ASCO QB11A4 Temperature Switch

ASCO QB11A4 Temperature Switch is part of ASCO’s S-Series temperature switches, a two-component package pairing a switch unit with a transducer unit for temperature sensing and control. The switch unit and transducer unit work together to translate ambient temperature into a defined electrical switching action, with a non‑adjustable automatic reset point that restores the circuit when the temperature falls below the reset threshold. The QB11A4 designation places this model in the QB family within ASCO’s S-Series lineup, as documented in official ASCO catalogs and product references that list QB11A4 among QB-series temperature switches. This centralized, two-component configuration provides a compact, self-contained temperature-switch solution suitable for monitoring and triggering outputs in equipment protection schemes.