GMC-8A Equivalent & Substitute Parts Reference

Part Overview

The GMC-8A is a glass cartridge fuse manufactured by Eaton - Electronics Division, rated for 8 A at 125 V AC/DC with a 5mm x 20mm form factor. This component is classified as obsolete, indicating discontinued production and limited availability in standard distribution channels. The GMC-8A requires a dedicated fuse holder for installation and operates with medium blow response characteristics. Identification of equivalent substitute parts is necessary to ensure continued circuit protection capability and system reliability when original inventory is depleted.

Substiute Parts

GMC-8A

Eaton - Electronics DivisionIn Stock: 1034GMC-8A Datasheet

Current PartRFQ

GMC-8-R

Eaton - Electronics DivisionIn Stock: 677GMC-8-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GMC-8A is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 8 A (exact match required)
• Voltage Rating: 125 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Physical Form Factor: 5mm x 20mm (exact match required)
• Response Characteristic: Medium Blow (exact match required)
• Breaking Capacity: 200 A @ rated voltage (exact match required)
• Melting I²t: 200 (exact match required)
• DC Cold Resistance: 0.009 Ohms (exact match required)

The GMC-8-R qualifies as a direct substitute based on identical electrical specifications and mechanical dimensions. Both components are manufactured by Eaton - Electronics Division and belong to the GMC series. The primary distinction is product status: GMC-8A is obsolete while GMC-8-R is active production, and RoHS compliance status differs between the two variants.

Parameter Comparison

Engineering Selection Recommendations

The GMC-8-R is the direct equivalent substitute for the GMC-8A based on identical electrical and mechanical specifications. Selection of GMC-8-R is supported by the following factors:

Product Status: GMC-8-R maintains active production status, ensuring availability and supply chain continuity. GMC-8A is obsolete and subject to inventory depletion.

Regulatory Compliance: GMC-8-R carries ROHS3 compliance certification, meeting current environmental and material restriction requirements. GMC-8-R also carries UL approval in addition to MITI certification, providing broader regulatory recognition compared to the GMC-8A.

Electrical Equivalence: All critical electrical parameters—current rating, voltage rating, breaking capacity, melting I²t, and DC cold resistance—are identical between GMC-8A and GMC-8-R, ensuring equivalent circuit protection performance.

Mechanical Compatibility: Both components share identical physical dimensions (5mm x 20mm) and mounting requirements, confirming direct mechanical interchangeability in existing fuse holder installations.

Frequently Asked Questions (FAQ)

Q: Can GMC-8-R be used as a direct replacement for GMC-8A in existing circuits?

A: Yes. GMC-8-R is electrically and mechanically equivalent to GMC-8A. All critical parameters—current rating (8 A), voltage rating (125 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response time (medium blow), breaking capacity (200 A), and DC cold resistance (0.009 Ohms)—are identical. GMC-8-R will function identically in any application designed for GMC-8A.

Q: What is the difference between GMC-8A and GMC-8-R?

A: The primary differences are product status and compliance certifications. GMC-8A is obsolete production, while GMC-8-R is active production. GMC-8-R carries ROHS3 compliance and UL approval, whereas GMC-8A is RoHS non-compliant and carries UR approval. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when substituting GMC-8-R for GMC-8A?

A: No compatibility concerns exist. Both components require the same fuse holder type and are physically and electrically interchangeable. The 5mm x 20mm form factor is standard across both parts.

Q: Why is GMC-8A listed as obsolete?

A: Obsolete status indicates that Eaton - Electronics Division has discontinued production of this component. GMC-8-R represents the current production equivalent and should be used for new designs and replacement applications.

Q: Does RoHS compliance status affect functional performance?

A: RoHS compliance status reflects material composition and environmental standards but does not affect electrical performance or circuit protection capability. GMC-8-R's ROHS3 compliance ensures compliance with current environmental regulations while maintaining identical electrical specifications.