Littelfuse 022504.6H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 022504.6H is a 4.6 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 and mechanical specifications while offering improved compliance status and extended product lifecycle support.

Key Parameters

Parameter	Specification
Current Rating	4.6 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 ~ 125°C
Melting I²t	6.7
Breaking Capacity @ Rated Voltage	100 A

Substitute Part Grouping Explanation

Substitute parts for the 022504.6H are qualified based on the following mandatory parameters:

Current Rating: 4.6 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Package / Case: 2AG, 5mm x 15mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Melting I²t: 6.7 (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these criteria. The primary distinction between the main part and substitutes is product status and regulatory compliance. The 022504.6H is obsolete; all substitute parts are active products with current manufacturing support.

Parameter Comparison

Parameter	022504.6H	022504.6HXP	022504.6MXP	022504.6VXP
Manufacturer	Littelfuse Inc.	Littelfuse	Littelfuse	Littelfuse Inc.
Current Rating (Amps)	4.6 A	4.6 A	4.6 A	4.6 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
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Melting I²t	6.7	6.7	6.7	6.7
Breaking Capacity @ Rated Voltage	100 A	100 A AC, 10 kA DC	100 A AC, 10 kA DC	100 A AC, 10 kA DC
DC Cold Resistance	0.0258 Ohms	0.0265 Ohms	0.0265 Ohms	0.0265 Ohms
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
Packaging	-	Bulk	Bulk	Bulk

Engineering Selection Recommendations

All three substitute parts (022504.6HXP, 022504.6MXP, 022504.6VXP) are functionally equivalent to the 022504.6H and are suitable for direct replacement in applications requiring a 4.6 A 250 V AC fast-blow glass cartridge fuse in 2AG package format.

The substitute parts offer the following advantages over the obsolete 022504.6H:

Active product status with ongoing manufacturing support
ROHS3 compliance versus non-compliant status of the main part
Extended regulatory certifications including CE and PSE in addition to CSA and UL
DC voltage rating specification (125 V DC) providing additional application flexibility
Enhanced breaking capacity specification for DC applications (10 kA DC)

Selection among the three substitute parts may be based on inventory availability and procurement lead times, as all three parts are electrically and mechanically identical.

Frequently Asked Questions (FAQ)

Q: Can 022504.6HXP, 022504.6MXP, or 022504.6VXP be used as direct replacements for 022504.6H?

A: Yes. All three substitute parts meet the mandatory electrical and mechanical parameters: 4.6 A current rating, 250 V AC voltage rating, 2AG package format, fast-blow response time, and 6.7 melting I²t value. Physical dimensions and mounting requirements are identical.

Q: What is the difference between the three substitute parts?

A: 022504.6HXP, 022504.6MXP, and 022504.6VXP are parametrically equivalent. All three are active products with identical electrical specifications, package format, and regulatory certifications. Differences are limited to manufacturer packaging designations and inventory availability.

Q: Why is the 022504.6H classified as obsolete?

A: The 022504.6H is no longer in active production. The substitute parts listed provide equivalent functionality with current manufacturing support and improved regulatory compliance status.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist for applications designed for the 022504.6H. The substitute parts maintain identical package format (2AG, 5mm x 15mm), mounting type (requires holder), and electrical characteristics. The fuse holder used with the 022504.6H is compatible with all substitute parts.

Q: What is the significance of the DC voltage rating on the substitute parts?

A: The substitute parts specify a 125 V DC rating, whereas the 022504.6H does not specify a DC rating. This specification on the substitute parts indicates their suitability for DC applications up to 125 V. For AC-only applications, this parameter does not affect compatibility.

Q: Do the substitute parts have different approval certifications?

A: The substitute parts include CE and PSE certifications in addition to the CSA and UL certifications present on the 022504.6H. These additional certifications expand the geographic and regulatory scope of approved applications without affecting compatibility in existing designs.

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