Littelfuse 0225.500H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0225.500H is a 500 mA, 250 V AC fast-blow glass cartridge fuse in 2AG package format (5mm × 15mm). This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain circuit protection functionality in applications where the original part is no longer available through standard distribution channels. All substitute parts maintain identical electrical ratings and mechanical compatibility with the original specification.

Key Parameters

Parameter	Value
Current Rating	500 mA
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Package / Case	2AG, 5mm × 15mm
Response Time	Fast Blow
Breaking Capacity @ Rated Voltage	35A
Melting I²t	0.365
Operating Temperature Range	-55°C to 125°C
DC Cold Resistance	0.265 Ohms
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution for the 0225.500H is based on strict equivalence of the following electrical and mechanical parameters:

Current Rating: 500 mA (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 2AG, 5mm × 15mm (exact match required)
Response Time: Fast Blow (exact match required)
Melting I²t: 0.365 (exact match required)
DC Cold Resistance: 0.265 Ohms (exact match required)

All substitute parts listed below meet these criteria. The primary distinction between the original part and substitutes is product status (obsolete versus active) and enhanced compliance certifications in the substitute parts.

Parameter Comparison

Parameter	0225.500H (Original)	0225.500HXP	0225.500MXP	0225.500VXP
Current Rating (Amps)	500 mA	500 mA	500 mA	500 mA
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 × 15mm	2AG, 5mm × 15mm	2AG, 5mm × 15mm	2AG, 5mm × 15mm
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Breaking Capacity @ Rated Voltage	35A	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC
Melting I²t	0.365	0.365	0.365	0.365
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
DC Cold Resistance	0.265 Ohms	0.265 Ohms	0.265 Ohms	0.265 Ohms
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CSA, UL	CE, CSA, UL	CE, CSA, UL	CE, CSA, UL

Engineering Selection Recommendations

All three substitute parts (0225.500HXP, 0225.500MXP, 0225.500VXP) are electrically and mechanically equivalent to the original 0225.500H and are suitable for direct replacement in applications requiring a 500 mA, 250 V AC fast-blow glass cartridge fuse in 2AG package format.

The substitute parts offer the following advantages over the original obsolete part:

Active product status with ongoing manufacturing and distribution availability
ROHS3 compliance (original part is RoHS non-compliant)
Extended approval certifications including CE marking (original part carries only CSA and UL)
Specified DC voltage rating of 125 V (original part does not specify DC rating)
Enhanced breaking capacity specification for DC applications (10kA DC versus unspecified for original)

Selection among the three substitute parts may be based on packaging preference (all listed as Bulk) and inventory availability. No technical differentiation exists between 0225.500HXP, 0225.500MXP, and 0225.500VXP for circuit protection performance.

Frequently Asked Questions (FAQ)

Q: Can the 0225.500HXP, 0225.500MXP, or 0225.500VXP be used as direct replacements for the 0225.500H?

A: Yes. All three substitute parts are electrically and mechanically equivalent. They maintain identical current rating (500 mA), AC voltage rating (250 V), fuse type (cartridge, glass), package format (2AG, 5mm × 15mm), response time (fast blow), and melting I²t (0.365). They are suitable for direct installation in any circuit designed for the 0225.500H.

Q: What is the difference between the original 0225.500H and the substitute parts?

A: The primary differences are product status and compliance certifications. The 0225.500H is obsolete and RoHS non-compliant. The substitute parts are active products with ROHS3 compliance and CE certification in addition to CSA and UL approvals. The substitute parts also specify a 125 V DC rating and 10kA DC breaking capacity, whereas the original part does not specify DC parameters.

Q: Are all three substitute parts (0225.500HXP, 0225.500MXP, 0225.500VXP) identical in performance?

A: Yes. All three parts are parametrically equivalent with no technical differentiation in circuit protection performance, electrical characteristics, or mechanical compatibility. Selection may be based on packaging availability and inventory status.

Q: What is the 2AG package format?

A: The 2AG package format specifies a glass cartridge fuse with dimensions of 5mm diameter × 15mm length (0.177" diameter × 0.570" length). This fuse requires installation in a compatible fuse holder and is not a surface-mount or direct-solder component.

Q: Can this fuse be used in both AC and DC circuits?

A: The original 0225.500H specifies only 250 V AC rating. The substitute parts specify 250 V AC and 125 V DC ratings. For DC applications, the substitute parts are the appropriate selection.

Q: What does "fast blow" response time mean?

A: Fast blow indicates the fuse will open quickly when current exceeds the rated 500 mA threshold. This characteristic is suitable for circuits requiring rapid protection against overcurrent conditions and is maintained across all equivalent and substitute parts.

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