The Siemens Q240 is a 40-amp double-pole Type QP breaker commonly selected for 240V circuits serving electric ranges, larger air-conditioning condensers, and some EV charging equipment. Its plug-in QP design lets it snap into compatible Siemens and Murray panels while bridging both hot legs for proper 240V service. Thermal-magnetic tripping gives the breaker dependable residential protection against both sustained overloads and sudden short-circuit conditions. With a 10 kAIC interrupt rating and Siemens Lifetime Limited warranty, the Q240 is a practical replacement for many heavier 240V household loads.
What appliances usually use a 40-amp double-pole breaker?
A 40-amp double-pole breaker is often used on 240V electric ranges, cooktops, larger condensers, and some EV chargers with a 40-amp branch requirement. The actual appliance nameplate and installation manual should always control the final breaker size. The branch conductors also need to match the 40-amp rating.
Is installation different from a regular single-pole breaker?
Yes, a double-pole breaker spans two adjacent spaces and must engage both phases of the panel bus. The Q240 still uses the same Siemens QP plug-in style, but it covers both hot legs and has a tied internal mechanism. That gives the circuit a proper 240V supply and common-trip operation.
Why is a common-trip double-pole breaker important for 240V circuits?
If one leg faults or trips, both hot legs need to disconnect together so the appliance is not left half energized. A listed double-pole breaker does that automatically. Two unrelated single-pole breakers cannot provide the same protection or meet the same use case.
Can the Q240 be used in older Siemens load centers?
It can be used in many older Siemens residential panels as long as the labeling lists Type QP breakers. It is also listed for Murray panels and the Siemens ES, EQ, PL, E, P, W, HW, HPW, G, HG, SGF, SN, XG, and OG families. Checking the panel label is still the right first step before ordering.
# Siemens 40 Amp Double Pole Type QP Circuit Breaker (Q240) **Model:** `Q240` **Brand:** Siemens **Category:** Circuit Breaker > The Siemens Q240 is a 40-amp double-pole Type QP breaker commonly selected for 240V circuits serving electric ranges, larger air-conditioning condensers, and some EV charging equipment. Its plug-in QP design lets it snap into compatible Siemens and Murray panels while bridging both hot legs for proper 240V service. Thermal-magnetic tripping gives the breaker dependable residential protection against both sustained overloads and sudden short-circuit conditions. With a 10 kAIC interrupt rating and Siemens Lifetime Limited warranty, the Q240 is a practical replacement for many heavier 240V household loads. ## Specifications | Attribute | Value | |---|---| | Product Type | Circuit Breaker | | Poles | 2 | | Amperage | 40 | | Voltage Vac | 240 | | Interrupt Rating Ka | 10 | | Trip Type | Thermal-Magnetic | | Afci Protection | No | | Gfci Protection | No | | Self Test | No | | Plug On Neutral | No | | Wire Gauge Awg | 8-6 | | Compatible Panels | Siemens ES, EQ, PL, E, P, W, HW, HPW, G, HG, SGF, SN, XG, OG series; Murray panels | | Certifications | UL 489 | | Warranty | Lifetime Limited | ## What's Included - (1) Siemens Q240 Circuit Breaker Source: https://www.jaspecs.com/siemens/circuit-breaker/q240-siemens-40a-double-pole-circuit-breaker/