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Siemens Q2125H Miniature Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Siemens
Q2125H
Miniature Circuit Breaker
Brand
Siemens
SKU
Q2125H
Quantity
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Siemens Q2125H - 125A 2 Pole Miniature Circuit Breaker
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Description
Engineered for residential and commercial use, the Siemens Q2125H is a 2-pole, 125A miniature circuit breaker. It delivers dependable thermal-magnetic protection for modern electrical distribution networks. This plug-on unit mounts into Siemens, Murray, EQ, PL, ES, and Ultimate load centers. It is an exact substitute for the discontinued MP2125H, making it ideal for servicing older panels. Rated for 22kAIC at 120/240VAC, this HACR-rated breaker includes a common trip mechanism for safety.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q2125H |
| 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 | 8-2/0 AWG (Cu/Al) |
| Max Wire | 2/0 AWG |
| Min Wire | 8 AWG |
| 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 | HACR Rated, Common Trip |
Product FAQs
6 answersWhich load centers are compatible with the Siemens Q2125H?
It is designed for use in Siemens and Murray load centers, specifically fitting EQ, PL, ES, and Ultimate series panels.
How many panel spaces does the Q2125H require?
This 2-pole breaker requires two standard 1-inch spaces, taking up a total of 2 inches on the panel bus.
Is a hold-down kit required when using the Q2125H as a back-fed main?
Yes. When installed as a back-fed main breaker, NEC rules require a compatible hold-down kit, such as the ECMBR1 or ECMBR2, depending on your specific load center model.
Can the Q2125H replace legacy Murray circuit breakers?
Yes. Siemens QPH breakers are UL listed to replace legacy Murray MP-HT breakers. The Q2125H serves as a direct replacement for the Murray MP2125KH and MP2125H models.
What is the difference between the Siemens Q2125 and the Q2125H?
The H suffix indicates a higher interrupting rating. The standard Q2125 is rated at 10kAIC, while the Q2125H is rated at 22kAIC for applications requiring higher fault current protection.
Does the Q2125H include ground-fault or arc-fault protection?
No. This is a standard thermal-magnetic circuit breaker providing overload and short-circuit protection only. It does not feature GFCI or AFCI circuitry.
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