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Siemens P120 Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Siemens
P120
Molded Case Circuit Breaker
Brand
Siemens
SKU
P120
Quantity
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Siemens P120 - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens P120 - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | P120 |
| Series | P |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Screw/Clamp Terminal |
|---|---|
| For Use With | Pushmatic Load Centers |
| Wire Gauge | 14-10 AWG (Cu/Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Push-Button Actuation, HACR Rated |
Sold out
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Siemens P120 - 20A 1 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | P120-R |
| Series | P |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Screw/Clamp Terminal |
|---|---|
| For Use With | Pushmatic Load Centers |
| Wire Gauge | 14-10 AWG (Cu/Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Push-Button Actuation, HACR Rated |
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Description
Built for older electrical systems, the Siemens P120 delivers 20 amps of thermal-magnetic protection. This single-pole breaker features the unique push-button actuation that defines the classic Pushmatic design. Installs into legacy Bulldog, ITE, Gould, and Siemens Pushmatic load centers using a secure bolt-on connection. It serves as an exact replacement for aging components. Rated for 10 kAIC at 120VAC, this HACR-rated unit ensures reliable overcurrent defense and meets UL 489 standards.Specifications
| Brand | Siemens |
|---|---|
| Part Number | P120 |
| Series | P |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Screw/Clamp Terminal |
|---|---|
| For Use With | Pushmatic Load Centers |
| Wire Gauge | 14-10 AWG (Cu/Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Push-Button Actuation, HACR Rated |
Product FAQs
6 answersWhich legacy panels are compatible with the Siemens P120?
This breaker is designed exclusively for Pushmatic load centers. It is fully compatible with older Pushmatic panels originally manufactured by Bulldog, ITE, Gould, and Siemens.
What are the alternate catalog numbers for this 20A Pushmatic breaker?
Depending on the era of your electrical system, this exact 20-amp breaker may be labeled as Bulldog P120, ITE P120, or Gould P120. The Siemens P120 serves as the direct replacement for all of these legacy part numbers.
How does the P120 connect to the panel busbar?
This breaker uses a bolt-on connection specific to Pushmatic panels. It secures directly to the busbar using a screw, which provides a reliable mechanical and electrical connection for older legacy systems.
Does this breaker use a standard toggle switch to reset?
No, Pushmatic breakers like the P120 feature a unique push-button actuation mechanism instead of a traditional toggle switch. The button is pressed to manually open or close the circuit and pops out when a trip occurs.
Can I use aluminum wiring with the Siemens P120?
Yes, the screw and clamp terminals are rated for both copper and aluminum conductors. When terminating aluminum wire, ensure you use the supported 14 to 10 AWG wire sizes and apply an appropriate joint compound.
Will this breaker fit in a standard Siemens load center?
No, the P120 is exclusively designed for legacy Pushmatic load centers. It will not fit in standard Siemens EQ, Ultimate, or PL series panels that require plug-on or standard bolt-on breakers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 18 reviews.
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Rating
18 reviews
- GJGregg J.Verified BuyerReviewingSiemens PFP3 Filler PlateI recommend this productRated 5 out of 5 stars8/8/25Easy to order and Quick Shipping
I needed some filler plates for an older breaker panel. Not available at any retail places I could find, thankfully Superbreakers had them. A couple minor issues: they didn't include the size specifications (L x W x D) online, which would have helped confirm they were the right fit; and they included an unrelated picture (along with the right one).
But the online order processing was easy-to-use and had all the info needed (especially the shipping options/costs, and the return policy). They also stuck to their word about getting it out in 24 hours. It arrived via UPS Ground in a respectful 5 days. They of course fit the panel and all is well.
Overall, very pleased with the company.
- MPMike P.ReviewingSiemens P120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/3/23Owner
Thank you, my breaker came sooner than I thought and it was the correct item
- DLDiana L.ReviewingSiemens P130 - 30A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/22/21The part was correct,, but
The part was correct,, but I was shocked when the cheapest (ground) shipping was almost as much as the part that only weighed 8 ounces. The part was $14.03 and the shipping was almost $13.00.
- CGCarlyle G.ReviewingSiemens P1520 - 15/20A Tandem Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/8/20I am happy with my
I am happy with my purchase of a new replacement breaker. Will save a lot of work.
- KDKurt D.ReviewingSiemens P120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/28/20Happy with my Purchase
This is the 4th time I have used SuperBreakers and have been happy with my purchase every time. I have an old style style system in my house and the company I was using told me the old style breakers were impossible to find and charged me $80 each. Next time I needed one I found SuperBreakers had them for $15 each. I am no longer using that electrical company.