BK/GMC-100-R Equivalent & Substitute Parts

Part Overview

The BK/GMC-100-R is a 100 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for applications requiring medium-blow response characteristics in a 5mm x 20mm form factor and requires a compatible holder for installation. The part is currently active in production with 785 pieces in stock. Equivalent substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional performance parameters to ensure direct interchangeability in circuit protection applications.

Substiute Parts

BK/GMC-100-R

Eaton - Electronics DivisionIn Stock: 828BK/GMC-100-R Datasheet

Current PartRFQ

20101000021P

Littelfuse Inc.In Stock: 105320101000021P Datasheet

Parametric EquivalentRFQ

MSC-100MA

OptiFuseIn Stock: 3713MSC-100MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/GMC-100-R are qualified based on the following critical parameters that determine functional interchangeability:

Electrical Parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Medium Blow (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (minimum requirement)

All identified substitute parts meet these criteria and are therefore suitable for direct replacement in applications originally specified for the BK/GMC-100-R.

Parameter Comparison

Engineering Selection Recommendations

All three parts—BK/GMC-100-R, 20101000021P, and MSC-100MA—are active products with ROHS3 compliance and meet the core electrical and mechanical requirements for 100 mA, 250 V AC/DC glass cartridge fuse applications in 5mm x 20mm form factor.

BK/GMC-100-R (Eaton): Primary part with CSA, KC-MARK, and UL certifications. Suitable for applications requiring these specific approval agencies.

20101000021P (Littelfuse): Parametric equivalent with cULus certification and operating temperature range of -25°C to 70°C. Breaking capacity of 80A provides higher fault protection margin than the primary part.

MSC-100MA (OptiFuse): Parametric equivalent with cULus and UL 248 certifications and extended operating temperature range of -55°C to 125°C. Breaking capacity of 100A provides the highest fault protection margin among the three options.

Selection between these parts should be based on required approval agencies, operating temperature environment, and breaking capacity requirements for the specific application.

Frequently Asked Questions (FAQ)

Q: Can 20101000021P or MSC-100MA be used as direct replacements for BK/GMC-100-R?

A: Yes. Both parts are parametric equivalents with identical current rating (100 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (medium blow), and mechanical dimensions (5mm x 20mm). All three parts require a compatible holder and are ROHS3 compliant.

Q: What are the differences between the three parts?

A: The primary differences are manufacturer, approval agencies, breaking capacity, melting I²t characteristics, and operating temperature range. Breaking capacity values are 35A (Eaton), 80A (Littelfuse), and 100A (OptiFuse). Operating temperature ranges are not specified (Eaton), -25°C to 70°C (Littelfuse), and -55°C to 125°C (OptiFuse).

Q: Does the difference in breaking capacity affect substitution?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. Higher breaking capacity provides greater protection margin in high-fault-current environments. Selection should align with the application's fault current requirements and system design specifications.

Q: Are all three parts compatible with the same holder?

A: Yes. All three parts share identical mechanical dimensions (0.205" Dia x 0.787" L / 5.20mm x 20.00mm) and mounting type (requires holder), ensuring compatibility with standard 5mm x 20mm fuse holders.

Q: Which part should be selected for extended temperature applications?

A: MSC-100MA offers the widest operating temperature range (-55°C to 125°C), making it suitable for applications requiring operation across extreme temperature environments. 20101000021P is rated for -25°C to 70°C. Operating temperature specifications for BK/GMC-100-R are not provided.

Q: Are all parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.