Siemens Q21525CTNC 15/25A Triplex Miniature Circuit Breaker
- 15/25A
- 4 Pole
- Plug-On
Quantity
Siemens Q21525CTNC - 15/25A Triplex Miniature Circuit Breaker
New
Quantity
Description
Built to maximize circuit density, this 15/25A triplex breaker combines three independent circuits into a standard two-pole space. It is specifically designed for residential power distribution where adding a subpanel is not feasible. The Non-CTL plug-on design lacks a rejection clip, allowing it to fit into older Siemens, ITE, and Gould load centers. It acts as an exact substitute for the MP21525NH breaker.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 15/25A |
| Poles | 4 |
| 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), Older ITE/Gould Panels |
| 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 |
| Construction Features | HACR Rated, Common Trip, Insta-Wire |
Product FAQs
6 answersWhat load centers are compatible with the Q21525CTNC breaker?
This Non-CTL plug-on breaker is designed for older Siemens, ITE, and Gould panels that accept twin or quad breakers without requiring a rejection clip.
How much panel space does this quad breaker require?
The Q21525CTNC provides four circuits but only occupies two standard 1-inch pole spaces in your load center, making it ideal for maximizing circuit density.
Can the Q21525CTNC replace older Murray quad breakers?
Yes, this Siemens breaker serves as a direct replacement for the obsolete Murray MP21525NH circuit breaker.
How are the amperages configured on this triplex breaker?
The unit features two independent 1-pole 15-amp circuits on the outer poles and one 2-pole 25-amp common-trip circuit on the inner poles.
Does the Q21525CTNC include a rejection clip?
No, this is a Non-CTL (Circuit Total Limiting) breaker. It lacks a rejection clip, allowing it to fit into older panels designed before CTL requirements were implemented.
What do the CT and NC stand for in the Q21525CTNC part number?
The CT indicates a common-trip mechanism for the inner 2-pole 25-amp circuit, while NC stands for Non-CTL, meaning the breaker does not have a rejection feature.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 49 reviews.
- BBBrent b.Verified BuyerReviewingSiemens Q33000S01 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/14/26Fit and fine
These breakers are newly required here in Los Angeles County and they fit right in. Due to the forth space I had to be careful with phasing and moving singles but it all went great.
- 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.