Siemens Q120H Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
Q120H
Miniature Circuit Breaker
Brand
Siemens
SKU
Q120H
Quantity
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Siemens Q120H - 20A 1 Pole Miniature Circuit Breaker
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Description
Rated at 22kAIC for enhanced short-circuit defense, the Siemens Q120H provides robust thermal-magnetic protection for standard 120V branch circuits. This QPH series device features a convenient plug-on mounting style for quick installation. It is fully compatible with Siemens PL, ES, and Ultimate load centers, and serves as a direct, UL-listed replacement for the legacy Murray MP120H. The breaker includes Siemens' Insta-Wire feature for faster wiring and is HACR and SWD rated.Specifications
| Brand | Siemens |
|---|---|
| Series | QPH |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC |
| 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 | 14-6 AWG (Cu/Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Handle Tie |
|---|---|
| Accessories | Insta-Wire |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Switching Duty (SWD), Insta-Wire |
Product FAQs
6 answersCan I use the Siemens Q120H in a Murray load center?
Yes. Siemens QP and QPH series breakers are UL listed for use in Murray load centers, as well as Siemens EQ, PL, ES, and Ultimate series panels.
What is the difference between the Siemens Q120 and Q120H?
The primary difference is the interrupting rating. The standard Q120 is rated for 10kAIC, while the Q120H is rated for 22kAIC. Both share the same physical dimensions and thermal magnetic trip functions.
Can I replace a standard 10kAIC breaker with the 22kAIC Q120H?
Yes. It is safe and code-compliant to install a breaker with a higher interrupting rating in place of a lower-rated breaker, provided the amperage and frame type match the panel requirements.
Does the Q120H provide ground-fault or arc-fault protection?
No. The Q120H is a standard thermal magnetic circuit breaker designed for overload and short-circuit protection. It does not include integrated GFCI or AFCI circuitry.
Will the Q120H fit in a tandem breaker slot?
The Q120H is a full-size 1-inch breaker. It requires a standard 1-inch space on the busbar and cannot be used to condense circuits like a half-inch tandem (Type QT) breaker.
Does the Q120H require a neutral connection?
No. As a standard thermal magnetic breaker, the Q120H does not require a neutral pigtail or plug-on neutral connection. It only requires the load wire to be landed on the breaker lug.
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