Expedited shipping available at checkout

Siemens BQ2B110 Molded Case Circuit Breaker

Name: Siemens BQ2B110 - 110A 2 Pole Molded Case Circuit Breaker
Brand: Siemens
SKU: BQ2B110
Price: 175.42 USD
Availability: InStock
Rating: 4.9 (74 reviews)

110A
2 Pole
Bolt-On

Siemens BQ2B110

Molded Case Circuit Breaker

Brand Siemens

SKU BQ2B110

Select Item Condition

Earn 175 SuperPoints

110A
2 Pole
Bolt-On

New New

$175.42

In Stock

Quantity

Bulk Pricing

Send your parts list for a volume quote.

Request Pricing

Siemens BQ2B110 - 110A 2 Pole Molded Case Circuit Breaker

New

$175.42

In Stock

Quantity

Description Specifications Product FAQs SuperClub Warranties Shipping Reviews 4.9 (74)

Description

Built for circuit protection, the Siemens BQ2B110 molded case circuit breaker provides long-time and instantaneous protection through its LI trip function. It is rated 110A at 120/240VAC and has 2 poles. This BQ series breaker has a load side lug terminal connection. The trip function interrupts current in the circuit in response to overloads or short circuits.

Specifications

Key specifications
Brand	Siemens
Part Number	BQ2B110
Series	BQ
Amperage	110A
Poles	2
Mounting Style	Bolt-On
Voltage	120/240VAC
Phase	1
AIC Rating	10kA @ 120/240VAC

Fit and installation
Frame Type	BQ
Terminal Type	Lugs
For Use With	Siemens Panelboards and Loadcenters

Protection and operation
Trip Technology	Thermal Magnetic
Trip Function Code	LI
Trip Function	Long-Time, Instantaneous
Trip Adjustability	Fixed Thermal, Fixed Magnetic

Standards and features
Available Options	Padlock Attachment
Standards	CSA C22.2 No. 5, UL 489
Approval	CSA, HACR, UL
Temp Rating	40C
Construction Features	HACR Rated

Product FAQs

6 answers

How should I use the Siemens BQ2B110's 110A rating when selecting a breaker?

The 110A rating is the breaker's rated current. Use it when coordinating the circuit's load requirements, conductor ampacity and overcurrent protection.

What circuit configuration is the BQ2B110 rated for?

The breaker is rated 120/240VAC, with 2 poles for a single-phase circuit. Use these ratings to select it for the circuit's voltage and number of protected conductors.

How do I check whether its interrupting rating is adequate?

Its interrupting rating is 10kAIC at 120/240VAC. The available fault current at the installation point must not exceed that rating.

How does its thermal-magnetic trip work, and can I adjust it?

The thermal element responds to sustained overloads, while the magnetic element responds to short-circuit currents. Both are fixed, so select the breaker for the required protection rather than relying on field adjustment.

How are outgoing circuit conductors connected?

Outgoing circuit conductors terminate at load-side lugs. Plan conductor routing so the load wiring reaches those termination points.

Why does UL approval matter when selecting this breaker?

UL approval indicates evaluation against applicable safety requirements. Use this approval when checking the project's product certification requirements.

SuperClub

Warranties

Get a Quote

Shipping

Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

Read our full shipping policy

Same Day Shipping

We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.

Expedited Shipments

Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.

International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

Reviews

4.9

Rated 4.9 out of 5 stars

Based on 74 reviews

Reviews Summary

Customers say these breakers arrive quickly and fit perfectly for their electrical needs. Fast shipping and competitive pricing are frequently mentioned, with many users appreciating the availability of hard-to-find and older-style breakers. The products are well-packaged and arrive in good condition. Most customers report successful installations and reliable performance. A few note missing items from orders or concerns about product condition, though the majority express satisfaction with their purchases and indicate they would order again.

74 reviews

Sort

DV
David V. O.
Verified Buyer
Reviewing
Siemens BQ3B030H - 30A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
10/3/26
Electrician
Came
fast
Was this helpful?
HS
Hector S.
Verified Buyer
Reviewing
Siemens BQ3B100H - 100A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
9/27/26
Perfect replacement
Fit perfectly and good price
Was this helpful?
AF
Anthony F.
Verified Buyer
Reviewing
Siemens BQ2B020 - 20A 2 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
9/25/26
works as expected
works as expected
Was this helpful?
MS
Mike S.
Verified Buyer
Reviewing
Eaton / Cutler-Hammer BQ250250 - 50/50A Quadplex Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/12/26
Electrical company
Breaker worked awesome thank you very much
Was this helpful?
PE
Philip E.
Verified Buyer
Reviewing
Siemens BQ3B020 - 20A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/10/26
Siemens BQ3B020
The breaker arrived as described and on time. It works as expected. I will order from SuperBreakers again in the future without hesitation.
Was this helpful?