Siemens HQS2125H Molded Case Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Quantity
Siemens HQS2125H - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the trusted QS frame family, this 125A molded case circuit breaker delivers high-capacity 100kAIC protection for 120/240VAC electrical systems. It utilizes reliable thermal-magnetic trip technology with fixed long-time and instantaneous functions to defend against severe overcurrent events. Designed for modular metering applications, it plugs into Siemens Power Mod and Murray meter stacks. This HACR-rated component also serves as a direct substitute for the discontinued MDH2125.Specifications
| Brand | Siemens |
|---|---|
| Series | HQS |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Power Mod Meter Stacks, Murray Meter Stacks |
| Wire Gauge | 3 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 3 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, Non-Interchangeable Trip, HACR Rated |
Product FAQs
5 answersCan the HQS2125H replace older Murray circuit breakers?
Yes, this breaker serves as a direct, modern substitute for the discontinued Murray MDH2125.
Can the HQS2125H be used as a tenant main breaker?
Yes, QS frame breakers are commonly utilized as dedicated tenant main breakers in multi-family residential and commercial modular metering applications.
Is the HQS2125H suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for protecting heating, air conditioning, and refrigeration equipment.
Does this breaker provide GFCI or AFCI protection?
No, the HQS2125H is a standard thermal-magnetic breaker. It provides reliable overcurrent and short-circuit protection but does not include ground fault (GFCI) or arc fault (AFCI) functions.
Are there lower interrupting capacity versions of this breaker available?
Yes, if your electrical system does not require a 100kAIC rating, the Siemens QS frame family includes lower-rated alternatives such as the QS2125 (10kAIC) and QSH2125 (22kAIC).
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