Siemens Q120HH Molded Case Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Siemens Q120HH - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the QP family, the Siemens Q120HH is a single-pole molded case circuit breaker engineered for commercial and industrial electrical distribution. It provides reliable thermal-magnetic protection for 20A circuits, utilizing long-time and instantaneous trip functions to prevent overloads and short circuits. This plug-on breaker mounts into Siemens P1 panelboards and standard load centers. It features a robust 65kAIC rating at 120VAC, Insta-Wire connectors, and HACR and SWD certifications.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/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 |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Insta-Wire, HACR Rated, SWD Rated, HID Rated, High Interrupting Capacity |
Product FAQs
7 answersWhich load centers and panelboards are compatible with the Siemens Q120HH?
This plug-on breaker is designed for use in Siemens P1 panelboards as well as Siemens PL and ES series load centers.
What does the HH in the Q120HH catalog number indicate?
The HH designates a high interrupting rating of 65kAIC at 120V. This provides a higher fault current rating compared to standard 10kAIC or 22kAIC breakers in the Siemens QP family.
Is the Siemens Q120HH rated for switching duty and HVAC equipment?
Yes, this 20A breaker is both SWD (Switching Duty) and HACR (Heating, Air Conditioning, and Refrigeration) rated. It is suitable for switching 120V fluorescent lighting loads and protecting HVAC motor circuits.
What wire sizes are accepted by the lugs on the Q120HH?
The terminals accept 14 AWG to 6 AWG copper or aluminum wiring. The breaker also features Insta-Wire connectors to help speed up the installation process.
Can the Q120HH be used to replace a standard Q120 breaker?
Yes, the Q120HH shares the same physical dimensions and plug-on mounting as the standard Q120. It can be used as a direct replacement when a higher 65kAIC interrupting capacity is required by the electrical system.
Does the Q120HH require a bolted connection to the busbar?
No, it features a plug-on mounting style. It snaps directly onto the busbar of compatible Siemens load centers and panelboards without the need for bolted connections.
What type of trip mechanism does the Q120HH utilize?
It uses a fixed thermal magnetic trip mechanism. This provides a long-time response for thermal overloads and an instantaneous response for short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 48 reviews.
- DTDawn T.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/8/26Timely
This is exactly what I was looking for! Worked perfectly, arrived promptly, no hassles.
- 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