Littelfuse 0232002.MXF22P Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232002.MXF22P is a 2 A, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor. This fuse is designed for applications requiring medium-blow response characteristics and is actively manufactured. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional performance parameters to ensure direct interchangeability in fuse holder applications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Medium Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C to 125°C
Mounting Type	Requires Holder
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0232002.MXF22P is determined by the following critical parameters:

Current Rating: 2 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required for holder compatibility)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Medium Blow (exact match required for circuit protection characteristics)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed maintain these core parameters. Variations in secondary parameters such as melting I²t, DC cold resistance, and approval agencies do not affect functional interchangeability within the specified electrical and mechanical constraints.

Parameter Comparison

Parameter	0232002.MXF22P	0232002.MXP	0234002.MXP	0234002.MXBP	MSC-2A
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	OptiFuse
Current Rating (Amps)	2 A	2 A	2 A	2 A	2 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
Response Time	Medium Blow	Medium Blow	Medium Blow	Medium Blow	Medium Blow
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Breaking Capacity @ Rated Voltage	100 A	100 A	100 A	100 A	100 A
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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active
Melting I²t	8.25	8.25	9.97	9.97	4.888
DC Cold Resistance (Ohms)	0.037	0.037	0.0684	0.0684	Not specified

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and maintain identical electrical ratings and mechanical dimensions to the Littelfuse 0232002.MXF22P.

Littelfuse Series 232 (0232002.MXF22P and 0232002.MXP): These parts are functionally identical with matching melting I²t and DC cold resistance values. Approval agencies include CE, KC, and PSE.

Littelfuse Series 234 (0234002.MXP and 0234002.MXBP): These parts maintain all critical electrical and mechanical parameters. Series 234 variants feature expanded approval agency coverage including CSA, K-MARK, and UL, with slightly elevated melting I²t (9.97) and DC cold resistance (0.0684 Ohms) compared to Series 232.

OptiFuse MSC-2A: This part meets all core substitution criteria with identical current, voltage, and package specifications. Approval is cULus and UL 248. The melting I²t value (4.888) differs from Littelfuse variants, reflecting different thermal response characteristics within the medium-blow classification.

Selection among these substitutes depends on application-specific approval requirements and thermal response tolerance.

Frequently Asked Questions (FAQ)

Q: Can the 0232002.MXP be used as a direct replacement for the 0232002.MXF22P?

A: Yes. Both parts share identical current rating (2 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), response time (medium blow), and DC cold resistance (0.037 Ohms). They are functionally equivalent.

Q: What is the difference between Littelfuse Series 232 and Series 234 fuses?

A: Series 232 and Series 234 maintain identical electrical ratings and mechanical dimensions. Series 234 variants feature expanded regulatory approvals (CSA, K-MARK, UL) and differ in melting I²t (9.97 vs. 8.25) and DC cold resistance (0.0684 vs. 0.037 Ohms). Both are medium-blow response fuses suitable for the same holder applications.

Q: Is the OptiFuse MSC-2A compatible with the same fuse holder as the Littelfuse 0232002.MXF22P?

A: Yes. The MSC-2A maintains the identical 5mm x 20mm package dimensions and requires the same holder type. All electrical ratings (2 A, 250 V AC, medium blow, 100 A breaking capacity) are matched.

Q: Does the difference in melting I²t between substitute parts affect interchangeability?

A: Melting I²t is a secondary thermal characteristic that reflects the energy required to melt the fuse element. All listed substitutes maintain the medium-blow response classification and identical current/voltage ratings. Differences in melting I²t do not prevent mechanical or electrical interchangeability within the specified operating parameters.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (0232002.MXP, 0234002.MXP, 0234002.MXBP, and MSC-2A) are ROHS3 compliant.

Q: Which substitute part has the broadest regulatory approval coverage?

A: The Littelfuse Series 234 variants (0234002.MXP and 0234002.MXBP) include approvals for CE, CSA, K-MARK, PSE, and UL, providing the widest regulatory acceptance across markets.

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