Littelfuse 022501.5H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 022501.5H is a 1.5 A, 250 V AC fast-blow glass cartridge fuse in 2AG package format (5mm x 15mm). This component is classified as obsolete, requiring identification of active equivalent alternatives for continued system support and procurement. Substitute parts maintain identical electrical ratings and mechanical form factors while offering improved compliance status and expanded voltage specifications.

Key Parameters

Parameter	Specification
Current Rating	1.5 A
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm
Response Time	Fast Blow
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
Melting I²t	0.8

Substitute Part Grouping Explanation

Substitution of the obsolete 022501.5H is based on strict equivalence of the following critical parameters:

Current Rating: 1.5 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 2AG, 5mm x 15mm (exact match required)
Response Time: Fast Blow (exact match required)
Melting I²t: 0.8 (exact match required)

All substitute parts listed below meet these criteria. The primary distinction between the main part and substitutes is product status (obsolete vs. active) and expanded DC voltage rating capability in substitute models.

Parameter Comparison

Parameter	022501.5H	022501.5HXP	022501.5MXP	022501.5VXP
Current Rating (Amps)	1.5 A	1.5 A	1.5 A	1.5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	125 V	125 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Breaking Capacity @ Rated Voltage	100 A	35 A AC, 10 kA DC	35 A AC, 10 kA DC	35 A AC, 10 kA DC
DC Cold Resistance (Ohms)	0.0705	0.0712	0.0712	0.0712
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Melting I²t	0.8	0.8	0.8	0.8
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CSA, METI, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL

Engineering Selection Recommendations

All three substitute parts (022501.5HXP, 022501.5MXP, 022501.5VXP) are direct functional equivalents for the obsolete 022501.5H in AC applications. Selection among these active alternatives should be based on the following criteria:

Product Availability and Compliance: All substitute parts are active products with ROHS3 compliance, addressing the non-compliant status of the original part. Substitute parts carry expanded regulatory approvals (CE, CSA, PSE, UL) compared to the original (CSA, METI, UL).

DC Voltage Capability: Substitute parts provide 125 V DC rating, extending application scope beyond the AC-only specification of the original part. This enhancement does not compromise AC performance.

Inventory Status: All substitute parts maintain adequate stock levels (1167–1536 units), ensuring procurement reliability.

Mechanical and Electrical Equivalence: All substitute parts maintain identical package dimensions, current rating, AC voltage rating, response time, and melting I²t characteristics, ensuring direct mechanical and electrical interchangeability in existing holder assemblies.

Frequently Asked Questions (FAQ)

Q: Can 022501.5HXP, 022501.5MXP, and 022501.5VXP be used interchangeably with 022501.5H?

A: Yes. All three substitute parts meet the critical electrical and mechanical parameters of the original part: 1.5 A current rating, 250 V AC voltage rating, fast-blow response, 2AG package format, and 0.8 melting I²t. They are mechanically and electrically interchangeable in applications requiring AC operation.

Q: What is the difference between the substitute parts?

A: The three substitute parts (022501.5HXP, 022501.5MXP, 022501.5VXP) are parametrically equivalent. All share identical AC voltage rating, current rating, package format, and response characteristics. The primary distinction is product status (all active) and expanded DC voltage rating (125 V DC) not present in the original specification.

Q: Why does the original 022501.5H show obsolete status?

A: The 022501.5H is classified as obsolete due to its RoHS non-compliant status and limited regulatory approvals. Active substitute parts address these compliance gaps while maintaining full electrical and mechanical equivalence.

Q: Are the substitute parts suitable for DC applications?

A: Substitute parts carry 125 V DC rating, enabling use in DC circuits within this voltage limit. The original 022501.5H does not specify DC voltage capability. Verify application requirements before selecting for DC use.

Q: Do the substitute parts require the same holder assembly?

A: Yes. All substitute parts maintain the 2AG package format (5mm x 15mm) and require the same holder assembly as the original part. No mechanical modifications are necessary.

Q: What certifications do the substitute parts carry?

A: Substitute parts carry CE, CSA, PSE, and UL approvals, providing broader regulatory coverage than the original part (CSA, METI, UL). All substitute parts are ROHS3 compliant.

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