or wholesaler that were only removed from the original packaging for inspection and pictures. These parts have never been energized, installed, or modified in any way. They show no visible signs of use or damage and include all standard hardware and accessories. Original packaging may show shelf wear or be missing documentation.

Surplus – Unused Repackaged

(NNB)

Parts that are unused but missing original packaging. These ship in aftermarket packaging and may show light handling marks. Hardware, accessories, or documentation may be missing. Original manufacturer warranty may not apply.

Surplus – Minor Cosmetic Defect

(NWD)

Parts with cosmetic defects, missing non-critical components, or factory blemishes. These parts have not been installed or energized and remain fully functional. Defects do not impact certifications or performance.

Used – Good Condition

(USD)

Parts that show signs of previous use, cosmetic wear, or minor handling marks. Items are functional but may have missing accessories or documentation. Sold as-is unless otherwise noted.

Used – Poor Condition / For Parts

(SLV)

Parts that are damaged, incomplete, or non-functional. These items are not tested and are sold strictly for parts or repair. Returns are not accepted. Additional photos available upon request.

Siemens BQ2B040 Miniature Circuit Breakers (MCBs)