Littelfuse 0232001.MXF5P Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232001.MXF5P is a 1 A, 250 V AC/DC glass cartridge fuse with a 5mm × 20mm form factor, designed for applications requiring medium-blow response characteristics. This fuse is an active product with full compliance to CE, KC, and PSE standards. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and functional characteristics align with the original specification, enabling direct replacement in holder-based fuse applications.

Substiute Parts

0232001.MXF5P

Littelfuse Inc.In Stock: 7880232001.MXF5P Datasheet

Current PartRFQ

0232001.MXP

Littelfuse Inc.In Stock: 12330232001.MXP Datasheet

Parametric EquivalentRFQ

0234001.MXP

Littelfuse Inc.In Stock: 18700234001.MXP Datasheet

Parametric EquivalentRFQ

MSC-1A

OptiFuseIn Stock: 1961MSC-1A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0232001.MXF5P are qualified based on the following critical parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm × 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Medium Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

All identified substitutes meet these core electrical and mechanical criteria. Variations in secondary parameters such as melting I²t, DC cold resistance, and approval agencies do not preclude substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse 0232001.MXP: This part is a direct parametric equivalent to the 0232001.MXF5P, sharing identical electrical ratings, mechanical dimensions, and thermal characteristics. Both parts carry CE, KC, and PSE certifications. Selection between these two Littelfuse variants may be based on inventory availability or packaging preferences.

Littelfuse 0234001.MXP: This substitute maintains all critical electrical and mechanical parameters. The 0234001.MXP is part of the 234 series and carries expanded approval certifications including CE, CSA, K-MARK, PSE, and UL. The melting I²t value (1.975) and DC cold resistance (0.175 Ohms) differ from the main part, reflecting design variations within the same functional class. This part is suitable for applications requiring broader regulatory compliance.

OptiFuse MSC-1A: This substitute from OptiFuse meets all core electrical and mechanical requirements. The MSC-1A carries cULus and UL 248 certifications. The melting I²t value (2.112) represents a higher thermal energy threshold compared to the main part. This part is suitable for applications where UL certification is a primary requirement.

All substitutes are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can the 0232001.MXP be used as a direct replacement for the 0232001.MXF5P?

A: Yes. Both parts share identical current rating (1 A), voltage rating (250 V AC), package dimensions (5mm × 20mm), response time (medium blow), and operating temperature range (-55°C to 125°C). They are parametrically equivalent.

Q: What is the difference between the 0234001.MXP and the 0232001.MXF5P?

A: The 0234001.MXP maintains all critical electrical and mechanical parameters. Differences include melting I²t (1.975 vs. 1.373) and DC cold resistance (0.175 vs. 0.0923 Ohms). The 0234001.MXP also carries additional certifications (CSA, K-MARK, UL) beyond the original part's CE, KC, and PSE approvals.

Q: Is the OptiFuse MSC-1A compatible with the same holder as the Littelfuse parts?

A: Yes. The MSC-1A shares the identical 5mm × 20mm package dimensions and requires the same holder type as all listed substitutes.

Q: Why do the melting I²t values differ among substitutes?

A: Melting I²t reflects the thermal energy required to melt the fuse element and is a design characteristic of each manufacturer's fuse construction. Variations in this parameter do not affect substitutability when all primary electrical and mechanical parameters match.

Q: Which substitute should I select if UL certification is required?

A: The OptiFuse MSC-1A carries cULus and UL 248 certifications. The Littelfuse 0234001.MXP carries UL certification along with CE, CSA, and K-MARK approvals.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes, including the main part, are ROHS3 compliant.