Siemens QF240 GFCI Miniature Circuit Breaker

This breaker is designed for use in Siemens PL, ES, EQ, and Ultimate load centers. It requires two standard 1-inch spaces for installation.

The QF240 features a pigtail neutral. The coiled white wire must be connected directly to the panel neutral bus bar for the ground fault protection to function properly.

Yes. For straight 240V loads without a load neutral, you can leave the load neutral lug on the breaker empty. However, the breaker's white pigtail must still be connected to the panel neutral bus bar.

It provides Class A ground fault protection, which trips when a ground fault of 5mA is detected. This ensures personnel safety in wet locations like spas, pools, and kitchens.

Yes, Siemens QF series breakers are HACR rated, making them suitable for use with heating, air conditioning, and refrigeration equipment.

The QF240A is the newer version that includes an automatic self-testing feature to meet updated UL 943 requirements. The QF240 is the standard version without the self-test function, though both provide 40A Class A ground fault protection.

The breaker lugs accept 8 to 6 AWG copper wire or 8 to 4 AWG aluminum wire. Always ensure connections are torqued to the manufacturer specifications printed on the breaker.

Siemens acquired Murray and has issued substitution letters stating that Siemens QP and QF breakers are UL listed for use in Murray Rock Solid load centers. Always verify acceptance with your local inspector before substituting.