GMC-7A Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The GMC-7A is a 7 A, 125 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete and requires a fuse holder for mounting. The GMC-7A operates with medium blow response characteristics and is designed for 5mm x 20mm form factor applications. Due to its obsolete product status, identification of active equivalent parts is necessary to ensure continued availability and compliance with current manufacturing standards.

Substiute Parts

GMC-7A

Eaton - Electronics DivisionIn Stock: 1130GMC-7A Datasheet

Current PartRFQ

GMC-7-R

Eaton - Electronics DivisionIn Stock: 951GMC-7-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GMC-7A is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Current Rating: 7 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Response Time: Medium Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 200 A (exact match required)
• Melting I²t: 150 (exact match required)
• DC Cold Resistance: 0.012 Ohms (exact match required)

The GMC-7-R is identified as a direct substitute based on complete alignment with all critical electrical and mechanical parameters. Both components share identical current, voltage, fuse type, package dimensions, response characteristics, and thermal properties.

Parameter Comparison

Engineering Selection Recommendations

The GMC-7-R is the direct equivalent substitute for the obsolete GMC-7A. Selection of GMC-7-R is based on the following engineering factors:

Product Status: The GMC-7A is classified as obsolete, while GMC-7-R maintains active product status, ensuring continued availability and manufacturer support.

Regulatory Compliance: GMC-7-R achieves ROHS3 compliance, whereas GMC-7A is RoHS non-compliant. For applications subject to RoHS requirements, GMC-7-R is the appropriate selection.

Certification Alignment: Both components carry MITI approval. GMC-7-R includes UL certification, while GMC-7A carries UR certification. The UL certification of GMC-7-R provides broader recognition in North American markets.

Electrical and Mechanical Equivalence: All critical parameters—current rating, voltage rating, fuse type, package dimensions, response time, breaking capacity, melting I²t, and DC cold resistance—are identical between GMC-7A and GMC-7-R, ensuring direct functional interchangeability within existing fuse holder assemblies.

Frequently Asked Questions (FAQ)

Q: Can GMC-7-R be used as a direct replacement for GMC-7A in existing applications?

A: Yes. GMC-7-R is electrically and mechanically equivalent to GMC-7A. Both components share identical current rating (7 A), voltage rating (125 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium blow), breaking capacity (200 A), melting I²t (150), and DC cold resistance (0.012 Ohms). GMC-7-R is compatible with any fuse holder designed for the 5mm x 20mm GMC series cartridge.

Q: What is the difference between GMC-7A and GMC-7-R?

A: The primary differences are product status and compliance. GMC-7A is obsolete and RoHS non-compliant, while GMC-7-R is active and ROHS3 compliant. GMC-7A carries UR certification; GMC-7-R carries UL certification. All electrical and mechanical specifications are identical.

Q: Does GMC-7-R require the same fuse holder as GMC-7A?

A: Yes. Both GMC-7A and GMC-7-R are 5mm x 20mm cartridge fuses requiring a compatible fuse holder. No holder modifications or upgrades are necessary when substituting GMC-7-R for GMC-7A.

Q: Is GMC-7-R suitable for RoHS-compliant applications?

A: Yes. GMC-7-R is ROHS3 compliant and is the appropriate selection for applications subject to RoHS requirements. GMC-7A is RoHS non-compliant and should not be used in RoHS-regulated applications.

Q: Are there any performance differences between GMC-7A and GMC-7-R?

A: No. Both components have identical electrical performance characteristics, including current rating, voltage rating, response time, breaking capacity, melting I²t, and DC cold resistance. Performance is equivalent across all specified parameters.