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Transparent thermal unit with current rating markings

Eaton

Eaton FH32 Thermal Unit 4.82-5.26A

SKU CH-ZZDC-3MAHG

Thermal overload unit for NEMA sizes 0, 1 and 2, adjustable from 4.82 to 5.26 amps

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Reliable overload protection with Trip Class 20 thermal response
  • Accurate motor safeguarding across 4.08–4.39 A and 4.72–5.14 A ranges
  • Broad compatibility with NEMA Size 0, 1, 2 starters
  • Fits Series A200 and B100 contactor families
  • Direct replacement for multiple Grainger part references

Industrial Thermal Overload Unit

The Eaton FH32 is a thermal overload unit designed for motor protection in industrial control panels. It serves electricians and maintenance engineers who need reliable trip behaviour for NEMA size 0, 1 or 2 starters. The transparent housing allows visual inspection of the bi-metallic mechanism without removing the cover.

Sustained Current Response

Trip Class 20 defines how the unit reacts to prolonged overcurrent rather than momentary inrush. It carries 4.08 to 4.39 A or 4.72 to 5.14 A continuously and trips on sustained overload to protect downstream wiring. The thermal element mimics motor heating so protection remains consistent across repeated duty cycles.

Adjustable Range Selection

The decisive specification is the full-load current range of 4.82 to 5.26 A. Choose this unit only when the motor nameplate current falls inside that window; a motor drawing less or more requires a different dial setting or a separate catalogue number. Builders needing a wider or narrower band must select another thermal unit.

How it compares

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Price $44.99
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

Does the FH32 thermal unit generate noticeable heat or noise during continuous operation?

The FH32 is a passive thermal overload device with no moving parts, so it produces no audible noise and negligible heat beyond normal conduction through its terminals.

Which motor starter series must I already own for this FH32 unit to fit and function?

The FH32 is designed for direct compatibility with Eaton Series A200 and B100 motor starters in NEMA sizes 0, 1 and 2.

Will the FH32 work with older NEMA size 0 starters I already have installed?

Yes, the FH32 covers NEMA sizes 0, 1 and 2, so it fits existing size 0 starters as well as larger sizes.

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