Siemens Q250 50-Amp 2-Pole Circuit Breaker — Type QP, 240V

The Siemens Q250 50-amp 2-pole circuit breaker carries the largest common 240V loads in a residential load centre — electric ranges, hot tubs, welders, and Level 2 EV chargers that draw up to 50 amps across both hot legs. Type QP plug-in construction snaps into Siemens EQ, PL, and ES series panels without bolts, and the common-trip tie bar guarantees both poles open together on a fault, as the Canadian Electrical Code requires for a 240V circuit. Inside, a calibrated thermal-magnetic mechanism handles the two failure modes that matter: it rides out the slow heat of a sustained overload without nuisance tripping, then opens hard and fast on a dead short, with a 10 kAIC interrupting rating that holds its ground on a 120/240V service. At 50 amps the breaker is UL-listed for 75°C-rated conductors, landing a #8–#4 wire cleanly so panel upgrades and hot-tub or EV installs move without a fight. CSA-certified and UL-listed, sourced through verified Siemens supply — not the refurbished or counterfeit stock that circulates on open marketplaces — it takes two slots in the panel and asks nothing further of them.