QE QUALITY heavy duty fan relays are equipped with a multi-positional mounting bracket and are capable of handling more intense loads than traditional fan relays. QE QUALITY heavy duty fan relays specifications include: totally enclosed compact body for dust proof operation, terminals: .250” male quick connectors, frequency: 50/60 Hz, mechanical life: 1,000,000 operations, and electrical life: 250,000 operations – resistive loads / 100,000 operations – inductive loads.