Equivalent & Substitute Parts for GMC-3.5A Glass Fuse Cartridge

Part Overview

The GMC-3.5A is a 3.5 A 125 V AC DC glass fuse cartridge manufactured by Eaton - Electronics Division. This component is designed for use in 5mm x 20mm fuse holders and provides circuit protection through medium-blow response characteristics. The part is currently in active production with 1041 pieces available in new original stock condition. Identifying equivalent and substitute parts is necessary to ensure supply chain continuity, optimize procurement across multiple manufacturers, and maintain design flexibility in circuit protection applications.

Substiute Parts

GMC-3.5A

Eaton - Electronics DivisionIn Stock: 1146GMC-3.5A Datasheet

Current PartRFQ

GMC-3.5-R

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

DirectRFQ

BK/GMC-3.5-R

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

Parametric EquivalentRFQ

BK1/GMC-3.5-R

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

Parametric EquivalentRFQ

023303.5MXBP

Littelfuse Inc.In Stock: 963023303.5MXBP Datasheet

Parametric EquivalentRFQ

023303.5MXP

Littelfuse Inc.In Stock: 1015023303.5MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GMC-3.5A is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 3.5 A
• Voltage Rating - AC: 125 V
• Fuse Type: Cartridge, Glass
• Package / Case: 5mm x 20mm
• Response Time: Medium Blow
• Breaking Capacity @ Rated Voltage: 10kA
• Mounting Type: Requires Holder

All identified substitute parts meet these mandatory criteria. Substitute parts are grouped into two manufacturer categories: Eaton - Electronics Division (GMC series variants) and Littelfuse Inc. (233 series). Within each manufacturer group, parts are functionally interchangeable based on the parameters listed above.

Parameter Comparison

Engineering Selection Recommendations

Eaton GMC Series (GMC-3.5-R, BK/GMC-3.5-R, BK1/GMC-3.5-R): All three Eaton variants are active products with identical electrical specifications and certifications (CSA, KC-MARK, MITI, UL). These parts are direct substitutes for the GMC-3.5A. Selection among these variants should be based on packaging requirements and inventory availability. BK/GMC-3.5-R offers the highest current inventory at 2544 pieces.

Littelfuse 233 Series (023303.5MXP, 023303.5MXBP): Both Littelfuse parts meet all mandatory electrical parameters and are active products. These parts carry expanded certifications including CE and PSE in addition to CSA, KC, and UL. Operating temperature range is specified as -55°C to 125°C. DC cold resistance and melting I²t values differ from Eaton parts but remain within the functional equivalence criteria. Selection of Littelfuse parts is appropriate when expanded temperature operating range or additional regulatory certifications are required.

Compliance Status: All substitute parts are ROHS3 compliant and REACH unaffected. All parts carry EAR99 ECCN classification and 8536.10.0020 HTSUS code.

Frequently Asked Questions (FAQ)

Q: Can GMC-3.5-R be used as a direct replacement for GMC-3.5A? A: Yes. GMC-3.5-R is a direct substitute. Both parts share identical current rating (3.5 A), voltage rating (125 V AC), fuse type (cartridge, glass), package dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (10kA).

Q: What is the difference between Eaton GMC variants (GMC-3.5-R, BK/GMC-3.5-R, BK1/GMC-3.5-R)? A: All three Eaton variants are electrically and mechanically identical. Differences are limited to packaging designation and inventory levels. Selection should be based on procurement requirements and available stock.

Q: Can Littelfuse 023303.5MXP or 023303.5MXBP replace GMC-3.5A? A: Yes. Both Littelfuse parts meet all mandatory substitution parameters. DC cold resistance (0.0322 Ohms vs. 0.022 Ohms) and melting I²t (36.275 vs. 25) differ but do not affect functional equivalence for circuit protection applications. Littelfuse parts offer expanded operating temperature range (-55°C to 125°C) and additional certifications (CE, PSE).

Q: Are there packaging differences between substitute parts? A: All substitute parts use identical 5mm x 20mm cartridge dimensions and require the same fuse holder. Packaging designation (Bulk) is consistent across all parts.

Q: What certifications apply to all substitute parts? A: All parts carry CSA, KC, MITI, and UL certifications. Littelfuse parts additionally carry CE and PSE certifications.

Q: Which substitute part offers the best inventory availability? A: BK/GMC-3.5-R offers the highest inventory with 2544 pieces in stock.