Eaton H2015B-3 Thermal Unit 29-44.1A Trip Class 20 1.900 Freedom Series PK3

Eaton Freedom Series Thermal Unit

This Eaton thermal unit provides overload protection for motor starters in the Freedom Series. It is rated for a full-load current range of 29 to 44.1 amperes and matches NEMA Size 2 equipment. The unit carries Trip Class 20 timing and fits Frame Sizes G through K. It ships as a package of three identical units.

Trip Class 20 Current Range

The device covers a continuous current window of 29 to 44.1 amperes, suitable for motors operating within that band. Trip Class 20 defines the maximum tripping time under locked-rotor conditions, giving a balance between nuisance-tripping avoidance and winding protection. Applications drawing sustained current above 44.1 amperes fall outside the calibrated range and require a larger unit. The fixed calibration means the unit cannot be adjusted for lower or higher settings.

Thermal Operation Characteristics

Thermal operation relies on a bimetallic element that responds to heating from motor current, so no external control power is needed. Ambient temperature influences trip time; higher surroundings accelerate tripping while cooler surroundings delay it. The unit adds negligible voltage drop and draws no measurable control-circuit current. Mounting orientation follows the starter manufacturer's guidelines to ensure accurate thermal response.