Bel Fuse Inc. 5VT 4 Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Bel Fuse Inc. 5VT 4 is a 4 A, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor, designed for circuit protection applications requiring a holder. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The 5VT series has been superseded by active production alternatives that maintain electrical and mechanical compatibility while offering improved availability and compliance status.

Substiute Parts

5VT 4

Bel Fuse Inc.In Stock: 6845VT 4 Datasheet

Current PartRFQ

5ET 4-R

Bel Fuse Inc.In Stock: 41085ET 4-R Datasheet

Parametric EquivalentRFQ

5ST 4-R

Bel Fuse Inc.In Stock: 311325ST 4-R Datasheet

Parametric EquivalentRFQ

0213004.MXP

Littelfuse Inc.In Stock: 56030213004.MXP Datasheet

SimilarRFQ

0213004.TXP

Littelfuse Inc.In Stock: 8620213004.TXP Datasheet

SimilarRFQ

0218004.HXP

Littelfuse Inc.In Stock: 53680218004.HXP Datasheet

SimilarRFQ

0218004.MXBP

Littelfuse Inc.In Stock: 7540218004.MXBP Datasheet

SimilarRFQ

0218004.MXP

Littelfuse Inc.In Stock: 224390218004.MXP Datasheet

SimilarRFQ

0218004.TXP

Littelfuse Inc.In Stock: 10890218004.TXP Datasheet

SimilarRFQ

GDC-4A

Eaton - Electronics DivisionIn Stock: 1129GDC-4A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies do not disqualify substitution but may affect suitability for specific applications.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain the core electrical and mechanical specifications required for direct replacement of the 5VT 4. Selection should prioritize active production status and compliance requirements:

Bel Fuse Inc. alternatives (5ET 4-R, 5ST 4-R): Recommended for applications requiring continuity within the Bel Fuse product ecosystem. Both are active production parts with ROHS3 compliance. The 5ET 4-R offers enhanced breaking capacity (150 A) compared to the original 5VT 4 (40 A). The 5ST 4-R maintains the original breaking capacity specification.

Littelfuse Inc. alternatives (0213004.MXP, 0213004.TXP, 0218004.HXP, 0218004.MXBP, 0218004.MXP, 0218004.TXP): All are active production parts with ROHS3 compliance and broader international approval certifications. These parts are suitable for applications requiring multi-regional compliance. Littelfuse 218 series (0218004.HXP, 0218004.MXBP, 0218004.MXP, 0218004.TXP) offer lower melting I²t values (69.1) compared to the original specification (300), which may affect response characteristics in specific circuit protection scenarios.

Eaton Electronics Division alternative (GDC-4A): Active production part with cURus, IMQ, and MITI/JET certifications. Suitable for applications requiring Japanese market compliance (MITI/JET).

For new designs, prioritize parts with the broadest approval agency coverage and active production status. For legacy system maintenance, Bel Fuse alternatives provide the most direct compatibility path.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 5VT 4?

A: Yes, all listed parts are electrically and mechanically equivalent based on the core parameters: 4 A current rating, 250 V AC voltage rating, slow-blow response, and 5mm x 20mm package. They will physically fit the same holder and provide equivalent circuit protection at the specified current and voltage levels.

Q: What is the difference between the Bel Fuse 5ET 4-R and 5ST 4-R?

A: Both are 4 A, 250 V slow-blow fuses in 5mm x 20mm packages. The primary difference is breaking capacity: the 5ET 4-R has 150 A breaking capacity versus 40 A for the 5ST 4-R. The 5ST 4-R also has a lower melting I²t value (56 versus 300), which affects the thermal response profile. Select based on your circuit's fault current requirements.

Q: Why do Littelfuse 218 series fuses have lower melting I²t values?

A: Melting I²t is a thermal characteristic that affects how quickly the fuse element responds to overcurrent. Lower values indicate faster thermal response. The Littelfuse 218 series (69.1) responds faster than the original 5VT 4 (300). This difference may be significant in applications with sensitive load protection requirements.

Q: Are all substitute parts RoHS compliant?

A: The original 5VT 4 is RoHS non-compliant. All active production substitutes listed (5ET 4-R, 5ST 4-R, and all Littelfuse and Eaton parts) are ROHS3 compliant, making them suitable for applications requiring RoHS compliance.

Q: Which substitute part has the broadest international approval coverage?

A: Littelfuse 213 and 218 series parts carry the most extensive approval agency certifications, including BSI, CCC, CE, CSA, PSE, SEMKO, UR, and VDE. These are suitable for applications requiring multi-regional market compliance.

Q: Can I use the GDC-4A from Eaton in place of the 5VT 4?

A: Yes, the GDC-4A is electrically and mechanically equivalent. It is suitable for applications requiring Japanese market compliance (MITI/JET certification). Note that it does not list an operating temperature range in the provided specifications.