Littelfuse 0313.010H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0313.010H is a 10 mA, 250 V AC/DC glass cartridge fuse with slow-blow response characteristics, designed for 3AB and 3AG holder applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The 0313.010H maintains the same electrical and mechanical specifications across its active substitute variants, ensuring functional compatibility in replacement scenarios.

Key Parameters

Parameter	Value
Current Rating	10 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Melting I²t	0.000121

Substitute Part Grouping Explanation

Substitution eligibility for the 0313.010H is determined by strict equivalence across the following parameters: current rating (10 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), package designation (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). All substitute parts listed maintain these core electrical and mechanical specifications, ensuring direct functional replacement without circuit modification.

The substitute parts are grouped into two categories:

Littelfuse Active Equivalents: 0313.010HXP, 0313.010MXP, and 0313.010VXP are direct Littelfuse manufacturer equivalents with active product status and enhanced compliance certifications (ROHS3, CE, CSA, UL).

Eaton Cross-Manufacturer Equivalents: BK/MDL-1/100, BK/MDQ-1/100, MDL-1/100, and MDQ-1/100 are Eaton-manufactured alternatives meeting the same electrical and mechanical requirements, with CSA and UL certifications where applicable.

Parameter Comparison

Parameter	0313.010H (Main)	0313.010HXP	0313.010MXP	0313.010VXP	BK/MDL-1/100	BK/MDQ-1/100	MDL-1/100	MDQ-1/100
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Eaton	Eaton	Eaton	Eaton
Current Rating (Amps)	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Melting I²t	0.000121	0.000121	0.000121	0.000121	—	—	—	—
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	—	—
Approval Agency	CSA, UL	CE, CSA, UL	CE, CSA, UL	CE, CSA, UL	—	—	CSA, UL	CSA, UL

Engineering Selection Recommendations

For applications requiring active product status and current compliance certifications, the Littelfuse 0313.010HXP, 0313.010MXP, and 0313.010VXP are preferred substitutes. These parts maintain full electrical and mechanical compatibility with the obsolete 0313.010H while offering ROHS3 compliance and extended approval agency certifications (CE, CSA, UL).

For applications where RoHS compliance is not a requirement, the Eaton MDL-1/100 and MDQ-1/100 series provide functional equivalence with CSA and UL certifications. The Eaton BK/MDL-1/100 and BK/MDQ-1/100 variants are also electrically equivalent but lack published approval agency certifications.

All substitute parts share identical current ratings, voltage ratings, fuse response characteristics, and physical dimensions, ensuring direct replacement without circuit redesign or holder modification.

Frequently Asked Questions (FAQ)

Q: Can the 0313.010H be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical electrical specifications (10 mA, 250 V AC, slow-blow response) and physical dimensions (0.250" Dia x 1.250" L), ensuring direct compatibility with existing 3AB and 3AG fuse holders without modification.

Q: What is the difference between Littelfuse and Eaton substitute options?

A: Littelfuse substitutes (0313.010HXP, 0313.010MXP, 0313.010VXP) are active products with ROHS3 compliance and CE certification in addition to CSA and UL approvals. Eaton substitutes (MDL-1/100, MDQ-1/100, BK/MDL-1/100, BK/MDQ-1/100) provide functional equivalence with varying compliance certifications. All maintain identical electrical and mechanical parameters.

Q: Are there differences in melting I²t values between substitutes?

A: The Littelfuse substitutes (0313.010HXP, 0313.010MXP, 0313.010VXP) maintain the same melting I²t value of 0.000121 as the original 0313.010H. Eaton substitutes do not publish this parameter but are electrically equivalent based on current rating and response time classification.

Q: Which substitute is recommended for new designs?

A: For new designs, the Littelfuse 0313.010HXP is recommended due to active product status, ROHS3 compliance, and comprehensive approval agency certifications (CE, CSA, UL). This ensures long-term availability and regulatory compliance.

Q: Do all substitutes require the same holder type?

A: Yes. All substitute parts are designed for 3AB and 3AG fuse holders and maintain the same 0.250" Dia x 1.250" L physical dimensions as the original 0313.010H. No holder modification is required.

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