GMC-250MA Equivalent & Substitute Parts

Part Overview

The GMC-250MA is a 250 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 5mm x 20mm fuse holders and operates with a medium blow response time. The part is currently in active production status with 1009 pieces in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

GMC-250MA

Eaton - Electronics DivisionIn Stock: 1106GMC-250MA Datasheet

Current PartRFQ

GMC-250-R

Eaton - Electronics DivisionIn Stock: 1083GMC-250-R Datasheet

DirectRFQ

BK/GMC-250-R

Eaton - Electronics DivisionIn Stock: 1211BK/GMC-250-R Datasheet

Parametric EquivalentRFQ

BK1/GMC-250-R

Eaton - Electronics DivisionIn Stock: 1963BK1/GMC-250-R Datasheet

Parametric EquivalentRFQ

20102500001

Littelfuse Inc.In Stock: 72320102500001 Datasheet

Parametric EquivalentRFQ

20102500001P

Littelfuse Inc.In Stock: 104020102500001P Datasheet

Parametric EquivalentRFQ

20102500021

Littelfuse Inc.In Stock: 105120102500021 Datasheet

Parametric EquivalentRFQ

20102500021P

Littelfuse Inc.In Stock: 98120102500021P Datasheet

Parametric EquivalentRFQ

20102500301

Littelfuse Inc.In Stock: 72820102500301 Datasheet

Parametric EquivalentRFQ

20102500301P

Littelfuse Inc.In Stock: 73420102500301P Datasheet

Parametric EquivalentRFQ

MSC-250MA

OptiFuseIn Stock: 8425MSC-250MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GMC-250MA is determined by strict equivalence across the following critical parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating - AC: 250 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)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in breaking capacity, melting I²t, operating temperature range, and approval agencies are secondary parameters that do not prevent substitution but may influence selection based on application requirements and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are in active production status and comply with ROHS3 requirements. Selection among equivalent parts is based on the following criteria:

Eaton - Electronics Division Parts (GMC-250-R, BK/GMC-250-R, BK1/GMC-250-R): These parts maintain identical electrical and mechanical specifications to the GMC-250MA. Approval agencies include CSA, KC-MARK, and UL certifications. The BK1/GMC-250-R variant offers the highest inventory availability at 1922 pieces.

Littelfuse Inc. Parts (20102500001, 20102500001P, 20102500021, 20102500021P, 20102500301, 20102500301P): These parts meet all core electrical and mechanical requirements with cULus approval. Operating temperature range extends from -25°C to 70°C. Breaking capacity is rated at 80A. Melting I²t values range from 0.033 to 0.13 depending on part variant.

OptiFuse MSC-250MA: This part meets all core electrical and mechanical requirements with cULus and UL 248 approvals. Operating temperature range extends from -55°C to 125°C, providing broader environmental capability. Breaking capacity is rated at 100A with melting I²t of 0.1341.

All parts are suitable for direct substitution based on electrical and mechanical equivalence. Selection should account for approval agency requirements specific to the end application and regulatory jurisdiction.

Frequently Asked Questions (FAQ)

Q: Can GMC-250-R be used as a direct replacement for GMC-250MA?

A: Yes. GMC-250-R is a direct equivalent manufactured by Eaton - Electronics Division with identical current rating (250 mA), voltage rating (250 V AC), fuse type (Cartridge, Glass), package dimensions (5mm x 20mm), and response time (Medium Blow).

Q: What is the difference between Littelfuse 20102500021 and 20102500301 variants?

A: Both parts share identical electrical and mechanical specifications. The primary difference is the melting I²t value: 20102500021 has a melting I²t of 0.13, while 20102500301 has a melting I²t of 0.033. Both are approved for the same voltage and current ratings.

Q: Are Littelfuse and OptiFuse parts compatible with Eaton fuse holders?

A: All substitute parts maintain the identical 5mm x 20mm package dimensions and cartridge glass fuse type. Physical compatibility with standard 5mm x 20mm fuse holders is confirmed. Electrical compatibility is established through matching current rating (250 mA), voltage rating (250 V AC), and response time (Medium Blow).

Q: Which substitute part offers the widest operating temperature range?

A: The OptiFuse MSC-250MA operates across -55°C to 125°C, providing the broadest environmental capability compared to Littelfuse parts (-25°C to 70°C) and Eaton parts (operating temperature not specified).

Q: What approval agencies certify these substitute parts?

A: Eaton parts carry CSA, KC-MARK, and UL certifications. Littelfuse parts carry cULus certification. OptiFuse MSC-250MA carries cULus and UL 248 certifications. Selection should align with regulatory requirements for the specific application and jurisdiction.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting environmental and material restriction requirements.

Q: What is the difference between the "P" and non-"P" variants in the Littelfuse 201 series?

A: Both variants (20102500001 and 20102500001P, 20102500021 and 20102500021P, 20102500301 and 20102500301P) maintain identical electrical and mechanical specifications. The "P" designation indicates series classification (201P versus 201) but does not affect substitution compatibility.