Equivalent & Substitute Parts for 0237004.M

Part Overview

The Littelfuse 0237004.M is a 4 A 125 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor, rated for medium blow response. This part is classified as obsolete and requires a fuse holder for installation. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for ongoing system maintenance and new designs.

Substiute Parts

0237004.M

Littelfuse Inc.In Stock: 10370237004.M Datasheet

Current PartRFQ

0233004.MXP

Littelfuse Inc.In Stock: 51190233004.MXP Datasheet

MFR RecommendedRFQ

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

BK/GMC-4-R

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

Parametric EquivalentRFQ

BK1/GMC-4-R

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

Parametric EquivalentRFQ

GMC-4-R

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 0237004.M is determined by strict equivalence across the following parameters:

• Current Rating: 4 A
• Voltage Rating (AC): 125 V
• Fuse Type: Cartridge, Glass
• Package / Case: 5mm x 20mm
• Response Time: Medium Blow
• Breaking Capacity @ Rated Voltage: 10 kA
• Mounting Type: Requires Holder

All substitute parts listed maintain these core electrical and mechanical specifications. Substitutes are grouped into two categories: Littelfuse Series 233 variants (manufacturer-recommended and parametric equivalents) and Eaton GMC Series alternatives (parametric equivalents). All substitute parts are active products with current availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 0233004.MXP

The Littelfuse 0233004.MXP is the manufacturer-recommended substitute. It maintains all electrical and mechanical specifications of the 0237004.M while offering active product status, ROHS3 compliance, and expanded approval certifications (CE, CSA, KC, PSE, UL). This part is the direct functional replacement with the highest inventory availability (5100 units).

Alternative Littelfuse Options

The 0232004.MX125P, 0233004.MXBP, 0233004.MXF11P, and 0233004.MXF21P are parametric equivalents within the Littelfuse product line. All maintain identical electrical specifications and form factor. Selection among these variants depends on specific packaging requirements and approval certifications needed for the application. All are active products with ROHS3 compliance.

Cross-Manufacturer Alternative: Eaton GMC Series

The Eaton BK/GMC-4-R, BK1/GMC-4-R, and GMC-4-R fuses are parametric equivalents from an alternative manufacturer. These parts maintain the same current rating, voltage rating, response time, and form factor. Eaton variants carry CSA, KC, MITI, and UL certifications. Selection of Eaton alternatives is appropriate when supply chain diversification or specific approval requirements dictate cross-manufacturer substitution.

Frequently Asked Questions (FAQ)

Q: Can the 0237004.M be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts maintain the same current rating (4 A), voltage rating (125 V AC), response time (medium blow), and physical form factor (5mm x 20mm). Direct mechanical and electrical substitution is supported without circuit modification.

Q: What is the difference between the Littelfuse Series 233 variants (0233004.MXP, 0233004.MXBP, 0233004.MXF11P, 0233004.MXF21P)?

A: All Series 233 variants share identical electrical specifications and form factor. Differences exist in packaging configuration and specific approval certifications. The suffix designations (MXP, MXBP, MXF11P, MXF21P) indicate packaging and certification variations. Selection should be based on application-specific packaging requirements and required regulatory approvals.

Q: Why is the 0237004.M obsolete while its substitutes are active?

A: The 0237004.M belongs to the legacy Series 237 product line. Littelfuse has transitioned to the Series 233 and Series 232 product lines, which offer improved compliance (ROHS3), expanded certifications, and better long-term availability. The substitute parts provide equivalent functionality with modern product support.

Q: Can I use an Eaton GMC fuse instead of a Littelfuse fuse?

A: Yes. The Eaton BK/GMC-4-R, BK1/GMC-4-R, and GMC-4-R fuses are parametric equivalents with identical electrical and mechanical specifications. Cross-manufacturer substitution is supported. Verify that the application's approval requirements accept Eaton certification marks (CSA, KC, MITI, UL).

Q: What certifications apply to the substitute parts?

A: Littelfuse Series 233 variants carry CE, CSA, KC, PSE, and UL certifications. Littelfuse Series 232 variants carry CE, KC, and PSE certifications. Eaton GMC variants carry CSA, KC, MITI, and UL certifications. Confirm that the required certifications for your application are present on the selected substitute part.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed are ROHS3 compliant. The original 0237004.M is RoHS non-compliant. Substitution to any listed part improves environmental compliance status.

Q: What is the difference between the Eaton GMC variants (BK/GMC-4-R, BK1/GMC-4-R, GMC-4-R)?

A: All three Eaton variants maintain identical electrical specifications and form factor. The prefix designations (BK, BK1, or no prefix) indicate packaging and certification variations. Selection should be based on specific packaging requirements and regulatory approval needs for the application.