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Transparent thermal overload unit with trip class 20 marking

Eaton

Eaton FH18 Thermal Unit Trip Class 20

SKU CH-VWNK-K2W96

Thermal overload unit rated 1.12–1.41 A with trip class 20 for NEMA sizes 0–2 starters

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Trip Class 20 overload protection prevents motor damage
  • Full-load current range 1.12 to 1.41 A covers multiple motors
  • Compatible with NEMA sizes 0, 1 and 2 starters
  • Fits Series A200 and B100 contactors directly
  • Matches Grainger part numbers 11Z488 through 11Z497

Eaton FH18 Thermal Unit

The Eaton FH18 thermal unit provides overload protection for NEMA size 0, 1 and 2 starters. It suits maintenance engineers and panel builders who need a direct replacement for Series A200 or B100 motor controllers.

Trip Class 20 replacement

This unit replaces thermal elements that have drifted out of calibration or failed after extended service. The upgrade is worthwhile when the existing starter trips inconsistently or shows discoloration around the heater coil.

Sustained load behaviour

Trip Class 20 allows the element to carry moderate overloads for longer periods before opening, matching the thermal inertia of typical industrial motors. Under continuous duty the transparent housing lets technicians verify element condition without removing the cover.

Highlights

  • Trip Class 20 overload protection prevents motor damage
  • Full-load current range 1.12 to 1.41 A covers multiple motors
  • Compatible with NEMA sizes 0, 1 and 2 starters
  • Fits Series A200 and B100 contactors directly
  • Matches Grainger part numbers 11Z488 through 11Z497

Specifications

BrandEaton
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

What current ranges does the FH18 thermal unit cover for NEMA sizes 0, 1 and 2?

The unit handles full-load currents of 1.12 to 1.22 A and 1.29 to 1.41 A across NEMA sizes 0, 1 and 2.

Which Eaton series starters accept the FH18 thermal unit for installation?

The FH18 fits directly into Eaton Series A200 and B100 starters without modification.

When should the FH18 thermal unit be replaced after a trip event?

Replace the unit after it has tripped at its Class 20 rating, as the thermal element is single-use.

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