Equivalent & Substitute Parts for 5VT 4-R Glass Cartridge Fuse

Part Overview

The Bel Fuse Inc. 5VT 4-R is a 4 A, 250 V AC/DC glass cartridge fuse in 5mm x 20mm form factor with slow-blow response characteristics. This part is classified as obsolete. Equivalent and substitute parts are available from active product lines, including parametric equivalents from Bel Fuse Inc. and direct substitutes from Littelfuse Inc. and Eaton Electronics Division. Finding alternatives ensures design continuity and supply chain reliability for applications requiring 4 A fusing at 250 V AC/DC.

Key Parameters

Parameter	Value
Current Rating	4 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Slow Blow
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (4 A), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (slow blow), and mounting requirement (requires holder). All substitute parts listed meet these core criteria.

Substitute parts are grouped into three categories:

Parametric Equivalents (Bel Fuse Inc.): Parts 5ET 4-R and 5ST 4-R maintain identical electrical and mechanical specifications to the 5VT 4-R. These parts differ in series designation and breaking capacity ratings but preserve all functional parameters required for direct substitution.

Direct Manufacturer Substitutes (Littelfuse Inc.): Parts 0213004.MXP, 0213004.TXP, 0218004.HXP, 0218004.MXBP, 0218004.MXP, and 0218004.TXP are from an alternative manufacturer but meet all core electrical and mechanical requirements. Minor dimensional variations (5.20mm diameter vs. 5.10mm) fall within acceptable tolerance for holder compatibility.

Similar Substitutes (Eaton Electronics Division): Part GDC-4A meets all functional requirements with equivalent electrical performance and holder compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response Time	Package	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ω)	Product Status
5VT 4-R	Bel Fuse Inc.	5VT	4	250	Slow Blow	5mm x 20mm	40 A	300	0.016	Obsolete
5ET 4-R	Bel Fuse Inc.	5ET	4	250	Slow Blow	5mm x 20mm	150 A	300	0.016	Active
5ST 4-R	Bel Fuse Inc.	5ST	4	250	Slow Blow	5mm x 20mm	40 A	56	0.014	Active
0213004.MXP	Littelfuse Inc.	213	4	250	Slow Blow	5mm x 20mm	40 A	226.505	0.017	Active
0213004.TXP	Littelfuse Inc.	213	4	250	Slow Blow	5mm x 20mm	40 A	226.505	0.017	Active
0218004.HXP	Littelfuse Inc.	218	4	250	Slow Blow	5mm x 20mm	40 A	69.1	0.0129	Active
0218004.MXBP	Littelfuse Inc.	218	4	250	Slow Blow	5mm x 20mm	40 A	69.1	0.0129	Active
0218004.MXP	Littelfuse Inc.	218	4	250	Slow Blow	5mm x 20mm	40 A	69.1	0.0129	Active
0218004.TXP	Littelfuse Inc.	218	4	250	Slow Blow	5mm x 20mm	40 A	69.1	0.0129	Active
GDC-4A	Eaton - Electronics Division	GDC	4	250	Slow Blow	5mm x 20mm	40 A	71.8	0.0139	Active

Engineering Selection Recommendations

Bel Fuse Inc. 5ET 4-R is the primary parametric equivalent. It maintains identical electrical characteristics and DC cold resistance to the 5VT 4-R while offering higher breaking capacity (150 A vs. 40 A). Active product status and full compliance certifications (CCC, CE, CSA, cURus, SEMKO, VDE) support long-term availability.

Bel Fuse Inc. 5ST 4-R provides an alternative from the same manufacturer with active status. Melting I²t is lower (56 vs. 300), resulting in faster thermal response. DC cold resistance is marginally lower (0.014 Ω vs. 0.016 Ω). This part is suitable where faster fuse operation is acceptable within circuit design parameters.

Littelfuse Inc. 0218004.MXP is the highest-inventory substitute from an alternative manufacturer, with 22,400 units in stock. It meets all core electrical and mechanical requirements. Melting I²t (69.1) and DC cold resistance (0.0129 Ω) differ from the original but remain within acceptable ranges for 4 A, 250 V slow-blow applications. Compliance certifications include CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE.

Littelfuse Inc. 0213004.MXP and 0213004.TXP are direct alternatives from the 213 series with equivalent electrical performance and active product status. Both carry comprehensive compliance certifications.

Eaton Electronics Division GDC-4A provides a third-source option with active status. Melting I²t (71.8) and DC cold resistance (0.0139 Ω) are comparable to Littelfuse alternatives. Compliance certifications include cURus, IMQ, and MITI/JET.

All substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental status of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use 5ET 4-R as a direct replacement for 5VT 4-R?

A: Yes. The 5ET 4-R is a parametric equivalent with identical current rating (4 A), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (slow blow), and operating temperature range (-55°C ~ 125°C). The higher breaking capacity (150 A vs. 40 A) does not prevent substitution and may provide additional circuit protection margin.

Q: What is the difference between Bel Fuse 5VT, 5ET, and 5ST series?

A: All three series share identical electrical and mechanical core specifications for the 4 A, 250 V rating. The 5ET series offers higher breaking capacity (150 A). The 5ST series has lower melting I²t (56 vs. 300), resulting in faster thermal response. Series designation reflects internal design differences that do not affect holder compatibility or basic fusing function.

Q: Can I substitute Littelfuse parts for Bel Fuse parts?

A: Yes. Littelfuse 0213004.MXP, 0213004.TXP, 0218004.HXP, 0218004.MXBP, 0218004.MXP, and 0218004.TXP all meet the core electrical and mechanical requirements: 4 A current rating, 250 V AC voltage rating, slow-blow response, 5mm x 20mm package, and holder-based mounting. Minor dimensional variations (5.20mm diameter vs. 5.10mm) are within acceptable tolerance for standard fuse holders.

Q: What does melting I²t indicate?

A: Melting I²t is a thermal energy parameter that characterizes fuse response speed. Lower values indicate faster thermal response. The 5VT 4-R has melting I²t of 300, while Littelfuse 218 series parts have 69.1. Both are slow-blow fuses suitable for 4 A applications; the difference reflects design variations between manufacturers.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—5ET 4-R, 5ST 4-R, Littelfuse 0213004 and 0218004 series, and Eaton GDC-4A—are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original 5VT 4-R.

Q: Which substitute has the best inventory availability?

A: Littelfuse 0218004.MXP has the highest inventory with 22,400 units in stock. Bel Fuse 5ST 4-R has 31,090 units available. Both support immediate procurement for production requirements.

Q: Can I use GDC-4A from Eaton as a substitute?

A: Yes. The Eaton GDC-4A meets all functional requirements: 4 A current rating, 250 V AC voltage rating, slow-blow response, 5mm x 20mm package, and holder-based mounting. It is an active product with compliance certifications from cURus, IMQ, and MITI/JET.

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