GMC-100-R Equivalent & Substitute Parts Reference

Part Overview

The 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. The part is Active status and widely used in industrial and commercial electrical protection circuits. Substitute parts are identified when inventory constraints, lead time requirements, or supply chain considerations necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

GMC-100-R

Eaton - Electronics DivisionIn Stock: 1061GMC-100-R Datasheet

Current PartRFQ

BK/GMC-100-R

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

DirectRFQ

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 GMC-100-R are qualified based on the following criteria:

Electrical Parameters (Must Match):

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

Mechanical Parameters (Must Match):

• Fuse Type: Cartridge, Glass
• Package / Case: 5mm x 20mm
• Mounting Type: Requires Holder

Compliance Parameters (Must Match or Exceed):

• RoHS Status: ROHS3 Compliant
• Approval Agencies: CSA, KC-MARK, UL, or cULus

All identified substitutes meet these core requirements. Variations in Breaking Capacity, Melting I²t, and Operating Temperature are permitted within the scope of this product category, as these parameters do not affect basic interchangeability in standard holder applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Direct Equivalent): BK/GMC-100-R from Eaton - Electronics Division is the direct manufacturer equivalent. This part shares identical electrical specifications, mechanical dimensions, and melting characteristics with the GMC-100-R. Both parts carry the same approval agencies (CSA, KC-MARK, UL) and RoHS3 compliance status. Selection of BK/GMC-100-R is appropriate when Eaton sourcing is required or preferred.

Secondary Selection (Parametric Equivalent - Higher Breaking Capacity): 20101000021P from Littelfuse Inc. meets all core electrical and mechanical requirements. This part features a higher Breaking Capacity (80A versus 35A) and extended Operating Temperature range (-25°C ~ 70°C). The Melting I²t value (0.022) is higher than the original specification (0.0094). This part carries cULus certification. Selection is appropriate for applications where enhanced breaking capacity is beneficial and operating temperature range is within specified limits.

Tertiary Selection (Parametric Equivalent - Highest Breaking Capacity): MSC-100MA from OptiFuse meets all core electrical and mechanical requirements. This part features the highest Breaking Capacity (100A) and the widest Operating Temperature range (-55°C ~ 125°C). The Melting I²t value (0.01227) is closer to the original specification than the Littelfuse part. This part carries cULus and UL 248 certifications. Selection is appropriate for applications requiring maximum breaking capacity and extended temperature performance.

All substitute parts are Active status and ROHS3 compliant. Selection among these options depends on availability, supply chain requirements, and application-specific performance needs within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-100-R be used as a direct replacement for GMC-100-R? A: Yes. BK/GMC-100-R is a direct manufacturer equivalent from Eaton - Electronics Division with identical electrical specifications (100 mA, 250 V AC), mechanical dimensions (5mm x 20mm), response time (Medium Blow), and melting characteristics (0.0094 I²t). Both parts require a holder and carry the same approval agencies.

Q: What is the difference between the Littelfuse 20101000021P and OptiFuse MSC-100MA substitutes? A: Both parts meet the core electrical requirements (100 mA, 250 V AC, Medium Blow, 5mm x 20mm). The primary differences are: Littelfuse 20101000021P has 80A Breaking Capacity and -25°C ~ 70°C Operating Temperature; OptiFuse MSC-100MA has 100A Breaking Capacity and -55°C ~ 125°C Operating Temperature. The Melting I²t values also differ (0.022 for Littelfuse, 0.01227 for OptiFuse).

Q: Are all substitute parts compatible with existing GMC-100-R holders? A: Yes. All substitute parts share the identical 5mm x 20mm package dimensions and Cartridge, Glass fuse type. All require a holder for mounting. Physical compatibility with existing holders is confirmed.

Q: Do all substitute parts have the same approval certifications? A: No. GMC-100-R and BK/GMC-100-R carry CSA, KC-MARK, and UL certifications. Littelfuse 20101000021P carries cULus certification. OptiFuse MSC-100MA carries cULus and UL 248 certifications. Application requirements may dictate which certifications are necessary.

Q: Can I use a substitute part with higher Breaking Capacity in place of GMC-100-R? A: Yes. Higher Breaking Capacity (80A or 100A) does not compromise circuit protection function. The fuse will still operate at the specified 100 mA current rating and 250 V voltage rating. Enhanced breaking capacity provides additional safety margin in fault conditions.

Q: What does "Requires Holder" mean for mounting type? A: All four parts in this comparison are cartridge fuses that must be installed in a dedicated fuse holder. They are not panel-mount or surface-mount components. The holder provides electrical contact and mechanical retention.

Q: Are all parts RoHS3 compliant? A: Yes. All four parts (GMC-100-R, BK/GMC-100-R, 20101000021P, and MSC-100MA) are ROHS3 compliant.