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Siemens Q21515CT Triplex Miniature Circuit Breaker
- 15A
- 4 Pole
- Plug-On
Siemens
Q21515CT
Triplex Miniature Circuit Breaker
Brand
Siemens
SKU
Q21515CT
Quantity
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Siemens Q21515CT - 15A Triplex Miniature Circuit Breaker
New
Quantity
Quantity
Siemens Q21515CT - 15A Triplex Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q21515CT |
| Series | QT |
| Amperage | 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 Load Centers (Type EQ, PL, ES, Ultimate) |
| 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, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Sold out
Quantity
Siemens Q21515CT - 15A Triplex Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q21515CT-R |
| Series | QT |
| Amperage | 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 Load Centers (Type EQ, PL, ES, Ultimate) |
| 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, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
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Description
Engineered for residential distribution, this 15A Siemens triplex breaker delivers two outer 1-pole circuits and one inner 2-pole circuit in a two-space design. The QT series plug-on unit installs into Siemens EQ, PL, ES, and Ultimate load centers. It replaces the discontinued MP21515CT, offering an easy way to add circuits to full panels. Rated at 10kAIC, it utilizes thermal-magnetic trip technology with a common trip for the center poles. HACR and SWD rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q21515CT |
| Series | QT |
| Amperage | 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 Load Centers (Type EQ, PL, ES, Ultimate) |
| 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, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich load centers are compatible with the Q21515CT triplex breaker?
This QT series plug-on breaker is designed for use in Siemens EQ, PL, ES, and Ultimate load centers that accept CTL-type QT breakers. It is also compatible with older ITE and Gould panels rated for QT breakers.
Can the Q21515CT replace Murray circuit breakers?
Yes, the Siemens Q21515CT is the direct replacement for the discontinued Murray MP21515CT triplex breaker.
How many panel spaces does this triplex breaker require?
The Q21515CT requires two standard 1-inch panel spaces to provide two independent 1-pole 15A circuits and one common-trip 2-pole 15A circuit. This space-saving design is ideal for adding circuits to full panels.
Is the Q21515CT suitable for HVAC and lighting applications?
Yes, this breaker is both HACR (Heating, Air Conditioning, and Refrigeration) and SWD (Switching Duty) rated, making it suitable for HVAC equipment and standard 120V fluorescent lighting circuits.
Does the 2-pole circuit feature a common trip?
Yes, the inner 2-pole 15A circuit features an internal common trip mechanism. This ensures both legs disconnect simultaneously during an overload or short circuit, providing safe operation for 240V loads.
Is this a CTL or non-CTL circuit breaker?
The Q21515CT is a CTL (Circuit Total Limiting) breaker. It features a rejection clip and can only be installed in load centers specifically designed to accept CTL tandem or triplex breakers.
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