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Transparent thermal overload unit FH46 trip class 20

Eaton

Eaton FH46 Thermal Unit Trip Class 20 17.3 to 18.9 A

SKU CH-5FVC-MK81C

Thermal overload unit rated 17.3 to 18.9 A with trip class 20 for NEMA sizes 0, 1 and 2

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Trip Class 20 provides reliable overload protection
  • Full-load current range 17.3 to 18.9 A suits varied motors
  • Fits NEMA Size 0, 1 and 2 starters
  • Compatible with Series A200 and B100 contactors
  • Matches multiple Grainger and manufacturer part numbers

Eaton FH46 Thermal Unit for Motor Overload

This Eaton FH46 thermal unit provides overload protection for motor starters rated at NEMA sizes 0, 1 and 2. It is designed for full-load currents between 17.3 and 18.9 amperes and carries a trip class 20 rating. Maintenance teams and panel builders select it to safeguard industrial motor circuits against sustained overcurrent conditions.

Transparent Housing and Direct Compatibility

The transparent colour allows visual inspection of the element without removing the cover. It mounts directly into compatible Eaton Series A200 and B100 starters, matching the form factor of Grainger part numbers 11Z488 through 11Z497. This drop-in fit reduces installation time during scheduled replacements or emergency repairs.

Trip Class 20 Defines the Protection Profile

Trip class 20 determines how quickly the unit responds to overload current, making it the critical specification for matching the motor thermal curve. Select this unit only when the application requires a class 20 trip characteristic and the starter full-load current falls within the 17.3 to 18.9 A range.

Highlights

  • Trip Class 20 provides reliable overload protection
  • Full-load current range 17.3 to 18.9 A suits varied motors
  • Fits NEMA Size 0, 1 and 2 starters
  • Compatible with Series A200 and B100 contactors
  • Matches multiple Grainger and manufacturer part numbers

Specifications

BrandEaton
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

What trip class does the FH46 thermal unit use and what full-load current range does it cover?

The unit is rated Trip Class 20 and protects motors with a full-load current of 17.3 to 18.9 A.

Which NEMA starter sizes and series does the FH46 thermal unit fit?

It mounts in NEMA Size 0, 1 and 2 starters and is compatible with Series A200 and B100 devices.

How is the FH46 thermal unit installed and what common mistake should be avoided?

Snap the unit into the overload relay cavity of a compatible NEMA starter; the frequent error is selecting a heater that does not match the motor's exact full-load amperage.

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