Siemens Q2020 Twin 20-Amp Circuit Breaker — Type QT Tandem, 10 kAIC

The Siemens Q2020 twin circuit breaker fits two independent 20-amp circuits into a single panel slot, buying back room in a load centre that's out of open positions before it's out of circuits to add. Type QT tandem construction stacks two single-pole 20-amp breakers in one 1-inch footprint, so a kitchen, garage, or shop circuit lands without forcing a subpanel just to make space. A calibrated thermal-magnetic mechanism handles both failure modes on each circuit: 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 on a 120/240V service. The rejection feature seats it only in panel positions rated for tandem breakers — the physical guard that keeps a load centre inside its listed circuit count, rather than overfilled past what the panel label allows. CSA-certified and UL-listed, sourced through verified Siemens supply — not the refurbished or counterfeit stock that circulates on open marketplaces — it earns two 20-amp circuits from a single slot and asks nothing further of it.