Siemens Q2020NC 20/20A Tandem Miniature Circuit Breaker
- 20/20A
- 2 Pole
- Plug-On
Quantity
Siemens Q2020NC - 20/20A Tandem Miniature Circuit Breaker
New
Quantity
Quantity
Siemens Q2020NC - 20/20A Tandem Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q2020NC |
| Series | Q |
| Amperage | 20/20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (Non-CTL / Pre-1968) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (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 |
| Special Classification | Tandem |
|---|---|
| Available Options | Padlock Attachment |
| Standards | CSA C22.2 No. 5, HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Quantity
Siemens Q2020NC - 20/20A Tandem Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q2020NC-R |
| Series | Q |
| Amperage | 20/20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (Non-CTL / Pre-1968) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (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 |
| Special Classification | Tandem |
|---|---|
| Available Options | Padlock Attachment |
| Standards | CSA C22.2 No. 5, HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Description
Delivering two independent 20-amp circuits in a single one-inch footprint, the Q2020NC tandem breaker saves valuable panel space. Built for residential applications, it expands capacity in older, fully populated electrical panels. Featuring a non-CTL design without a rejection clip, it installs into pre-1968 Siemens and Murray load centers. It also serves as a drop-in substitute for the MP2020NC. Rated for 10 kAIC, this thermal-magnetic breaker includes SWD and HACR ratings.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q2020NC |
| Series | Q |
| Amperage | 20/20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (Non-CTL / Pre-1968) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (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 |
| Special Classification | Tandem |
|---|---|
| Available Options | Padlock Attachment |
| Standards | CSA C22.2 No. 5, HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat does the "NC" designate in the Siemens Q2020NC catalog number?
The "NC" stands for Non-CTL (Non-Circuit Total Limiting). This breaker lacks the rejection clip found on standard CTL tandem breakers, allowing it to be installed in older, pre-1968 load centers that do not have notched busbars for CTL rejection.
Can the Q2020NC be used in modern Siemens load centers?
No. Modern Siemens panels manufactured after 1968 require CTL-compliant breakers to prevent exceeding the panel's designed circuit capacity. For newer panels, use the standard Q2020 tandem breaker which includes the required rejection clip.
Is this breaker a suitable replacement for older Murray tandem breakers?
Yes. Siemens manufactures the Q2020NC as a direct, UL-listed replacement for the obsolete Murray MP2020NC non-CTL tandem breaker.
How much panel space does the Q2020NC require?
This tandem breaker provides two independent 20-amp, 1-pole circuits while occupying only a single 1-inch space on the panel busbar.
Is the Q2020NC rated for use with HVAC equipment?
Yes, this breaker is HACR rated, making it approved for protecting heating, air conditioning, and refrigeration equipment circuits.
Can this breaker be used to switch lighting circuits?
Yes, the Q2020NC carries an SWD (Switching Duty) rating, meaning it is approved to be used as a switch for 120V fluorescent lighting loads on a regular basis.
Does the Q2020NC provide arc fault or ground fault protection?
No. This is a standard thermal-magnetic breaker that provides only overload and short-circuit protection. It does not contain AFCI or GFCI circuitry.
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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.