Littelfuse 02333.15M Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 02333.15M is a 3.15 A, 125 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, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for seamless integration into existing designs and procurement workflows.

Substiute Parts

02333.15M

Littelfuse Inc.In Stock: 93102333.15M Datasheet

Current PartRFQ

02323.15MX125P

Littelfuse Inc.In Stock: 74202323.15MX125P Datasheet

Parametric EquivalentRFQ

02323.15MXF5P

Littelfuse Inc.In Stock: 108002323.15MXF5P Datasheet

Parametric EquivalentRFQ

02333.15MXBP

LittelfuseIn Stock: 81602333.15MXBP Datasheet

Parametric EquivalentRFQ

02333.15MXP

Littelfuse Inc.In Stock: 190602333.15MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: current rating (3.15 A), voltage rating (125 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (10kA). All identified substitutes maintain these core electrical and mechanical specifications, ensuring direct functional replacement without circuit redesign or holder modification.

The substitute parts are grouped into two categories based on series designation and compliance status:

Series 233 Active Substitutes: Parts 02333.15MXP and 02333.15MXBP maintain the original series lineage with active product status and enhanced RoHS3 compliance.

Series 232 Active Substitutes: Parts 02323.15MX125P and 02323.15MXF5P represent cross-series alternatives with active status and RoHS3 compliance, differing only in melting I²t characteristics and breaking capacity specifications for 02323.15MXF5P.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 02333.15MXP

This part maintains series continuity with the original 02333.15M while offering active product status and ROHS3 compliance. It preserves identical electrical characteristics including 10kA breaking capacity, 0.038 Ohm DC cold resistance, and 29.795 melting I²t. Certification coverage includes CE, CSA, KC, PSE, and UL, providing broad regulatory acceptance. Inventory availability of 1805 units supports immediate procurement.

Secondary Recommendation: 02333.15MXBP

An alternative within Series 233 with equivalent electrical performance to 02333.15MXP. Offers the same regulatory certifications and RoHS3 compliance with 738 units in stock. Selection between 02333.15MXP and 02333.15MXBP depends on packaging preference (bulk) and supplier availability.

Cross-Series Alternative: 02323.15MX125P

Represents a Series 232 equivalent suitable for applications where lower DC cold resistance (0.0215 Ohms) and reduced melting I²t (21.95) are acceptable. Certifications include CE, KC, and PSE. This option is appropriate for designs where thermal characteristics differ from the original specification. Inventory of 719 units available.

Cross-Series Alternative: 02323.15MXF5P

Functionally equivalent to 02323.15MX125P with identical electrical parameters but reduced breaking capacity (100A versus 10kA). This part is suitable only for applications where the lower breaking capacity specification meets circuit protection requirements. Highest inventory availability at 986 units.

Frequently Asked Questions (FAQ)

Q: Can 02333.15MXP be used as a direct replacement for 02333.15M?

A: Yes. Both parts share identical current rating (3.15 A), voltage rating (125 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (10kA). The primary difference is product status (active versus obsolete) and enhanced RoHS3 compliance of the substitute.

Q: What is the significance of the melting I²t difference between Series 233 and Series 232 parts?

A: Melting I²t represents the thermal energy required to melt the fuse element. Series 233 parts (02333.15MXP, 02333.15MXBP) exhibit higher melting I²t values (29.795) compared to Series 232 parts (21.95). This parameter affects the fuse's thermal response characteristics. Selection should be based on circuit design requirements and thermal performance specifications.

Q: Are all substitute parts compatible with existing fuse holders designed for 02333.15M?

A: Yes. All substitute parts maintain the 5mm x 20mm form factor and cartridge glass type, ensuring mechanical compatibility with standard 5x20mm fuse holders. No holder modification or replacement is required.

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

A: Selection depends on target market and regulatory requirements. Series 233 parts (02333.15MXP, 02333.15MXBP) provide broader certification coverage including UL and CSA, suitable for North American applications. Series 232 parts (02323.15MX125P, 02323.15MXF5P) carry CE, KC, and PSE certifications, appropriate for European and Asian markets.

Q: Why does 02323.15MXF5P have a different breaking capacity (100A)?

A: Breaking capacity is the maximum fault current the fuse can safely interrupt. The 100A specification for 02323.15MXF5P differs from the 10kA standard. This part is suitable only for circuits where the lower breaking capacity specification aligns with system protection requirements.

Q: Is RoHS3 compliance mandatory for my application?

A: RoHS3 compliance is required for products sold in the European Union and certain other regulated markets. The original 02333.15M is RoHS non-compliant, while all substitute parts are ROHS3 compliant. Verify regulatory requirements for your target market and application.