GMA-7-R Equivalent & Substitute Parts Reference

Part Overview

The GMA-7-R is a 7 A 125 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in fuse holders with 5mm x 20mm cavity dimensions and is classified as Active product status. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in applications where the main part becomes unavailable or inventory constraints require alternative sourcing.

Substiute Parts

GMA-7-R

Eaton - Electronics DivisionIn Stock: 778GMA-7-R Datasheet

Current PartRFQ

BK/GMA-7-R

Eaton - Electronics DivisionIn Stock: 1874BK/GMA-7-R Datasheet

DirectRFQ

0235007.MXP

Littelfuse Inc.In Stock: 18660235007.MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GMA-7-R is determined by strict alignment of the following parameters:

Primary Substitution Criteria:

• Current Rating: 7 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Factors:

• Physical dimensions must conform to 0.205" Dia x 0.787" L specification
• Approval certifications must include UL and PSE as minimum requirements
• RoHS compliance status must be equivalent or superior

Parts meeting all primary criteria are classified as direct substitutes. Variations in breaking capacity, melting I²t, DC cold resistance, or operating temperature range do not disqualify substitution when primary electrical and mechanical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

BK/GMA-7-R (Eaton - Electronics Division)

The BK/GMA-7-R is a direct substitute for GMA-7-R. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings, mechanical dimensions, response characteristics, and approval certifications (CSA, PSE, UL). The BK/GMA-7-R carries ROHS3 compliance status compared to the base RoHS compliance of the GMA-7-R, representing an equivalent or superior environmental standard. This part is suitable for applications requiring seamless interchangeability with the original GMA-7-R specification.

0235007.MXP (Littelfuse Inc.)

The 0235007.MXP is a direct substitute for GMA-7-R from an alternative manufacturer. All primary substitution criteria are met: 7 A current rating, 125 V AC voltage rating, fast-blow glass cartridge fuse type, 5mm x 20mm package dimensions, and holder-based mounting. Approval certifications include PSE and UL; CE certification is also present. The 0235007.MXP exhibits higher breaking capacity (10 kA versus 200 A) and lower melting I²t (64.815 versus 150), which do not prevent substitution when primary electrical and mechanical parameters are identical. This part is suitable for applications where cross-manufacturer sourcing is acceptable and inventory availability is a consideration.

Frequently Asked Questions (FAQ)

Q: Can BK/GMA-7-R replace GMA-7-R in all applications?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and meet identical electrical ratings (7 A, 125 V AC), fuse type (fast-blow glass cartridge), and mechanical dimensions (5mm x 20mm). Approval certifications are equivalent. Direct replacement is supported.

Q: Is 0235007.MXP (Littelfuse) compatible with GMA-7-R?

A: Yes. The 0235007.MXP meets all primary substitution criteria: 7 A current rating, 125 V AC voltage rating, fast-blow glass cartridge fuse type, and 5mm x 20mm package dimensions. Approval certifications include PSE and UL. The part is mechanically and electrically compatible for direct substitution.

Q: What is the significance of the different breaking capacity values (200 A vs. 10 kA)?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The 0235007.MXP (10 kA) has higher breaking capacity than GMA-7-R (200 A). Both values exceed typical circuit protection requirements for 7 A, 125 V applications. This difference does not disqualify substitution when all primary electrical and mechanical parameters match.

Q: Why do the melting I²t values differ between GMA-7-R and 0235007.MXP?

A: Melting I²t is a thermal characteristic that reflects the fuse element's response to overcurrent. GMA-7-R has melting I²t of 150; 0235007.MXP has 64.815. Both parts are classified as fast-blow fuses with identical 7 A ratings and 125 V voltage ratings. The difference reflects manufacturing design variation between manufacturers and does not prevent substitution when primary electrical ratings and response time classification are identical.

Q: Are there any RoHS compliance differences between these parts?

A: GMA-7-R is RoHS Compliant. BK/GMA-7-R and 0235007.MXP are both ROHS3 Compliant. ROHS3 represents an updated compliance standard. All three parts meet environmental regulatory requirements; ROHS3 compliance is equivalent to or superior to base RoHS compliance.

Q: What approval certifications are required for substitution?

A: GMA-7-R carries CSA, PSE, and UL certifications. BK/GMA-7-R carries the same certifications. 0235007.MXP carries CE, PSE, and UL certifications. All three parts include PSE and UL certifications, which are the primary approval agencies for this fuse category. Substitution is supported across all three parts.

Q: Can these fuses be used without a holder?

A: No. All three parts (GMA-7-R, BK/GMA-7-R, and 0235007.MXP) require a fuse holder for operation. The mounting type is specified as "Requires Holder" for all parts. A compatible 5mm x 20mm fuse holder is necessary for installation.

Q: What is the DC cold resistance specification used for?

A: DC cold resistance is a measured electrical characteristic of the fuse element at room temperature. GMA-7-R and BK/GMA-7-R both have 0.012 Ohms; 0235007.MXP has 0.0157 Ohms. This parameter reflects manufacturing design differences and does not affect substitution eligibility when primary electrical ratings and fuse type are identical.