SIEMENS QF240A GFCI Breaker – 40A, 2-Pole, 120/240V, UL 943 Self-Test

Overview

The SIEMENS QF240A is a double‑pole, 40 Amp GFCI circuit breaker designed to safeguard circuits against ground faults while delivering dependable protection through a built‑in self‑test and lockout feature. This model emphasizes continuous monitoring, helping to maintain protective performance between inspections.

Key Benefits

• 10,000 AIC interrupting rating for strong fault response.
• Self-test capability as required by UL 943, adding an extra layer of safety validation.
• Class A GFCI protection to help detect unwanted ground faults and reduce risk to people and connected equipment.
• Double pole, 40 Amp, type QPF2 GFCI circuit breaker for broader circuit protection.
• Versatile for a range of spaces, including spas, hot tubs, kitchens, and bathrooms.

Self-Test and Lockout for Ongoing Safety

The device automatically runs a self-check to verify its protective function, and if an impairment is detected, it trips and locks out. This design helps prevent users from assuming the breaker was tripped for a legitimate fault, and instead ensures the unit remains in a safe, non-resettable state until proper servicing is performed.

Real-Life Scenarios

Imagine a kitchen remodel where a dedicated circuit powers a dishwasher and small appliance outlets, or a bathroom renovation with new lighting and outlets near a vanity. In spas or hot tubs, reliable protection is important for both comfort and safety. The QF240A is built to withstand daily cycling and 120/240V configurations while maintaining protective integrity across these environments.

Specifications at a Glance

• Voltage: 120/240 V
• Poles: 2
• Amp rating: 40 A
• Interrupting rating: 10,000 AIC
• Protection: Class A GFCI
• UL 943 self-test compliance
• Application: Spas, kitchens, bathrooms, and similar spaces

When selecting a breaker for a protection plan, consider the type of loads, the circuit layout, and the need for ongoing self‑verification. The SIEMENS QF240A is designed to provide reliable ground fault protection with a built‑in self‑test and a protective lockout, inviting confidence without overpromising results.