GMC-6.3-R Equivalent & Substitute Parts

Part Overview

The GMC-6.3-R is a 6.3 A, 125 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in applications requiring medium-blow response characteristics and operates within a 5mm x 20mm form factor. The part is currently active in production with 1089 pieces in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this critical protective component.

Substiute Parts

GMC-6.3-R

Eaton - Electronics DivisionIn Stock: 1146GMC-6.3-R Datasheet

Current PartRFQ

BK/GMC-6.3-R

Eaton - Electronics DivisionIn Stock: 1809BK/GMC-6.3-R Datasheet

DirectRFQ

023306.3MXP

Littelfuse Inc.In Stock: 46282023306.3MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMC-6.3-R are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Current Rating: 6.3 A (exact match required)
• Voltage Rating (AC): 125 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)
• Breaking Capacity @ Rated Voltage: 10 kA (exact match required)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these electrical and mechanical requirements and are therefore functionally interchangeable within applications designed for the GMC-6.3-R.

Parameter Comparison

Engineering Selection Recommendations

BK/GMC-6.3-R (Eaton - Electronics Division): This part is a direct equivalent manufactured by the same supplier as the primary part. It maintains identical electrical specifications, mechanical dimensions, and approval certifications (CSA, KC-MARK, MITI, UL). Selection of this substitute is appropriate for applications where Eaton sourcing is preferred or required. Inventory availability is 1742 pieces.

023306.3MXP (Littelfuse Inc.): This part is a parametric equivalent manufactured by Littelfuse Inc. It meets all critical electrical and mechanical requirements including current rating, voltage rating, package dimensions, response time, and breaking capacity. The part holds active product status and carries broader approval certifications (CE, CSA, KC, PSE, UL). Inventory availability is significantly higher at 46200 pieces. DC cold resistance and melting I²t values differ from the primary part but remain within the functional requirements for this fuse category.

All three parts are ROHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-6.3-R be used as a direct replacement for GMC-6.3-R? A: Yes. BK/GMC-6.3-R is manufactured by the same supplier (Eaton - Electronics Division) and maintains identical electrical specifications, mechanical dimensions, response characteristics, and approval certifications. It is a direct equivalent.

Q: Is 023306.3MXP (Littelfuse) compatible with applications designed for GMC-6.3-R? A: Yes. The 023306.3MXP meets all critical electrical and mechanical parameters: 6.3 A current rating, 125 V AC voltage rating, 5mm x 20mm package dimensions, medium-blow response time, and 10 kA breaking capacity. It is functionally interchangeable.

Q: What are the differences between the Littelfuse 023306.3MXP and the Eaton GMC-6.3-R? A: The primary differences are manufacturer, DC cold resistance (0.0166 Ohms vs. 0.012 Ohms), melting I²t (151.905 vs. 110), and approval certifications. The Littelfuse part includes CE and PSE certifications in addition to CSA, KC, and UL. All critical functional parameters remain identical.

Q: Does the difference in melting I²t affect substitution compatibility? A: Melting I²t is a characteristic of the fuse element and does not affect the substitution decision when all other critical parameters match. Both parts are rated for 6.3 A at 125 V with medium-blow response and 10 kA breaking capacity.

Q: Are all three parts RoHS compliant? A: Yes. GMC-6.3-R, BK/GMC-6.3-R, and 023306.3MXP are all ROHS3 compliant.

Q: Which part should be selected for highest inventory availability? A: The 023306.3MXP (Littelfuse) offers the highest inventory availability at 46200 pieces, compared to 1742 pieces for BK/GMC-6.3-R and 1089 pieces for GMC-6.3-R.

Q: Do all parts require a fuse holder? A: Yes. All three parts are cartridge-type fuses that require a holder for installation. They are not panel-mount fuses.