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Transparent thermal overload unit with FH36 label and current ratings

Eaton

Eaton FH36 Cutler-Hammer Thermal Unit 6.84-7.45A

SKU CH-1GBB-PABEC

Thermal overload unit rated 6.84 to 7.45 A with trip class 20 for NEMA sizes 0, 1 and 2

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Thermal overload protection for motors up to 7.45 A full-load current
  • Trip Class 20 ensures reliable overload response across NEMA sizes 0, 1, 2
  • Compatible with Series A200 and B100 motor starters for direct replacement
  • Transparent housing allows visual inspection of thermal element condition
  • Matches multiple Grainger and manufacturer part numbers for easy cross-reference

Industrial Thermal Overload Unit

The Eaton FH36 Cutler-Hammer thermal unit provides Trip Class 20 overload protection for motor starters rated NEMA Size 0, 1 and 2. It covers full-load current ranges of 6 to 6.4 A and 6.9 to 7.5 A, matching the 6.84 to 7.45 A designation. Buyers needing a different trip class or a higher current range cannot use this device.

Sustained Overload Behaviour

Trip Class 20 means the unit allows a motor to carry an overload for up to 20 seconds before tripping, which suits applications with longer acceleration times. The thermal mechanism reacts to persistent heating rather than momentary peaks, so it resists nuisance trips during normal start-up. It is not designed for fast-trip Class 10 requirements or for instantaneous magnetic protection.

Thermal Operation and Compatibility

The transparent housing lets maintenance staff visually confirm the trip indicator without removing the unit. It fits directly into compatible Series A200 and B100 starters, including models such as B100J0B, B100M1C and B100W1B. No auxiliary power or external wiring is required for the thermal sensing function.

Highlights

  • Thermal overload protection for motors up to 7.45 A full-load current
  • Trip Class 20 ensures reliable overload response across NEMA sizes 0, 1, 2
  • Compatible with Series A200 and B100 motor starters for direct replacement
  • Transparent housing allows visual inspection of thermal element condition
  • Matches multiple Grainger and manufacturer part numbers for easy cross-reference

Specifications

BrandEaton
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

Does the FH36 thermal unit generate noticeable heat or noise when it carries 6.84 to 7.45 A continuously?

As a passive thermal overload element it has no fan or moving parts, so it runs silently; the only warmth comes from normal I²R losses at its rated 6.84–7.45 A range.

Which starter or contactor must I already own for this FH36 unit to plug into?

It is designed for Eaton Series A200 and B100 starters (models such as B100J0B, B100J0C, B100M0B, B100M0C, B100S0B, B100S0C, B100U0B, B100U0C, B100W0B, B100W0C and their 1B/1C variants) in NEMA sizes 0, 1 or 2.

Will the FH36 unit coordinate with the older B100 overload relays I already have in service?

Yes — the FH36 is a direct thermal-unit replacement for the B100 family (including part numbers 11Z488 through 11Z497), sharing the same Trip Class 20 characteristic and 6–6.4 A / 6.9–7.5 A full-load current bands.

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