A17.9 - Square D - Overload Relay Thermal Unit Category_ Surge Protection The QO 20 / 30

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A17.9 - Square D - Overload Relay Thermal Unit Category_ Surge Protection The QO 20 / 30A17. 9 Square D Overload Relay Thermal Unit Square D, A Series, thermal overload heater element, type A, rated for 10. 7 12. 2 amps, Use with thermal overload relays, magnetic motor starters & motor controls Manufacturer: Schneider Electric Family: A Series Type: A Overload Heater Specifications Thermal Unit Motor Tripping Class: 20 Sensing Method : Melting Alloy Plug In Mounting Full Load Amps Min: 10. 7 Full Load Amps Max: 12. 2 Trip Type: Standard