Littelfuse 0232005.M Glass Cartridge Fuse 5A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232005.M is a 5A 250VAC glass cartridge fuse with 5mm x 20mm dimensions, designed for applications requiring medium-blow response characteristics. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain identical electrical and mechanical specifications while offering improved compliance status and active product availability.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Breaking Capacity @ Rated Voltage	100A
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (5A), voltage rating (250VAC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium blow), breaking capacity (100A), and operating temperature range (-55°C to 125°C). All identified substitutes meet these criteria without deviation.

The substitute parts are grouped into two categories:

Littelfuse Series 232 Active Variants: 0232005.MXF20P, 0232005.MXF22P, and 0232005.MXP represent active production alternatives from the same manufacturer and series. These parts differ from the main part only in packaging configuration and compliance certifications.

Cross-Manufacturer Equivalent: MSC-5A from OptiFuse meets all electrical and mechanical parameters while offering alternative sourcing from a different manufacturer within the same product category.

Parameter Comparison

Parameter	0232005.M	0232005.MXF20P	0232005.MXF22P	0232005.MXP	MSC-5A
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	OptiFuse
Current Rating (Amps)	5 A	5 A	5 A	5 A	5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Response Time	Medium Blow	Medium Blow	Medium Blow	Medium Blow	Medium Blow
Breaking Capacity @ Rated Voltage	100A	100A	100A	100A	100A
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	METI	CE, KC, PSE	CE, KC, PSE	CE, KC, PSE	cULus, UL 248
DC Cold Resistance	0.0145 Ohms	0.0134 Ohms	0.0134 Ohms	0.0134 Ohms	Not specified
Melting I²t	58.25	56.72	56.72	56.72	51.13

Engineering Selection Recommendations

For applications currently using the obsolete 0232005.M, direct substitution with any of the active Littelfuse variants (0232005.MXF20P, 0232005.MXF22P, or 0232005.MXP) is supported. These parts maintain identical electrical and mechanical specifications while offering ROHS3 compliance and expanded approval certifications (CE, KC, PSE).

The MSC-5A from OptiFuse provides an alternative sourcing option with equivalent electrical and mechanical parameters. This part carries cULus and UL 248 certifications, suitable for applications requiring North American regulatory compliance.

Selection between Littelfuse and OptiFuse variants should be based on supply chain requirements, certification needs, and existing qualification documentation for the application.

Frequently Asked Questions (FAQ)

Q: Can 0232005.MXF20P, 0232005.MXF22P, and 0232005.MXP be used interchangeably with 0232005.M?

A: Yes. All three parts are parametric equivalents with identical current rating (5A), voltage rating (250VAC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (100A). Differences exist only in packaging configuration and compliance certifications.

Q: What is the difference between 0232005.MXF20P, 0232005.MXF22P, and 0232005.MXP?

A: These three Littelfuse parts are electrically and mechanically identical. Designations reflect different packaging or distribution configurations. Selection should be based on procurement and inventory requirements.

Q: Is MSC-5A a direct replacement for 0232005.M?

A: MSC-5A meets all electrical and mechanical specifications for direct substitution. It is manufactured by OptiFuse rather than Littelfuse and carries different regulatory certifications (cULus, UL 248 versus CE, KC, PSE). Compatibility depends on application-specific certification requirements.

Q: Why do the substitute parts show different DC cold resistance values?

A: DC cold resistance variations (0.0134 Ohms for Littelfuse variants versus 0.0145 Ohms for the main part) fall within acceptable tolerance ranges for this component category and do not affect functional equivalence for fuse applications.

Q: What compliance considerations apply when substituting the obsolete 0232005.M?

A: The main part is RoHS non-compliant. All active substitutes are ROHS3 compliant. For applications subject to RoHS regulations, substitution with any active variant is required. Regulatory certifications differ by manufacturer: Littelfuse variants carry CE, KC, PSE approvals; MSC-5A carries cULus and UL 248 approvals.

Q: Are all substitute parts available in the same packaging as the original?

A: All substitute parts require a fuse holder for mounting, identical to the original 0232005.M. Packaging configurations (bulk versus other formats) may differ; consult specific part documentation for procurement details.

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