Littelfuse 0232003.MXE Glass Cartridge Fuse 3A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232003.MXE is a 3A 250VAC glass cartridge fuse with 5mm x 20mm axial dimensions, designed for through-hole mounting in electronic circuits requiring overcurrent protection. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for seamless circuit board integration.

Substiute Parts

0232003.MXE

Littelfuse Inc.In Stock: 10960232003.MXE Datasheet

Current PartRFQ

0232003.MXEP

Littelfuse Inc.In Stock: 10920232003.MXEP Datasheet

Parametric EquivalentRFQ

0234003.MXEP

Littelfuse Inc.In Stock: 7530234003.MXEP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0232003.MXE is determined by strict equivalence across the following critical parameters:

• Current Rating: 3 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Response Time: Medium Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 100A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

Both identified substitute parts meet all mandatory electrical and mechanical parameters. Differences in secondary characteristics such as DC Cold Resistance, Melting I²t, and regulatory certifications do not affect functional interchangeability within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status, addressing the obsolescence of the 0232003.MXE.

The 0232003.MXEP offers the closest parametric alignment to the original part, with DC Cold Resistance (0.0226 Ohms) and Melting I²t (17.19) values nearest to the main part specifications. This part carries CE, KC, and PSE certifications and is ROHS3 compliant.

The 0234003.MXEP provides an alternative with expanded regulatory certifications including CE, CSA, K-MARK, PSE, and UL approval. This part exhibits higher DC Cold Resistance (0.0431 Ohms) and Melting I²t (26.24), reflecting design differences within the same functional class. ROHS3 compliance is confirmed.

Selection between these substitutes depends on specific regulatory requirements for the end application and regional compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can 0232003.MXEP and 0234003.MXEP be used interchangeably with 0232003.MXE?

A: Both parts meet all mandatory electrical and mechanical parameters: 3A current rating, 250V AC voltage rating, medium blow response time, 100A breaking capacity, 5mm x 20mm axial package, and -55°C to 125°C operating temperature range. They are functionally equivalent for circuit protection applications.

Q: What is the difference between the two substitute parts?

A: The primary differences are DC Cold Resistance (0.0226 Ohms for 0232003.MXEP versus 0.0431 Ohms for 0234003.MXEP) and Melting I²t values (17.19 versus 26.24). Both parts maintain identical voltage, current, and thermal operating specifications. Regulatory certifications differ, with 0234003.MXEP carrying additional UL and CSA approvals.

Q: Are the substitute parts RoHS compliant?

A: Both 0232003.MXEP and 0234003.MXEP are ROHS3 compliant, whereas the original 0232003.MXE is RoHS non-compliant.

Q: Will these parts fit existing PCB footprints designed for 0232003.MXE?

A: Yes. All three parts share identical through-hole mounting type and 5mm x 20mm axial package dimensions (0.228" diameter x 0.886" length), ensuring direct mechanical compatibility with existing circuit board designs.

Q: Which substitute should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring UL certification, 0234003.MXEP is specified. For general industrial applications, 0232003.MXEP provides closer parametric alignment to the original part. Both are active products with confirmed inventory availability.