Littelfuse 0318005.VXP Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318005.VXP is a 5 A, 250 V AC/DC glass cartridge fuse with fast-blow response characteristics, designed for through-hole mounting in 3AB/3AG package format (1/4" x 1-1/4" axial). This component is active in production and widely used in circuit protection applications requiring reliable overcurrent interruption. Substitute parts may be required due to inventory constraints, supply chain considerations, or design flexibility within equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	200 A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0318005.VXP is determined by strict equivalence across the following critical parameters:

Current Rating: 5 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
Mounting Type: Through Hole (exact match required)
Breaking Capacity @ Rated Voltage: 200 A (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed meet these criteria. Parametric equivalents (0318005.HXP, 0318005.MXP) are Littelfuse variants within the same 318 series. The manufacturer-recommended substitute (BK/AGC-V-5-R) is an Eaton Electronics Division equivalent from the AGC series that satisfies all electrical and mechanical requirements.

Parameter Comparison

Parameter	0318005.VXP (Littelfuse)	0318005.HXP (Littelfuse)	0318005.MXP (Littelfuse)	BK/AGC-V-5-R (Eaton)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Eaton - Electronics Division
Current Rating (Amps)	5 A	5 A	5 A	5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Breaking Capacity @ Rated Voltage	200 A	200 A	200 A	200 A
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.0224 Ohms	0.0224 Ohms	0.0224 Ohms	0.019 Ohms
Melting I²t	50	50	50	131.5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active
Approval Agency	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL	CSA, UL

Engineering Selection Recommendations

All listed substitute parts are active production components with ROHS3 compliance and appropriate regulatory certifications (UL, CSA). The Littelfuse variants (0318005.HXP, 0318005.MXP) maintain identical electrical specifications and certifications to the primary part (0318005.VXP), differing only in internal construction or packaging variants within the 318 series.

The Eaton BK/AGC-V-5-R provides cross-manufacturer equivalence with full electrical and mechanical compatibility. This part carries CSA and UL certifications. The Eaton variant exhibits a higher melting I²t value (131.5 versus 50) and slightly lower DC cold resistance (0.019 versus 0.0224 Ohms), with marginally different physical dimensions (0.266" Dia x 1.292" L versus 0.275" Dia x 1.288" L). These differences remain within the 3AB/3AG package specification tolerance and do not affect functional interchangeability in standard circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can 0318005.HXP and 0318005.MXP be used interchangeably with 0318005.VXP?

A: Yes. All three Littelfuse parts share identical electrical ratings (5 A, 250 V AC/DC), fuse type (cartridge, glass), response time (fast blow), package format (3AB, 3AG, 1/4" x 1-1/4" axial), and regulatory certifications. They differ only in internal construction variants within the 318 series.

Q: Is the Eaton BK/AGC-V-5-R a direct substitute for the Littelfuse 0318005.VXP?

A: The Eaton BK/AGC-V-5-R is electrically and mechanically equivalent for circuit protection applications. Both parts meet the same current (5 A), voltage (250 V AC), package (3AB, 3AG), and breaking capacity (200 A) requirements. Physical dimensions are within 3AB/3AG tolerance. The Eaton part carries UL and CSA certifications, while the Littelfuse part includes additional certifications (CE, KC, PSE). Application-specific certification requirements should be verified.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution requires exact equivalence in current rating (5 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), package format (3AB, 3AG, 1/4" x 1-1/4" axial), mounting type (through hole), breaking capacity (200 A), and operating temperature range (-55°C ~ 125°C).

Q: Are there differences in melting I²t between these parts?

A: The Littelfuse variants (0318005.VXP, 0318005.HXP, 0318005.MXP) have a melting I²t of 50, while the Eaton BK/AGC-V-5-R has a melting I²t of 131.5. Both values are valid for their respective designs and do not affect interchangeability in standard 5 A, 250 V applications.

Q: Do all substitute parts have the same regulatory certifications?

A: The Littelfuse parts carry CE, CSA, KC, PSE, and UL certifications. The Eaton part carries CSA and UL certifications. Applications requiring specific regional certifications (CE, KC, PSE) should use Littelfuse variants.

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