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Transparent Eaton FH44 thermal unit rectangular block

Eaton

Eaton FH44 Thermal Unit 13.60-14.90A

SKU CH-5M3A-2QK4R

Thermal overload unit for NEMA 0, 1, 2 starters, trip class 20, 13.60-14.90 A range

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Reliable overload protection with Trip Class 20 thermal response
  • Accurate motor safeguarding for 13.60 to 14.90 A full-load current
  • Broad compatibility across NEMA Size 0, 1 and 2 starters
  • Direct fit for Series A200 and B100 contactor ranges
  • Transparent housing allows quick visual inspection of trip status

Eaton FH44 Thermal Unit for Motor Protection

This Eaton FH44 thermal unit provides overload protection for motor starters and contactors. It operates as a Trip Class 20 device with a current range of 13.60 to 14.90 amperes. The transparent housing allows visual inspection of the internal mechanism. It is designed for industrial electrical control panels and automation systems.

Suitable for NEMA Size 0 1 2 Starters

This unit fits Series A200 and B100 motor starters requiring thermal overload protection in the specified current range. It matches applications where the full load current falls between 12.5 to 13.5 amperes or 14.4 to 15.7 amperes. Buyers protecting motors outside this amperage window or using different starter series should select an alternative thermal unit.

Trip Class 20 Defines Response Time

The single specification that decides fit is the Trip Class 20 rating combined with the 13.60 to 14.90 ampere range. This class determines how quickly the unit trips under overload conditions. Verify the motor starter series and exact full load current before installation to ensure correct protection coordination.

Highlights

  • Reliable overload protection with Trip Class 20 thermal response
  • Accurate motor safeguarding for 13.60 to 14.90 A full-load current
  • Broad compatibility across NEMA Size 0, 1 and 2 starters
  • Direct fit for Series A200 and B100 contactor ranges
  • Transparent housing allows quick visual inspection of trip status

Specifications

BrandEaton
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

What NEMA starter sizes does the FH44 thermal unit fit?

The FH44 thermal unit is compatible with NEMA Size 0, 1 and 2 starters, matching the overload relay mounting pattern for those frame sizes.

How is the FH44 thermal unit installed in the starter, and what step is often missed?

Snap the unit into the overload relay base on the starter, then verify the dial is set to the motor full-load current within the 13.60–14.90 A range before closing the enclosure.

When should the FH44 thermal unit be replaced after a trip event?

Replace the unit if it has tripped repeatedly or shows discolouration, because the bimetal elements fatigue after repeated thermal cycling and will not hold the 13.60–14.90 A calibration.

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