Littelfuse 0313005.H Glass Cartridge Fuse 5A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0313005.H is a 5 A, 250 V AC/DC glass cartridge fuse in the 313 series with 3AB/3AG package format (1/4" x 1-1/4"). This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The fuse provides slow-blow response characteristics suitable for circuits requiring transient current tolerance before fault isolation.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (6.35mm x 31.75mm)
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	200 A
Melting I²t	140

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters:

Current Rating: 5 A (mandatory)
Voltage Rating (AC): 250 V (mandatory)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (mandatory)
Fuse Type: Cartridge, Glass (mandatory)
Response Time: Slow Blow (mandatory)
Mounting Type: Requires Holder (mandatory)

Substitute parts are grouped into two categories:

Direct Littelfuse Manufacturer Equivalents: Parts 0313005.HXP, 0313005.HXIDP, 0313005.MXP, 0313005.VXIDP, and 0313005.VXP maintain identical electrical and mechanical specifications with active product status and enhanced compliance certifications.

Cross-Manufacturer Parametric Equivalents: Parts 0001.2531 (SCHURTER), BK/MDL-5-R, MDL-5-R, BK/MDQ-5, and MDQ-5 (Eaton) meet all mandatory electrical and mechanical parameters while originating from alternative manufacturers.

Parameter Comparison

Part Number	Manufacturer	Current (A)	Voltage AC (V)	Response Time	Package	Breaking Capacity	Melting I²t	Product Status	RoHS Status
0313005.H	Littelfuse Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	140	Obsolete	RoHS non-compliant
0313005.HXP	Littelfuse Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	140	Active	ROHS3 Compliant
0313005.HXIDP	Littelfuse Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	140	Active	ROHS3 Compliant
0313005.MXP	Littelfuse Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	276	Active	ROHS3 Compliant
0313005.VXIDP	Littelfuse Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	140	Active	ROHS3 Compliant
0313005.VXP	Littelfuse Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	140	Active	ROHS3 Compliant
0001.2531	SCHURTER Inc.	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	1.5 kA AC	127	Active	ROHS3 Compliant
BK/MDL-5-R	Eaton - Electronics Division	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	32	Active	ROHS3 Compliant
MDL-5-R	Eaton - Electronics Division	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	32	Active	ROHS3 Compliant
BK/MDQ-5	Eaton - Electronics Division	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	Not specified	Active	RoHS non-compliant
MDQ-5	Eaton - Electronics Division	5	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200 A	Not specified	Active	Not specified

Engineering Selection Recommendations

Primary Recommendation: For new designs and systems requiring RoHS3 compliance, select from the active Littelfuse 313 series equivalents: 0313005.HXP, 0313005.HXIDP, 0313005.VXIDP, or 0313005.VXP. These parts maintain identical electrical and mechanical specifications to the obsolete 0313005.H while offering current product status and enhanced regulatory compliance.

Secondary Recommendation: The Littelfuse 0313005.MXP is electrically equivalent with a higher melting I²t value (276 vs. 140), providing increased thermal capacity. This part is suitable for applications where additional transient tolerance is acceptable within the 5 A current rating.

Cross-Manufacturer Alternatives: SCHURTER 0001.2531 and Eaton MDL-5-R/BK/MDL-5-R series parts meet all mandatory electrical and mechanical parameters. The SCHURTER part offers higher breaking capacity (1.5 kA AC) and RoHS3 compliance. Eaton parts provide active status with lower melting I²t values (32), suitable for applications requiring faster response characteristics than the original slow-blow specification.

Compliance Consideration: The original 0313005.H is RoHS non-compliant. All Littelfuse active equivalents and the SCHURTER 0001.2531 are ROHS3 compliant. Eaton BK/MDQ-5 is RoHS non-compliant; MDL-5-R and BK/MDL-5-R are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can I use 0313005.MXP as a direct replacement for 0313005.H?

A: Yes. The 0313005.MXP meets all mandatory electrical and mechanical parameters: 5 A current rating, 250 V AC voltage rating, slow-blow response, and 3AB/3AG package format. The higher melting I²t (276 vs. 140) does not prevent substitution; it indicates increased thermal capacity within the same current rating.

Q: What is the difference between Littelfuse and Eaton fuses in this list?

A: Both manufacturers produce 5 A, 250 V AC glass cartridge fuses in 3AB/3AG packages meeting the same electrical and mechanical specifications. Differences exist in melting I²t values, breaking capacity ratings, and compliance certifications. Littelfuse parts maintain I²t values of 140 or 276; Eaton MDL series parts have I²t of 32, indicating faster response characteristics.

Q: Is the SCHURTER 0001.2531 compatible with my application?

A: The SCHURTER 0001.2531 is mechanically and electrically compatible for 250 V AC operation. It meets the 5 A current rating and 3AB/3AG package requirement. Note that SCHURTER specifies a 63 V DC voltage rating, whereas the original part does not specify DC voltage. The breaking capacity is higher (1.5 kA AC vs. 200 A), and melting I²t is lower (127 vs. 140).

Q: Why do some parts show different melting I²t values?

A: Melting I²t is a thermal characteristic that affects the fuse's response time to overcurrent conditions. Lower I²t values (Eaton MDL series at 32) indicate faster response; higher values (Littelfuse 0313005.MXP at 276) indicate slower response. All parts in this list maintain slow-blow classification and 5 A current rating, but thermal response characteristics vary within this category.

Q: Can I substitute an Eaton MDQ-5 for the original 0313005.H?

A: Yes, mechanically and electrically. The MDQ-5 meets all mandatory parameters: 5 A current rating, 250 V AC voltage rating, slow-blow response, and 3AB/3AG package format. However, the MDQ-5 is RoHS non-compliant, whereas the original part is also non-compliant. For new designs, ROHS3-compliant alternatives are preferred.

Q: Are all these parts interchangeable in the same fuse holder?

A: Yes. All parts listed share the identical 3AB/3AG package format (1/4" diameter x 1-1/4" length / 6.35mm x 31.75mm) and require the same holder type. Physical installation is interchangeable across all listed parts.

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