Siemens Q2125BH Miniature Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Siemens
Q2125BH
Miniature Circuit Breaker
Brand
Siemens
SKU
Q2125BH
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens Q2125BH - 125A 2 Pole Miniature Circuit Breaker
New
Quantity
Similar Items
100A 2 Pole Miniature Circuit Breaker
70A 2 Pole Miniature Circuit Breaker
40A 2 Pole Miniature Circuit Breaker
Description
Part of the QPH series, the Siemens Q2125BH is a 2-pole, 125A miniature circuit breaker designed for residential and commercial applications. It provides essential thermal-magnetic protection for electrical distribution systems. This plug-on breaker mounts into Siemens, Murray, EQ, PL, and ES load centers. It serves as a direct replacement for the legacy MP2125H, ensuring seamless panel upgrades. Rated at 22kAIC, it features a common trip mechanism and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q2125BH |
| Series | QPH |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Murray Load Centers, EQ Load Centers, PL Load Centers, ES Load Centers, Ultimate Load Centers |
| Wire Gauge | 2 AWG - 1/0 AWG (Cu), 1/0 AWG - 2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 2 AWG (Cu), 1/0 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
7 answersWhat load centers are compatible with the Siemens Q2125BH?
The Q2125BH is designed for use in Siemens EQ, PL, ES, and Ultimate series load centers. It is also fully compatible with Murray load centers.
Can I install the Q2125BH in a GE or Eaton load center?
No. The Q2125BH is not UL listed or designed for use in GE, Eaton, or Square D panels. It should only be installed in compatible Siemens or Murray load centers to maintain safety standards and panel certifications.
Can the Q2125BH replace older Murray or ITE breakers?
Yes. Siemens acquired Murray and ITE, and the Q2125BH is an exact substitute for discontinued 125A, 2-pole, 22kAIC plug-on breakers of the same frame size, such as the Murray MP2125H. It is ideal for servicing older panels.
How many panel spaces does the Q2125BH require?
As a 2-pole QP-frame breaker, the Q2125BH requires two standard 1-inch panel spaces (2 inches total) in a compatible load center.
What does the H in the Q2125BH part number indicate?
The H indicates a high interrupting rating. While standard QP breakers typically have a 10kAIC rating, the Q2125BH is rated for 22kAIC at 240V, providing enhanced protection against severe short circuits.
Does the Q2125BH require a hold-down kit when used as a main breaker?
Yes. When installed as a back-fed main breaker in a load center, the National Electrical Code (NEC) requires it to be secured with a breaker hold-down kit, such as the Siemens ECMBR2, to prevent it from being accidentally dislodged.
Does the Q2125BH provide GFCI or AFCI protection?
No. The Q2125BH is a standard thermal-magnetic circuit breaker that provides overload and short-circuit protection. It does not include Ground Fault Circuit Interrupter (GFCI) or Arc Fault Circuit Interrupter (AFCI) functions.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
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.
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.