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Transparent Eaton FH47 thermal unit trip class 20

Eaton

Eaton FH47 Thermal Unit Trip Class 20

SKU CH-7FKK-XDE1P

Thermal overload unit rated 16.4 to 20.8 A, trip class 20, fits NEMA sizes 0 to 2 and compatible B100 and A200 series starters

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Thermal overload protection for motors rated 16.4 to 18 A
  • Trip Class 20 response suits standard motor starting profiles
  • Fits NEMA sizes 0, 1 and 2 starters
  • Compatible with Series A200 and B100 contactors
  • Transparent housing allows visual inspection of trip status

Eaton FH47 Thermal Unit

The Eaton FH47 is a thermal overload unit rated Trip Class 20 and designed for NEMA sizes 0, 1 and 2. It provides thermal protection for motor starters in industrial electrical control panels.

Suitable for and alternatives

This unit suits maintenance teams replacing a thermal element in compatible Series A200 or B100 starters with full-load currents between 16.4 and 20.8 A. It does not fit starters outside the listed NEMA sizes or current ranges, nor does it serve applications requiring magnetic or electronic trip types.

Deciding specification

The critical value is the Trip Class 20 rating combined with the 16.4 to 20.8 A full-load current window; both must match the starter nameplate for correct overload coordination.

Highlights

  • Thermal overload protection for motors rated 16.4 to 18 A
  • Trip Class 20 response suits standard motor starting profiles
  • Fits NEMA sizes 0, 1 and 2 starters
  • Compatible with Series A200 and B100 contactors
  • Transparent housing allows visual inspection of trip status

Specifications

BrandEaton
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

Which starter series must I already have for this FH47 thermal unit to fit?

It fits Eaton Series A200 and B100 starters, matching NEMA sizes 0, 1 and 2.

Will this Class 20 unit coordinate with an older Class 10 heater on the same motor circuit?

No, the Class 20 trip curve is slower; mixing classes on one motor can cause nuisance trips or missed protection.

After wiring the FH47, what current reading confirms it is set for the 16.4 to 18 A range?

Measure motor full-load current; if it falls between 16.4 and 18 amps the unit will trip correctly at its rated Class 20 time.

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