Littelfuse 0388005.MXP Glass Cartridge Fuse 5A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0388005.MXP is a 5 A, 250 V AC/DC glass cartridge fuse with fast-blow response characteristics, designed for 3AB and 3AG holder applications. This component operates across a temperature range of -55°C to 125°C and meets multiple international approval standards including CE, K-MARK, and PSE certifications.

The 0388005.MXP carries an Obsolete product status. Equivalent and substitute parts are necessary to maintain circuit protection functionality in applications where the original component is no longer available through standard distribution channels. All substitute parts listed maintain identical electrical ratings, mechanical dimensions, and mounting requirements while offering active product status and improved availability.

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" (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0388005.MXP is determined by strict equivalence across the following critical 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: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Mounting Type: Requires Holder (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

All substitute parts listed below meet these criteria. Variations in secondary parameters such as Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agency certifications do not affect functional substitutability within the specified electrical and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage Rating (AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	Approval Agencies
0388005.MXP	Littelfuse Inc.	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	100 A	66.1	0.0184	Obsolete	CE, K-MARK, PSE
0312005.MXP	Littelfuse Inc.	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	50	0.0224	Active	CE, CSA, KC, PSE, UL
0312005.HXP	Littelfuse Inc.	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	50	0.0224	Active	CE, CSA, KC, PSE, UL
0312005.MXCCP	Littelfuse	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	100 A	50	0.0224	Active	CE, CSA, KC, METI, UL
0312005.TXP	Littelfuse Inc.	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	50	0.0224	Active	CE, CSA, KC, PSE, UL
0312005.VXP	Littelfuse Inc.	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	50	0.0224	Active	CE, CSA, KC, PSE, UL
AGC-5-R	Eaton - Electronics Division	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	131.5	0.019	Active	CSA, UL
BK-AGC-B-5-R	Eaton - Electronics Division	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	131.5	0.019	Active	CSA, UL
BK/AGC-5-R	Eaton - Electronics Division	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	131.5	0.019	Active	CSA, UL
BK/AGC-5BX	Eaton - Electronics Division	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	131.5	0.019	Active	CSA, UL
BK/AGC-5PP-R	Eaton - Electronics Division	5 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	131.5	0.019	Active	CSA, UL

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 0388005.MXP and are suitable for direct replacement in 3AB and 3AG holder applications. The primary distinction between substitute options is product status and approval agency certifications.

Littelfuse 0312005 series parts (0312005.MXP, 0312005.HXP, 0312005.TXP, 0312005.VXP) maintain active product status and carry expanded approval certifications including CSA, KC, and UL in addition to CE and PSE. The 0312005.MXCCP variant includes METI certification and is suitable for applications requiring Japanese market compliance.

Eaton AGC series parts (AGC-5-R, BK-AGC-B-5-R, BK/AGC-5-R, BK/AGC-5BX, BK/AGC-5PP-R) are active products with CSA and UL certifications. These components are suitable for North American and international applications where Eaton component qualification is specified.

Selection between Littelfuse and Eaton alternatives should be based on existing component qualification requirements, supply chain preferences, and regional certification mandates for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 0388005.MXP be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical current rating (5 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), package dimensions (3AB, 3AG, 1/4" x 1-1/4"), and operating temperature range (-55°C to 125°C). Direct mechanical and electrical substitution is supported.

Q: What is the difference between Littelfuse 0312005 series and Eaton AGC series substitutes?

A: Both series meet the electrical and mechanical requirements for substitution. Littelfuse 0312005 parts carry CE, CSA, KC, PSE, and UL certifications. Eaton AGC parts carry CSA and UL certifications. Selection depends on application-specific certification requirements and component qualification documentation.

Q: Are there differences in Breaking Capacity between the main part and substitutes?

A: Yes. The 0388005.MXP has a Breaking Capacity of 100 A at rated voltage. Most substitute parts (0312005.MXP, 0312005.HXP, 0312005.TXP, 0312005.VXP, and all Eaton AGC variants) have a Breaking Capacity of 200 A. The 0312005.MXCCP has a Breaking Capacity of 100 A. Higher Breaking Capacity does not affect substitutability and provides enhanced performance margin in fault conditions.

Q: Does the DC Cold Resistance variation affect substitutability?

A: No. The DC Cold Resistance values provided (ranging from 0.0184 to 0.0224 Ohms) are within acceptable tolerance for fast-blow glass cartridge fuses in this current and voltage class. These variations do not affect circuit protection function or compatibility with standard 3AB and 3AG holders.

Q: Which substitute part offers the best availability?

A: The 0312005.MXP carries the highest inventory level (8,631 pieces) among all listed substitutes and maintains active product status with comprehensive international certifications.

Q: Can I use Eaton AGC parts in applications originally specified for Littelfuse components?

A: Yes, provided the application does not contain specific component qualification restrictions. Eaton AGC-5-R, BK-AGC-B-5-R, BK/AGC-5-R, BK/AGC-5BX, and BK/AGC-5PP-R are electrically and mechanically equivalent. Verify that CSA and UL certifications satisfy application requirements.

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