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Siemens Q21525CT 15/25/15A Triplex Miniature Circuit Breaker
- 15/25/15A
- 4 Pole
- Plug-On
Siemens
Q21525CT
15/25/15A Triplex Miniature Circuit Breaker
Brand
Siemens
SKU
Q21525CT
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Siemens Q21525CT - 15/25/15A Triplex Miniature Circuit Breaker
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Description
Part of the QT series, this 4-pole triplex breaker delivers two 15A single-pole circuits alongside a 25A double-pole circuit. The compact footprint requires only two standard panel spaces, making it an excellent solution for residential upgrades where enclosure room is limited. This plug-on breaker installs into modern Siemens EQ, PL, ES, and Ultimate load centers. It effectively replaces the legacy MP21525 part number.Specifications
| Brand | Siemens |
|---|---|
| Series | QT |
| Amperage | 15/25/15A |
| 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 EQ, PL, ES, Ultimate Load Centers |
| 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 | HACR Rated, SWD Rated (15A Poles), UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
6 answersHow many panel spaces does the Q21525CT require?
This triplex breaker requires two standard 1-inch panel spaces to provide two 15A single-pole circuits and one 25A double-pole circuit.
What does the CT suffix indicate on this Siemens breaker?
The CT suffix designates this as a Class CTL (Circuit Total Limiting) breaker. It includes a rejection clip on the base, restricting installation to panel slots specifically notched to accept tandem or quad breakers.
What load centers accept the Q21525CT breaker?
This breaker installs into Siemens EQ, PL, ES, and Ultimate load centers. Because it is a Class CTL breaker, the panel must have notched bus stabs to accommodate the rejection clip.
Can this breaker replace legacy Murray components?
Yes, the Siemens Q21525CT serves as a direct replacement for the obsolete Murray MP21525 triplex circuit breaker.
How are the 15A and 25A circuits arranged on this triplex breaker?
The two outer poles operate as independent 15A single-pole circuits for 120V loads. The two inner poles are tied together to form a 25A double-pole circuit for 240V loads.
Does the Q21525CT provide arc fault or ground fault protection?
No, this is a standard thermal-magnetic breaker with long-time and instantaneous trip functions. It does not include AFCI or GFCI circuitry.
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