Siemens Q21530CT2 15/30A Quadplex Miniature Circuit Breaker
- 15/30A
- 2 Pole
- Plug-On
Quantity
Siemens Q21530CT2 - 15/30A Quadplex Miniature Circuit Breaker
New
Quantity
Description
Part of the QT series, this 15/30A quadplex breaker provides residential overload and short-circuit protection. It features inner 30A and outer 15A double-pole configurations, doubling circuit density. Designed for plug-on installation, it mounts into Siemens CTL and Murray load centers, serving as a drop-in replacement for the MP21530CT2. Both circuit pairs utilize common trip mechanisms, and the 15A poles carry an SWD rating for switching fluorescent lighting loads.Specifications
| Brand | Siemens |
|---|---|
| Series | QT |
| Amperage | 15/30A |
| 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 (CTL), Murray 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 | Quadplex |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Rejection Clip (Factory Installed) |
| Standards | HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, CTL Rejection, Insta-Wire |
Product FAQs
6 answersIs the Siemens Q21530CT2 a CTL or non-CTL breaker?
The Q21530CT2 is a CTL (Circuit Total Limiting) breaker. It features a rejection clip and is designed exclusively for Siemens and Murray load centers that accept CTL-type QT breakers.
How many panel spaces does the Q21530CT2 quadplex breaker require?
This quadplex breaker requires two full one-inch panel spaces to provide two independent double-pole circuits.
What is the amperage configuration for the inner and outer poles on the Q21530CT2?
The Q21530CT2 features a 30A double-pole circuit on the inner poles and a 15A double-pole circuit on the outer poles.
Are the circuits on this quad breaker independent or common trip?
Both the 15A outer circuit and the 30A inner circuit feature common trip mechanisms, which is indicated by the CT2 suffix in the part number. If a fault occurs on one leg of either circuit, both legs of that specific circuit will trip simultaneously.
Can I use the Siemens Q21530CT2 to replace a Murray quad breaker?
Yes, Siemens QT breakers are UL listed for use in Murray load centers and serve as a direct drop-in replacement for the legacy Murray MP21530CT2 quadplex breaker.
Is the Q21530CT2 rated for switching fluorescent lighting loads?
Yes, the 15A outer poles on this breaker carry an SWD (Switching Duty) rating, making them suitable for switching fluorescent lighting circuits.
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