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Transparent thermal overload unit with current rating markings

Eaton

Eaton MSH6-0A Thermal Unit 4.8-5.26 A Trip Class 20

SKU CH-WEXJ-ZJ8X3

Provides thermal overload protection for 4.8 to 5.26 A motors with Trip Class 20 response

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Thermal overload protection for 4.8–5.26 A motors
  • Trip Class 20 suits standard starting loads
  • Fits NEMA Size 1, 3, 4, 5 starters
  • Compatible with Series MS motor starters
  • Cross-references Grainger 1H385, 1H396, 1H397

Thermal Overload Unit 4.8-5.26 A

The Eaton MSH6-0A is a thermal overload unit rated for a full-load current range of 4.8 to 5.26 A. It provides Trip Class 20 protection for motor circuits in industrial control panels.

Replaces Compatible Series MS Heaters

This unit serves as a direct replacement for Series MS heater elements including models MST01, MST02 and their AH, DN, EH, FN, RN, SN variants. The upgrade is justified when an existing element has tripped or when the motor full-load current falls within the 4.8 to 5.26 A window.

Suits NEMA Size 1 3 4 5 Starters

The heater fits NEMA Size 1, 3, 4 and 5 starters and cross-references Grainger part numbers 1H385, 1H396 and 1H397. It is not suitable for applications requiring a different trip class, a current range outside 4.8 to 5.26 A, or non-Series MS mounting configurations.

How it compares

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Price $44.99
Typical for this category: the median of 3,838 items is $41.99.

Specifications

Product
Brand nameEaton
Product typeIndustrial Electrical Controls & Automation
Product colorTransparent

Questions about this item

Will the MSH6-0A fit my NEMA Size 3 starter?

Yes, the thermal unit is compatible with NEMA Size 1, 3, 4 and 5 starters.

How do I install the thermal unit and what step is often missed?

Insert the unit into the compatible Series MS overload relay until it clicks, then verify the 4.8 to 5.26 A rating matches your motor nameplate.

When should I replace the MSH6-0A thermal unit?

Replace the unit after it trips on overload, as the thermal element is single-use and cannot be reset.

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