PTF Relay Sockets Omron Industrial Automation PTF Relay Sockets offer up to a 10A current rating, 5% to 85% ambient operating humidity, and 1000MΩ insulation resistance. These sockets feature Push-In Plus technology and are used to save wiring work in comparison with traditional screw terminals. The PTF series has light insertion force and strong pull-out strength, achieving less wiring work and high reliability. OMRON Industrial Automation PTF Relay Sockets operate in a -40°C to +70°C temperature range.