Siemens QS2125H Miniature Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Siemens
QS2125H
Miniature Circuit Breaker
Brand
Siemens
SKU
QS2125H
Quantity
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Siemens QS2125H - 125A 2 Pole Miniature Circuit Breaker
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Description
Designed for multi-family metering applications, the Siemens QS2125H is a 125A, two-pole miniature circuit breaker. It delivers robust thermal-magnetic protection for main tenant feeders. This plug-on unit installs into Siemens Power Mod meter stacks and Uni-PAK metering centers. It replaces legacy MPD2125KH and MDH125 breakers, ensuring seamless upgrades. The breaker includes load side lugs and supports reverse feed setups. Rated at 22 kAIC, it features an exclusive side-wired configuration.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QS2125H |
| Series | QS |
| 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 Power Mod Meter Stacks, Uni-PAK Metering |
| 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 |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker, HACR Rated, Side-wired, Non-Interchangeable Trip, Common Trip, Reverse Feed, High Interrupting Capacity |
Product FAQs
5 answersWhat metering equipment is compatible with the Siemens QS2125H?
This main breaker is designed for use in Siemens Power Mod meter stacks, Uni-PAK metering, and WMM or PAK multifamily metering lines. Its compact QS frame fits into the same space as a standard 100A QP breaker, eliminating the need for filler plates.
What is the difference between the Siemens QS2125 and the QS2125H?
The primary difference is the interrupting rating. The standard QS2125 has a 10 kA AIC rating, while the QS2125H features a higher 22 kA AIC rating at 120/240V. Both share the same physical dimensions and side-wired design.
What is the recommended tightening torque for the lugs on the QS2125H?
The wire binding screws on this breaker should be torqued to 250 lb-in. Always use 75 degree Celsius rated copper or aluminum conductors sized between 3 AWG and 300 kcmil as specified by the manufacturer.
How does the side-wired design of the QS2125H benefit installation?
The QS frame features an exclusive side-wired design that allows for a single right-hand bend. This saves wiring space inside the meter stack and eliminates the need to form difficult S bends with large conductors.
Is the Siemens QS2125H circuit breaker HACR rated?
Yes, this thermal-magnetic breaker is HACR type rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific protection standard.
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