Siemens Q21515CTNC 15/15A Triplex Miniature Circuit Breaker
- 15/15A
- 4 Pole
- Plug-On
Quantity
Siemens Q21515CTNC - 15/15A Triplex Miniature Circuit Breaker
New
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Description
Engineered for residential power management, the Siemens Q21515CTNC combines two 1-pole 15A circuits and one 2-pole 15A circuit into a compact 2-inch module. This allows installers to add branch circuits without upgrading the entire enclosure. Designed as a non-CTL breaker without rejection clips, it mounts into older Siemens EQ, EQL, SEQ, and EQG load centers. The plug-on design ensures a secure connection. The center poles share a common trip mechanism for reliable 240V protection.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 15/15A |
| Poles | 4 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Load Centers (Non-CTL) |
| 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 | Triplex |
|---|---|
| Available Options | Padlock Attachment |
| Standards | CSA C22.2 No. 5, HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat type of load centers accept the Q21515CTNC breaker?
This Non-CTL breaker is designed for older, pre-1968 Siemens, ITE, and Gould load centers that do not feature Circuit Total Limiting (CTL) rejection tabs. It is intended strictly for replacement use in these legacy panels.
Can I install this Non-CTL breaker in a modern Class CTL panelboard?
No. Installing a Non-CTL breaker in a modern Class CTL panelboard violates the UL listing of the assembly. This breaker lacks the rejection clip found on CTL breakers and is strictly for use in older, non-limiting panels.
How many panel spaces are required to install this breaker?
This quad-style breaker requires two standard 1-inch panel spaces. It consolidates two independent 1-pole 15A circuits and one shared 2-pole 15A circuit into a compact footprint.
How are the voltages distributed across the poles on this breaker?
The two outer poles operate as independent 120V single-pole circuits. The two inner poles are tied together with a common trip mechanism to provide a single 240V double-pole circuit.
Do the inner and outer circuits share a trip mechanism?
The inner 2-pole 15A circuit features a common trip mechanism, ensuring both legs disconnect simultaneously during an overcurrent event. The two outer 1-pole 15A circuits operate and trip independently of each other and the inner circuit.
Is this a direct replacement for legacy ITE or Gould breakers?
Yes. Siemens acquired the ITE and Gould electrical distribution product lines. This breaker is the direct, UL-listed replacement for older ITE and Gould quad breakers requiring a Non-CTL configuration.
Does the Q21515CTNC provide arc fault or ground fault protection?
No. This unit is a standard thermal-magnetic breaker that provides only overload and short-circuit protection. It does not include 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.