Siemens type QAF2, model QA120AFCCSA arc fault circuit interupter/breaker. 20 amp single pole for 120 volt AC
Able to sense and switch off the circuit if an electrical arc occurs which will help to prevent a fire developing, commonly used on circuits for bedrooms.
Priced at $50 for used and $90 for new in box.
Siemens Arc Fault Circuit Breaker
C$50.00Price
905 981 7393