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

Part Overview

The Littelfuse 0232005.MXW is a 5 A, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor, designed for applications requiring medium-blow response characteristics. This part is classified as obsolete and requires a fuse holder for installation. Due to its obsolete status, equivalent and substitute parts from active product lines are available to maintain circuit protection functionality in existing and new designs.

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 of the 0232005.MXW is determined by electrical and mechanical parameter matching:

Primary Substitution Criteria:

Current Rating: 5 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Response Time: Medium Blow (exact match required)
Breaking Capacity: 100A (exact match required)
Operating Temperature: -55°C ~ 125°C (exact match required)

Mounting Consideration: The 0232005.MXW requires a fuse holder. The substitute part 0232005.MXEP differs in mounting type (Through Hole vs. Requires Holder) and physical dimensions (5.80mm x 22.50mm vs. 5.20mm x 20.00mm), making it suitable only for applications where the mounting configuration and holder specifications can accommodate the dimensional change.

All other substitute parts (0232005.MXF20P, 0232005.MXF22P, 0232005.MXP, and MSC-5A) maintain identical mounting requirements and package dimensions, providing direct functional equivalence.

Parameter Comparison

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

Engineering Selection Recommendations

Littelfuse 0232005.MXEP: This part is the manufacturer-recommended substitute. It maintains all electrical parameters and is ROHS3 compliant with active product status. However, it features Through Hole mounting and increased physical dimensions (5.80mm x 22.50mm), requiring verification that the application's fuse holder or mounting configuration can accommodate these changes.

Littelfuse 0232005.MXF20P, 0232005.MXF22P, and 0232005.MXP: These parts provide parametric equivalence with identical mounting requirements (Requires Holder) and package dimensions (5mm x 20mm). All three are ROHS3 compliant with active product status and CE, KC, PSE certifications. These parts are direct mechanical and electrical substitutes for the 0232005.MXW.

OptiFuse MSC-5A: This part meets all electrical and mechanical parameters with active product status and ROHS3 compliance. It carries cULus and UL 248 certifications. The melting I²t value (51.13) is lower than the main part and Littelfuse substitutes, which may affect response characteristics in specific circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the 0232005.MXEP be used as a direct replacement for the 0232005.MXW?

A: The 0232005.MXEP matches all electrical parameters but differs in mounting type and physical dimensions. It is suitable only if the application's mounting configuration can accommodate Through Hole installation and the larger 5.80mm x 22.50mm form factor.

Q: What is the difference between the Littelfuse substitute parts (0232005.MXF20P, 0232005.MXF22P, 0232005.MXP)?

A: All three parts are parametrically equivalent with identical electrical ratings, mounting requirements, and package dimensions. They differ only in packaging and inventory availability. Selection among these parts depends on procurement requirements and stock levels.

Q: Is the OptiFuse MSC-5A electrically equivalent to the 0232005.MXW?

A: The MSC-5A matches all primary electrical parameters (5 A, 250 V, 100A breaking capacity, medium-blow response). The melting I²t value differs (51.13 vs. 58.25), which may affect fuse response timing in specific circuit conditions.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (0232005.MXEP, 0232005.MXF20P, 0232005.MXF22P, 0232005.MXP, and MSC-5A) are ROHS3 compliant. The main part 0232005.MXW is RoHS non-compliant.

Q: What certifications should I consider when selecting a substitute?

A: The Littelfuse substitutes carry CE, KC, and PSE certifications. The OptiFuse MSC-5A carries cULus and UL 248 certifications. Selection depends on the regulatory requirements of the target application and market.

Q: Can I use these parts interchangeably in my circuit?

A: Parts with identical mounting types and package dimensions (0232005.MXF20P, 0232005.MXF22P, 0232005.MXP, and MSC-5A) are mechanically interchangeable. The 0232005.MXEP requires mounting configuration verification due to its Through Hole design and larger dimensions.

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