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Eaton FH27 thermal unit transparent rectangular block

Eaton

Eaton FH27 Cutler-Hammer Thermal Unit 3.08–3.36 A

SKU CH-22P0-6SPAC

Thermal overload unit rated 3.08 to 3.36 A with trip class 20 for NEMA sizes 0, 1, 2 starters

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Thermal overload protection for motor circuits
  • Trip Class 20 ensures reliable overload response
  • Compatible with Series A200 and B100 starters
  • Full-load current range 2.59 to 2.83 A
  • Fits NEMA Size 0, 1, 2 controllers

Eaton FH27 Thermal Unit Overview

The Eaton FH27 Cutler-Hammer thermal unit provides overload protection for motor starters in industrial control panels. It is designed for NEMA Size 0, 1 and 2 starters and suits maintenance engineers replacing worn elements in Series A200 or B100 equipment.

Trip Class 20 Protection Limits

This unit operates on Trip Class 20 thermal characteristics, meaning it allows a motor to draw locked-rotor current for approximately twenty seconds before tripping. The thermal mechanism suits applications with moderate acceleration times but will not protect circuits requiring faster electronic response or adjustable trip curves.

Current Range and Headroom

The replaceable element covers a full-load current range of 2.59 to 2.83 amperes and 3 to 3.28 amperes, with the catalogue rating spanning 3.08 to 3.36 amperes. It comfortably handles motors operating within these bands but runs out of headroom for loads exceeding the upper limit, requiring the next size element.

How it compares

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Price $43.99
Typical for this category: the median of 3,838 items is $41.99.

Specifications

Product
Brand nameEaton
Product typeIndustrial Electrical Controls & Automation
Product colorTransparent

Questions about this item

Which current range should I select for my motor's full-load amps?

Choose the 2.59–2.83 A range if your motor's full-load current falls there, or the 3–3.28 A range for slightly higher loads; the heater is rated 3.08–3.36 A overall.

What does Trip Class 20 mean for actual overload protection?

Trip Class 20 defines the maximum time the heater can carry an overload before tripping; it does not set a fixed trip current but governs the time-current curve.

Which starter series does the FH27 thermal unit fit?

The unit is compatible with Series A200 and B100 starters in NEMA Size 0, 1 and 2.

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