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Transparent thermal unit with current rating markings

Eaton

Eaton FH35 Cutler-Hammer Thermal Unit 6.27-6.83A

SKU CH-0HX0-9EJV6

Thermal overload unit rated 6.27 to 6.83 amps with trip class 20 for NEMA sizes 0, 1 and 2

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Protects motors with Trip Class 20 thermal overload response
  • Covers full-load currents from 5.4 to 6.8 A across two ranges
  • Fits NEMA Size 0, 1 and 2 starter enclosures
  • Works with Series A200 and B100 motor starters
  • Replaces Grainger parts 11Z488 through 11Z497 for easy sourcing

Eaton FH35 Thermal Unit

The Eaton FH35 Cutler-Hammer thermal unit provides overload protection for motor starters in the 6.27 to 6.83 ampere range. It suits maintenance engineers and plant operators replacing a tripped element in existing NEMA Size 0, 1, or 2 equipment.

Trip Class 20 Limits

This unit operates at Trip Class 20, meaning it tolerates sustained overloads longer than Class 10 or Class 5 devices before tripping. The thermal mechanism responds to heater temperature rather than instantaneous current spikes, so it will not protect against short circuits.

Direct Replacement Install

Installation consists of snapping the transparent unit into the designated slot on a compatible Series A200 or B100 starter. The most common error is selecting a unit whose full-load current band does not match the motor nameplate rating, which causes nuisance trips or failed protection.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $48.99
Pricier than about 55% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameEaton
Product typeIndustrial Electrical Controls & Automation
Product colorTransparent

Questions about this item

Should I choose the 6.27-6.83 A or the 5.4-5.9 A thermal unit for my starter?

Select the 6.27-6.83 A unit when the motor full-load current falls in that range; use the 5.4-5.9 A unit for lower currents. Both fit NEMA sizes 0, 1, 2 and Trip Class 20.

What does Trip Class 20 mean for overload response in my motor circuit?

Trip Class 20 allows up to 20 seconds at six times rated current before the thermal unit trips, giving motors with longer acceleration time protection without nuisance shutdowns.

Which starter series does the FH35 thermal unit work with?

The FH35 is compatible with Eaton Series A200 and B100 starters, including models such as B100J0B, B100M1C, B100S0B and B100W1C.

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