Littelfuse 0233002.M Glass Cartridge Fuse 2A 125VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0233002.M is a 2A 125VAC 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 that maintain identical electrical and mechanical specifications. Substitute parts must preserve the 2A current rating, 125V AC voltage rating, 5x20mm form factor, and medium-blow response time to ensure direct functional replacement in existing designs.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	125 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Breaking Capacity @ Rated Voltage	10 kA
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (2A), voltage rating (125V AC), fuse type (cartridge glass), package dimensions (5x20mm), response time (medium blow), breaking capacity (10kA), and operating temperature range (-55°C to 125°C). All identified substitute parts maintain these core electrical and mechanical specifications. Differences in series designation, packaging format (bulk vs. tape), RoHS compliance status, and approval agency certifications do not affect functional interchangeability within the specified electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (A)	Voltage Rating (V AC)	Package	Response Time	Breaking Capacity (kA)	Melting I²t	DC Cold Resistance (Ω)	Product Status	RoHS Status
0233002.M	Littelfuse Inc.	233	2	125	5x20mm	Medium Blow	10	10.2	0.068	Obsolete	RoHS non-compliant
0232002.MX125P	Littelfuse Inc.	232	2	125	5x20mm	Medium Blow	10	8.25	0.037	Active	ROHS3 Compliant
0232002.MXF22125P	Littelfuse Inc.	232	2	125	5x20mm	Medium Blow	10	8.25	0.037	Active	ROHS3 Compliant
0233002.MXBP	Littelfuse Inc.	233	2	125	5x20mm	Medium Blow	10	9.97	0.0684	Active	ROHS3 Compliant
0233002.MXF34P	Littelfuse Inc.	233	2	125	5x20mm	Medium Blow	10	9.97	0.0684	Active	ROHS3 Compliant
0233002.MXP	Littelfuse Inc.	233	2	125	5x20mm	Medium Blow	10	9.97	0.0684	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain functional equivalence to the 0233002.M across critical electrical parameters. Selection between active alternatives should prioritize parts with ROHS3 compliance status for new designs and procurement cycles. The 0233002.MXP, 0233002.MXBP, and 0233002.MXF34P variants share the same series designation (233) as the original part and offer expanded approval agency certifications (CE, CSA, KC, PSE, UL). The 0232002.MX125P and 0232002.MXF22125P alternatives from series 232 provide equivalent electrical performance with ROHS3 compliance and reduced DC cold resistance (0.037Ω vs. 0.068Ω), suitable for applications where lower resistance characteristics are acceptable. Melting I²t values remain within acceptable tolerance ranges across all substitutes, with series 233 variants (9.97) closely matching the original specification (10.2) compared to series 232 variants (8.25).

Frequently Asked Questions (FAQ)

Q: Can 0232002.MX125P replace 0233002.M directly? A: Yes. Both parts maintain identical current rating (2A), voltage rating (125V AC), package dimensions (5x20mm), response time (medium blow), and breaking capacity (10kA). The lower melting I²t (8.25 vs. 10.2) and reduced DC cold resistance (0.037Ω vs. 0.068Ω) remain within acceptable operating parameters for this fuse category.

Q: What is the difference between series 232 and series 233 substitutes? A: Series designation reflects internal design variations. Both series maintain identical electrical ratings and mechanical form factors. Series 233 variants (0233002.MXBP, 0233002.MXF34P, 0233002.MXP) exhibit melting I²t values (9.97) closer to the original specification (10.2), while series 232 variants (0232002.MX125P, 0232002.MXF22125P) provide lower DC cold resistance (0.037Ω).

Q: Are all substitutes ROHS3 compliant? A: All active substitute parts listed carry ROHS3 compliance status. The original 0233002.M is classified as RoHS non-compliant due to its obsolete status.

Q: Does packaging format affect electrical performance? A: No. Bulk packaging and tape packaging formats do not alter electrical characteristics. Selection between packaging options depends on procurement and assembly process requirements.

Q: What approval agencies certify these fuses? A: The original 0233002.M carries CSA, K-MARK, METI, and UL approvals. Active substitutes carry CE, CSA, KC, PSE, and UL certifications, providing broader regulatory coverage for international applications.

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