Littelfuse 0233004.M Glass Cartridge Fuse 4A 125VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0233004.M is a 4A 125VAC glass cartridge fuse with 5mm x 20mm dimensions, designed for circuits requiring medium-blow response protection. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts must match the core parameters: 4A current rating, 125V AC voltage rating, medium-blow response time, 5x20mm package, 10kA breaking capacity, and cartridge glass fuse type requiring a holder.

Substiute Parts

0233004.M

Littelfuse Inc.In Stock: 8730233004.M Datasheet

Current PartRFQ

0232004.MX125P

Littelfuse Inc.In Stock: 7550232004.MX125P Datasheet

Parametric EquivalentRFQ

0233004.MXBP

Littelfuse Inc.In Stock: 8430233004.MXBP Datasheet

Parametric EquivalentRFQ

0233004.MXF11P

Littelfuse Inc.In Stock: 11060233004.MXF11P Datasheet

Parametric EquivalentRFQ

0233004.MXF21P

Littelfuse Inc.In Stock: 9060233004.MXF21P Datasheet

Parametric EquivalentRFQ

0233004.MXP

Littelfuse Inc.In Stock: 51190233004.MXP Datasheet

Parametric EquivalentRFQ

BK/GMC-4-R

Eaton - Electronics DivisionIn Stock: 1019BK/GMC-4-R Datasheet

MFR RecommendedRFQ

BK1/GMC-4-R

Eaton - Electronics DivisionIn Stock: 766BK1/GMC-4-R Datasheet

MFR RecommendedRFQ

GMC-4-R

Eaton - Electronics DivisionIn Stock: 951GMC-4-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (4A), voltage rating (125V AC), fuse type (cartridge glass), package dimensions (5x20mm), response time (medium blow), and breaking capacity (10kA). All substitute parts listed maintain these core electrical and mechanical specifications.

Littelfuse series 233 substitutes (0233004.MXBP, 0233004.MXF11P, 0233004.MXF21P, 0233004.MXP) are direct parametric equivalents with active product status and enhanced RoHS3 compliance. The Littelfuse 0232004.MX125P (series 232) is a parametric equivalent with identical electrical ratings but different approval certifications. Eaton GMC series fuses (BK/GMC-4-R, BK1/GMC-4-R, GMC-4-R) are manufacturer-recommended alternatives from a different supplier, maintaining all core electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production continuity, Littelfuse series 233 variants (0233004.MXP, 0233004.MXBP, 0233004.MXF11P, 0233004.MXF21P) are preferred substitutes. These parts maintain identical electrical specifications while offering active product status and ROHS3 compliance. All series 233 variants carry comprehensive approval certifications including CE, CSA, KC, PSE, and UL.

The Littelfuse 0232004.MX125P (series 232) is an active parametric equivalent with identical electrical ratings. Approval certifications differ (CE, KC, PSE) compared to the original part, requiring compliance verification for specific applications.

Eaton GMC series fuses (GMC-4-R, BK/GMC-4-R, BK1/GMC-4-R) are manufacturer-recommended cross-manufacturer alternatives. These parts maintain all core electrical and mechanical parameters with active product status and ROHS3 compliance. Approval certifications include CSA, KC-MARK, MITI, and UL.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0233004.M with any of the listed substitutes?

A: Yes. All listed substitutes maintain identical current rating (4A), voltage rating (125V AC), response time (medium blow), package dimensions (5x20mm), and breaking capacity (10kA). Direct mechanical and electrical compatibility is confirmed.

Q: What is the difference between Littelfuse series 233 variants?

A: All series 233 variants (0233004.MXP, 0233004.MXBP, 0233004.MXF11P, 0233004.MXF21P) share identical electrical specifications and package dimensions. Differences exist in melting I²t values (51.61 for MXBP, MXF11P, MXF21P; 51.61 for MXP) and DC cold resistance (0.0293 Ohms for MXBP, MXF11P, MXF21P; 0.0293 Ohms for MXP). These variants are electrically interchangeable for the specified 4A 125V application.

Q: Why is 0232004.MX125P listed as a substitute if it is a different series?

A: Series 232 maintains all required electrical parameters: 4A current rating, 125V AC voltage rating, medium-blow response, 5x20mm package, and 10kA breaking capacity. Series designation does not affect functional equivalence for this application. Approval certifications differ and must be evaluated for specific regulatory requirements.

Q: Are Eaton GMC fuses compatible with Littelfuse fuse holders?

A: Eaton GMC series fuses maintain identical package dimensions (5x20mm) and cartridge glass fuse type. Mechanical compatibility with standard 5x20mm fuse holders is confirmed. Electrical specifications (4A, 125V AC, medium blow, 10kA breaking capacity) are identical.

Q: What is the inventory status of substitute parts?

A: Littelfuse 0233004.MXP has the highest inventory (5100 pcs). Other Littelfuse series 233 variants range from 783–1087 pcs. Littelfuse 0232004.MX125P has 729 pcs. Eaton GMC variants range from 662–940 pcs. All parts are listed as new original stock.

Q: Does the original part's RoHS non-compliance affect substitute selection?

A: The original 0233004.M is RoHS non-compliant. All active substitutes are ROHS3 compliant, meeting current regulatory requirements. For applications requiring RoHS compliance, any listed substitute is suitable.