Siemens Q22050CT 20/50/20A Triplex Miniature Circuit Breaker

This Type QT breaker is compatible with Siemens EQ, PL, ES, and Ultimate load centers that are designed to accept CTL (Circuit Total Limiting) breakers.

This quad circuit breaker requires two standard 1-inch panel spaces. It provides two independent 20A single-pole circuits on the outside and one 50A double-pole common-trip circuit on the inside.

The 20A outer poles accept 14-6 AWG copper or 12-6 AWG aluminum wire. The 50A inner poles accept 8-6 AWG copper or 8-4 AWG aluminum wire.

The CT suffix indicates that the breaker features a CTL (Circuit Total Limiting) rejection clip to prevent installation in non-CTL panel slots. It also denotes a common-trip mechanism for the inner 50A double-pole circuit.

No. Type QT breakers feature a rejection clip and will only seat properly in panel slots specifically notched for CTL tandem or quad breakers. Forcing a QT breaker into a standard QP-only slot violates code and can damage the bussing.

Yes, Siemens manufactures this breaker as the direct, UL-listed replacement for the legacy Murray MP22050 and MP22050CT quad breakers.

No, the two 20A outer poles operate as independent 120V single-pole circuits. Only the inner 50A poles are tied together with a common trip for 240V applications.

No, the Q22050CT is a standard thermal-magnetic breaker. It provides standard overload and short-circuit protection but does not offer Arc Fault (AFCI) or Ground Fault (GFCI) capabilities.

It utilizes a fixed thermal-magnetic trip mechanism, providing a long-time response for standard overloads and an instantaneous response for short circuits.