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

Part Overview

The Bel Fuse Inc. 5VT 5 is a 5 A, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor, designed for circuits requiring holder-mounted protection. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and response characteristics to ensure direct functional replacement without circuit redesign.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
Breaking Capacity @ Rated Voltage	50 A

Substitute Part Grouping Explanation

Substitution eligibility for the 5VT 5 is determined by strict equivalence across the following parameters:

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

Parametric equivalents maintain all core electrical and mechanical specifications. Similar substitutes meet the primary functional requirements but may exhibit variations in secondary parameters such as melting I²t, breaking capacity, or approval certifications. All listed substitutes are compatible with standard 5mm x 20mm fuse holders.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	Product Status	RoHS Status
5VT 5	Bel Fuse Inc.	5	250	Slow Blow	5mm x 20mm	50	444	0.012	Obsolete	RoHS non-compliant
5ET 5-R	Bel Fuse Inc.	5	250	Slow Blow	5mm x 20mm	150	444	0.012	Active	ROHS3 Compliant
5ST 5-R	Bel Fuse Inc.	5	250	Slow Blow	5mm x 20mm	50	95	0.011	Active	ROHS3 Compliant
0213005.MXP	Littelfuse Inc.	5	250	Slow Blow	5mm x 20mm	50	314	0.0116	Active	ROHS3 Compliant
0218005.HXP	Littelfuse Inc.	5	250	Slow Blow	5mm x 20mm	50	111	0.0104	Active	ROHS3 Compliant
0218005.MXBP	Littelfuse Inc.	5	250	Slow Blow	5mm x 20mm	50	111	0.0104	Active	ROHS3 Compliant
0218005.MXP	Littelfuse Inc.	5	250	Slow Blow	5mm x 20mm	50	111	0.0104	Active	ROHS3 Compliant
0218005.TXP	Littelfuse Inc.	5	250	Slow Blow	5mm x 20mm	50	111	0.0104	Active	ROHS3 Compliant
GDC-5A	Eaton - Electronics Division	5	250	Slow Blow	5mm x 20mm	50	142.5	0.00985	Active	Not specified

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 5VT 5, the Bel Fuse Inc. 5ET 5-R offers parametric equivalence with enhanced breaking capacity (150 A vs. 50 A) and active product status with ROHS3 compliance. The 5ST 5-R provides an alternative from the same manufacturer with matching breaking capacity and active status, though with reduced melting I²t (95 vs. 444).

Littelfuse Inc. substitutes (0218005.HXP, 0218005.MXBP, 0218005.MXP, 0218005.TXP, and 0213005.MXP) maintain functional equivalence with active product status and ROHS3 compliance. These parts exhibit variations in melting I²t and DC cold resistance within acceptable ranges for slow-blow cartridge fuse applications. The 0218005 series offers the highest inventory availability (42,700 units for 0218005.MXP).

The Eaton GDC-5A provides functional equivalence with active status. Certification coverage differs from Bel Fuse and Littelfuse alternatives, with emphasis on cURus, IMQ, and MITI/JET approvals.

For new designs or systems requiring RoHS compliance, all active substitutes listed above meet ROHS3 requirements. For legacy systems or applications with specific certification mandates, verify approval agency alignment with system requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can the 5VT 5 be directly replaced with any of the listed substitutes?

A: Yes. All listed substitutes maintain identical current rating (5 A), voltage rating (250 V AC), response time (slow blow), and mechanical form factor (5mm x 20mm). Direct physical and electrical compatibility is confirmed for all parts listed in this reference.

Q: What is the difference between parametric equivalents and similar substitutes?

A: Parametric equivalents (5ET 5-R, 5ST 5-R) are manufactured by Bel Fuse Inc., the original manufacturer, and maintain the highest degree of specification alignment. Similar substitutes from Littelfuse Inc. and Eaton meet all core functional requirements but may exhibit variations in secondary parameters such as melting I²t or breaking capacity. All are suitable for direct replacement.

Q: Does the 5VT 5 require a specific fuse holder?

A: The 5VT 5 requires a standard 5mm x 20mm fuse holder. All listed substitutes use the same form factor and are compatible with any holder designed for 5mm x 20mm cartridge fuses.

Q: Are there RoHS compliance considerations for substitution?

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

Q: How do melting I²t values affect substitution suitability?

A: Melting I²t is a secondary thermal characteristic that influences fuse response under specific fault conditions. Variations in melting I²t among listed substitutes (ranging from 95 to 444) do not affect direct replacement capability for standard 5 A, 250 V slow-blow applications. Verify melting I²t alignment with circuit-specific requirements if thermal response characteristics are critical to system design.

Q: Which substitute offers the best inventory availability?

A: The Littelfuse Inc. 0218005.MXP maintains the highest inventory level at 42,700 units in stock, followed by the Bel Fuse Inc. 5ST 5-R with 53,399 units. Both are active products suitable for immediate procurement.

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