Honeywell T4054A B; T6054A INDUSTRIAL LINE VOLTAGE THERMOSTATS T4054 AND T6054 INDUSTRIAL LINE VOLTAGE THERMOSTATS PROVIDE EITHER PSST OR SPOT LINE VOLTAGE CONTROL iN VENTILATION, HEATING OR COOLING APPLICATIONS. () ¥a034A 0 740548 a T6054A « Suitable for mounting in any position. + Sp st or spit snap-action switch. » Fast response, hydraulic temperature sensitive clement. + Compact size. + Wide temperature range.