5VT 3.15-R Equivalent & Substitute Parts

Part Overview

The 5VT 3.15-R is a 3.15 A, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm package format. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring this electrical specification.

Key Parameters

Parameter	Value
Current Rating	3.15 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

Substitute parts for the 5VT 3.15-R are qualified based on the following electrical and mechanical parameters:

Current Rating: 3.15 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

All substitute parts listed maintain these core specifications. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies are permitted within the scope of equivalent substitution, provided the primary electrical and mechanical characteristics remain unchanged.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Package	Response Time	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	Product Status
5VT 3.15-R	Bel Fuse Inc.	3.15	250	5mm x 20mm	Slow Blow	35	203	0.022	Obsolete
02133.15MXP	Littelfuse Inc.	3.15	250	5mm x 20mm	Slow Blow	35	202	0.0231	Active
02133.15HXP	Littelfuse Inc.	3.15	250	5mm x 20mm	Slow Blow	35	202	0.0231	Active
02183.15HXP	Littelfuse Inc.	3.15	250	5mm x 20mm	Slow Blow	35	38.15	0.0173	Active
02183.15TXP	Littelfuse Inc.	3.15	250	5mm x 20mm	Slow Blow	35	38.15	0.0173	Active
02193.15MXAP	Littelfuse Inc.	3.15	250	5mm x 20mm	Slow Blow	150	202	0.0231	Active
GDC-3.15A	Eaton - Electronics Division	3.15	250	5mm x 20mm	Slow Blow	35	96.4	0.0185	Active

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, eliminating obsolescence risk associated with the 5VT 3.15-R. Selection among substitutes should be based on:

Littelfuse 02133.15MXP and 02133.15HXP are functionally equivalent with melting I²t values (202) closely matching the original specification (203) and maintain identical breaking capacity (35 A). Both are active products with comprehensive approval agency certifications including CCC, CE, CSA, PSE, SEMKO, UR, and VDE.

Littelfuse 02183.15HXP and 02183.15TXP offer lower DC cold resistance (0.0173 Ohms) and reduced melting I²t (38.15), with approval agencies including CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE. These variants are suitable where thermal characteristics differ from the original design.

Littelfuse 02193.15MXAP provides enhanced breaking capacity (150 A) compared to the original (35 A), with identical melting I²t (202) and DC cold resistance (0.0231 Ohms). This variant is appropriate for applications requiring higher fault current protection.

Eaton GDC-3.15A is an alternative manufacturer option with intermediate melting I²t (96.4) and DC cold resistance (0.0185 Ohms). Approval agencies include cURus, IMQ, and MITI/JET.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 5VT 3.15-R?

A: All listed parts share identical current rating (3.15 A), voltage rating (250 V AC), package format (5mm x 20mm), fuse type (cartridge, glass), and response time (slow blow). Physical and electrical compatibility is confirmed. Differences in breaking capacity and melting I²t may affect performance in specific circuit conditions; consult circuit design requirements.

Q: What is the difference between the Littelfuse 213 series and 218 series substitutes?

A: The 213 series (02133.15MXP, 02133.15HXP) maintains melting I²t of 202, closely matching the original 203. The 218 series (02183.15HXP, 02183.15TXP) has reduced melting I²t of 38.15 and lower DC cold resistance of 0.0173 Ohms, resulting in faster thermal response characteristics.

Q: Does the 02193.15MXAP with 150 A breaking capacity affect circuit operation?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt. The 02193.15MXAP's 150 A breaking capacity exceeds the original 35 A specification, providing enhanced protection capability. This does not affect normal circuit operation at rated current (3.15 A).

Q: Are all substitutes RoHS3 compliant?

A: All listed Littelfuse and Eaton substitutes are RoHS3 compliant, matching the original 5VT 3.15-R specification.

Q: What approval agencies are common across all substitutes?

A: CCC, CE, CSA, SEMKO, and VDE certifications are present across all substitute options, ensuring broad regulatory acceptance.

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