GMC-400MA Equivalent & Substitute Parts Reference

Part Overview

The GMC-400MA is a 400 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 5mm x 20mm holder applications and provides medium-blow response characteristics. The part operates as a protective device in electrical circuits requiring 400 mA current limitation at 250 V AC rated voltage. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, fuse type, and response characteristics to ensure direct functional replacement in circuit protection applications.

Substiute Parts

GMC-400MA

Eaton - Electronics DivisionIn Stock: 772GMC-400MA Datasheet

Current PartRFQ

GMC-400-R

Eaton - Electronics DivisionIn Stock: 809GMC-400-R Datasheet

DirectRFQ

BK/GMC-400-R

Eaton - Electronics DivisionIn Stock: 1857BK/GMC-400-R Datasheet

Parametric EquivalentRFQ

BK1/GMC-400-R

Eaton - Electronics DivisionIn Stock: 1139BK1/GMC-400-R Datasheet

Parametric EquivalentRFQ

0034.2512

SCHURTER Inc.In Stock: 18950034.2512 Datasheet

Parametric EquivalentRFQ

20104000001P

Littelfuse Inc.In Stock: 69820104000001P Datasheet

Parametric EquivalentRFQ

20104000021P

Littelfuse Inc.In Stock: 75220104000021P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMC-400MA are grouped based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Core Matching Parameters:

• Current Rating: 400 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Medium Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these core parameters. Secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies vary among substitutes but do not prevent functional equivalence within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Eaton GMC Series (GMC-400-R, BK/GMC-400-R, BK1/GMC-400-R): These parts are direct manufacturer equivalents from Eaton - Electronics Division. All three variants maintain identical electrical and mechanical specifications with 400 mA current rating, 250 V AC voltage rating, and 5mm x 20mm package dimensions. All are ROHS3 compliant and carry UL approval. BK/GMC-400-R offers the highest inventory availability (1825 pcs). Selection among these three variants depends on specific packaging or certification requirements, as all are functionally equivalent.

SCHURTER 0034.2512: This part matches all core electrical and mechanical parameters. It provides additional DC voltage rating capability (125 V DC) and higher breaking capacity (80A) compared to Eaton variants. Operating temperature range is specified as -40°C to 85°C. ROHS3 compliant. Inventory availability is 1852 pcs. This part is suitable for applications requiring extended DC voltage protection or higher breaking capacity.

Littelfuse 201P Series (20104000001P, 20104000021P): Both Littelfuse parts meet core electrical and mechanical specifications with 400 mA current rating, 250 V AC voltage rating, and 5mm x 20mm package. Both carry cULus approval and are ROHS3 compliant. Operating temperature range is -25°C to 70°C. Breaking capacity is 80A. Inventory availability is 615 pcs (20104000001P) and 690 pcs (20104000021P). These parts are suitable for applications requiring cULus certification.

Frequently Asked Questions (FAQ)

Q: Can GMC-400-R, BK/GMC-400-R, and BK1/GMC-400-R be used interchangeably with GMC-400MA?

A: Yes. All three variants are manufactured by Eaton - Electronics Division and share identical electrical ratings (400 mA, 250 V AC), fuse type (cartridge, glass), package dimensions (5mm x 20mm), and response characteristics (medium blow). They are direct functional equivalents.

Q: What is the difference between the Eaton GMC variants and the SCHURTER 0034.2512?

A: The SCHURTER 0034.2512 provides additional DC voltage rating (125 V DC) and higher breaking capacity (80A versus 35A). The operating temperature range is also wider (-40°C to 85°C). Core electrical and mechanical parameters remain identical. Selection depends on whether extended DC protection or higher breaking capacity is required.

Q: Are Littelfuse 201P series parts (20104000001P, 20104000021P) compatible with GMC-400MA applications?

A: Yes. Both Littelfuse parts match the core electrical specifications (400 mA, 250 V AC), fuse type (cartridge, glass), and package dimensions (5mm x 20mm). They carry cULus approval. Operating temperature range is -25°C to 70°C. They are suitable for applications requiring cULus certification.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by exact matching of: current rating (400 mA), AC voltage rating (250 V), fuse type (cartridge, glass), package dimensions (5mm x 20mm), response time (medium blow), and mounting type (requires holder). All identified substitute parts meet these criteria.

Q: Does the difference in melting I²t values affect substitution suitability?

A: Melting I²t values vary among substitutes (0.18 to 0.632) but do not prevent functional equivalence within the specified electrical and mechanical constraints. The core current and voltage ratings remain identical across all parts.

Q: Which substitute part offers the highest inventory availability?

A: BK/GMC-400-R offers the highest inventory availability with 1825 pcs in stock, followed by SCHURTER 0034.2512 with 1852 pcs. Both are suitable for immediate procurement needs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (GMC-400-R, BK/GMC-400-R, BK1/GMC-400-R, 0034.2512, 20104000001P, 20104000021P) are ROHS3 compliant.