GMC-3.5-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The GMC-3.5-R is a 3.5 A 125 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for circuit protection in applications requiring medium-blow response characteristics with a 5mm x 20mm form factor. The part maintains Active product status with full regulatory compliance across multiple approval agencies including UL, CSA, KC-MARK, and MITI. Substitute parts are identified when identical electrical and mechanical parameters are maintained across the same manufacturer's product line, ensuring direct interchangeability without circuit redesign or holder modification.

Substiute Parts

GMC-3.5-R

Eaton - Electronics DivisionIn Stock: 918GMC-3.5-R Datasheet

Current PartRFQ

BK/GMC-3.5-R

Eaton - Electronics DivisionIn Stock: 2625BK/GMC-3.5-R Datasheet

DirectRFQ

BK1/GMC-3.5-R

Eaton - Electronics DivisionIn Stock: 1927BK1/GMC-3.5-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMC-3.5-R are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following criteria:

Electrical Parameters (Must Match Exactly):

• Current Rating: 3.5 A
• Voltage Rating (AC): 125 V
• Response Time: Medium Blow
• Breaking Capacity @ Rated Voltage: 10 kA
• Melting I²t: 25
• DC Cold Resistance: 0.022 Ohms

Mechanical Parameters (Must Match Exactly):

• Fuse Type: Cartridge, Glass
• Package / Case: 5mm x 20mm
• Mounting Type: Requires Holder
• Size / Dimension: 0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Compliance Parameters (Must Match or Exceed):

• Approval Agency: CSA, KC-MARK, MITI, UL
• RoHS Status: ROHS3 Compliant

All identified substitutes maintain identical parameter specifications and are manufactured by Eaton - Electronics Division within the GMC series. No parameter deviation is permitted for substitution classification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—GMC-3.5-R, BK/GMC-3.5-R, and BK1/GMC-3.5-R—are electrically and mechanically equivalent and maintain Active product status. Selection among these parts may be based on inventory availability and lead time considerations:

• GMC-3.5-R: 837 pieces in stock
• BK/GMC-3.5-R: 2544 pieces in stock
• BK1/GMC-3.5-R: 1905 pieces in stock

All parts carry identical regulatory compliance certifications (UL, CSA, MITI) and ROHS3 compliance status. The BK/GMC-3.5-R variant offers the highest inventory availability. Selection should prioritize supply chain requirements without compromising electrical or mechanical performance, as all variants are fully interchangeable within the same circuit application and holder assembly.

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-3.5-R be used as a direct replacement for GMC-3.5-R?

A: Yes. BK/GMC-3.5-R is a direct substitute. All electrical parameters (current rating, voltage rating, response time, breaking capacity, melting I²t, and DC cold resistance) are identical. All mechanical parameters (fuse type, package dimensions, and mounting requirements) are identical. No circuit modification or holder change is required.

Q: What is the difference between GMC-3.5-R and BK1/GMC-3.5-R?

A: Both parts are electrically and mechanically equivalent. The only documented difference is in the approval agency certifications: BK1/GMC-3.5-R lists KC certification instead of KC-MARK. Both maintain UL, CSA, and MITI approvals. This distinction does not affect electrical performance or mechanical compatibility.

Q: Are these fuses compatible with existing 5mm x 20mm fuse holders?

A: Yes. All three parts share identical mechanical specifications: 0.205" diameter x 0.787" length (5.20mm x 20.00mm). They are designed for use with standard 5mm x 20mm cartridge fuse holders and require no holder modification.

Q: What does "Medium Blow" response time mean?

A: Medium Blow indicates the fuse's thermal response characteristic. This fuse will open under sustained overcurrent conditions at a rate between fast-blow and slow-blow fuses, providing protection against circuit faults while allowing brief inrush currents typical in many industrial and commercial applications.

Q: Are all three parts ROHS3 compliant?

A: Yes. GMC-3.5-R, BK/GMC-3.5-R, and BK1/GMC-3.5-R all carry ROHS3 Compliant status, meeting environmental and material restriction requirements for electronic components.

Q: Which part should I select based on availability?

A: BK/GMC-3.5-R offers the highest inventory level at 2544 pieces in stock, followed by BK1/GMC-3.5-R at 1905 pieces, and GMC-3.5-R at 837 pieces. For applications with no specific part number requirement, BK/GMC-3.5-R provides the best supply assurance.