Siemens QF240A 40 Amp 2 Pole GFCI Circuit Breaker

40 A 2-Pole QF GFCI Circuit Breaker, 120/240 V

SKU: QF240  |  MPN: QF240A  |  Brand: Siemens

• Provides ground-fault protection (~5 mA sensitivity) for wet or outdoor circuits requiring safety compliance.
• Two-pole design protects both hot legs in 120/240 V applications.
• Rated for 10,000 A interrupt capacity to respond safely to short-circuit conditions.
• UL / cUL listed; Type QF GFCI breaker, part of the Q / QP series.
• Support for plug-in mounting in compatible Siemens load centers; wire size range #8-#6 AWG as typical for this rating.

Technical Specifications

Overview

The Siemens QF240A is a 40-amp, 2-pole GFCI circuit breaker designed for 120/240 V systems. It protects both legs with ground-fault detection and is suitable for outdoor, wet, or other code-sensitive areas. The 10 kAIC rating supports safe interruption of fault currents. Ideal for larger branch circuits like outdoor equipment, spa or pool power, and other high-amp applications requiring ground-fault safety.

What’s Included

• Siemens QF240A GFCI breaker unit
• Installation instructions / safety documentation

Compatibility & Replacements

Compatible with Siemens Q and QP-series load centers. Should replace older QF 40 A 2-pole GFCI breakers in this series. Panels must have slots matching plug-in GFCI breaker dimensions and supporting this rating.

Installation & Notes

• Ensure panel is rated for a 40 A two-pole breaker and supports the physical footprint of QF240A.
• Use appropriate conductor size (commonly #8-6 AWG) per code and manufacturer spec.
• Verify GFCI trip sensitivity (~5 mA) and test after installation; perform periodic test per safety guidance.
• Work must be done by a qualified electrician; comply with NEC or local codes for GFCI protection requirements in wet/outdoor locations.

Shipping & Returns

Ships from the USA. 30-day returns; customer pays return shipping. Please see our Shipping & Returns policy for full details.