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Three transparent thermal overload units in a pack

Eaton

Eaton H2016B-3 Cutler-Hammer Thermal Unit 39.6-57.4A Trip Class 20 Pack of 3

SKU CH-CPH3-S2ZKD

Thermal overload unit rated 39.6 to 57.4 A with Trip Class 20 protection, supplied in a pack of three

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Trip Class 20 ensures reliable overload response
  • Thermal protection covers 39.6 to 57.4 A full-load range
  • Designed for NEMA Size 2 motor starters
  • Compatible with Series Freedom frame sizes G through K
  • Pack of three units simplifies multi-starter maintenance

Thermal unit for NEMA Size 2

The Eaton H2016B-3 Cutler-Hammer thermal unit provides overload protection for motor starters rated NEMA Size 2. It suits industrial maintenance teams and panel builders who need to match the heater element to a specific full-load current range. The pack of three supports spares stock or multi-starter installations.

Trip Class 20 thermal response

Trip Class 20 defines the thermal trip curve so the unit allows typical motor starting currents before operating on sustained overload. The bi-metallic mechanism reacts to heat generated by 39.6 to 57.4 A full-load current without external power or control wiring. Transparent housing lets technicians verify element condition during routine inspections.

Series Freedom frame compatibility

Each unit fits Series Freedom starters using Frame Size G, H, J or K, so the same heater works across several starter frames. The three-pack reduces re-order frequency for plants that standardise on this NEMA size. No software or configuration is required; selection is purely by the motor nameplate current.

Highlights

  • Trip Class 20 ensures reliable overload response
  • Thermal protection covers 39.6 to 57.4 A full-load range
  • Designed for NEMA Size 2 motor starters
  • Compatible with Series Freedom frame sizes G through K
  • Pack of three units simplifies multi-starter maintenance

Specifications

BrandEaton
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

How is the Eaton H2016B-3 thermal unit installed, and what step is commonly missed?

Install the unit into a compatible Series Freedom starter with Frame Size G, H, J or K by aligning the terminals and securing the mounting hardware. The step often missed is verifying the starter’s NEMA Size 2 rating matches the unit before wiring.

What maintenance or replacement will the Eaton H2016B-3 thermal unit need later?

The thermal unit is a single-use protective device; after it trips on sustained overload between 39.6 and 57.4 A, the entire unit must be replaced. No internal parts are serviceable or resettable.

What limit appears first on the Eaton H2016B-3 thermal unit under sustained use?

Trip Class 20 defines the thermal time-current curve; sustained current above 57.4 A will cause the unit to trip within the Class 20 time limit, removing power to protect the motor circuit.

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