Siemens Q330 – 30A 3 Pole Miniature Circuit Breaker Best Seller

Designed for everyday commercial and industrial branch circuit protection, this 30-amp QP series device offers reliable thermal-magnetic tripping. The three-pole configuration ensures all phases disconnect simultaneously during an overload or short circuit event. It easily installs into standard Siemens panelboards and load centers, while also acting as an exact replacement for legacy Murray MP330 units.