Siemens Q120HH00S01 Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Siemens Q120HH00S01 - 20A 1 Pole Miniature Circuit Breaker
New
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Description
Part of the Siemens QP family, the Q120HH00S01 miniature circuit breaker delivers reliable thermal-magnetic protection for commercial and industrial systems. It includes a factory-installed 120VAC shunt trip for remote operation. This plug-on unit installs into Siemens P1 panelboards and load centers. Featuring a high 65 kAIC interrupting capacity at 120VAC, it safely clears severe faults. It is HACR and SWD rated, utilizing Insta-Wire connectors for fast setup.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1 Panelboards, Siemens Load Centers |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120VAC (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR Rated, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Insta-Wire, HACR Rated, SWD Rated, HID Rated, High Interrupting Capacity |
Product FAQs
10 answersWhich Siemens panelboards are compatible with the Q120HH00S01 circuit breaker?
This plug-on breaker is designed for use in Siemens P1 panelboards and standard Siemens load centers that accept QP-frame breakers.
What does the 00S01 suffix indicate on the Siemens Q120HH00S01?
The 00S01 suffix designates that this circuit breaker includes a factory-installed 120VAC shunt trip, allowing the breaker to be tripped remotely via an external control signal.
Is the Q120HH00S01 considered a standard QP or an HQP breaker?
Because it features a high interrupting rating of 65kAIC at 120VAC, this breaker is classified as a Type HQP (High-Interrupting QP) circuit breaker, though it fits the same physical footprint as standard QP models.
What are the wiring requirements for the Q120HH00S01 terminal lugs?
The lugs accept 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire. When installing aluminum conductors, an oxide-inhibiting joint compound is highly recommended, and all connections must be torqued to the manufacturer specifications printed on the breaker.
What type of trip mechanism does the Q120HH00S01 utilize?
It uses a fixed thermal-magnetic trip mechanism. This provides long-time thermal protection against sustained overloads and instantaneous magnetic protection against severe short circuits.
Is the Siemens Q120HH00S01 rated for HVAC and lighting applications?
Yes, the base Q120HH breaker carries HACR (Heating, Air Conditioning, and Refrigeration) and SWD (Switching Duty) ratings, making it suitable for protecting HVAC equipment and switching 120V fluorescent lighting circuits.
How does the Q120HH00S01 mount into a panelboard?
It features a plug-in connection type, allowing it to snap directly onto the busbar of compatible Siemens load centers and P1 panelboards without the need for bolt-on hardware.
Can I use the Q120HH00S01 to replace a standard Q120HH?
While both are 20A, 1-pole, 65kAIC breakers, the Q120HH00S01 includes a 120V shunt trip. If your application does not require remote tripping, a standard Q120HH will provide the same overcurrent protection, but the shunt trip feature on the Q120HH00S01 would simply remain unused.
Does the Q120HH00S01 require a dedicated control circuit for the shunt trip?
Yes, the factory-installed 120VAC shunt trip requires a separate control signal to activate the remote tripping function. This is typically wired to an emergency stop button, fire alarm relay, or other external control device.
Does the Q120HH00S01 feature Insta-Wire connectors?
Yes, this breaker includes Siemens Insta-Wire connectors, which means the terminal screws are backed out and ready for wire insertion straight from the factory, speeding up the installation process.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 reviews.
- CGCrocefissa G.Verified BuyerReviewingSiemens Q115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Quick delivery and great price.
The circuit breakers are at a great cost.
- JBJason B.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Great experience
The product was exactly what I needed and it arrived on time.
- DQDon Q.Verified BuyerReviewingSiemens Q3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Siemens breaker
Great customer experience, great prices and fast shipping... Definitely will be buying her again.
- CSChristopher S.Verified BuyerRated 5 out of 5 stars8/12/26Siemens 60
Perfect new condition
- GSGeorge S.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/4/26Great service
Every time I call or go online you have the parts I'm looking for.