Littelfuse 0232001.MXEP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232001.MXEP is a 1 A, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm axial form factor. This through-hole mounted fuse is designed for circuit protection in applications requiring medium-blow response characteristics. The part maintains active product status with full RoHS3 compliance and international approval certifications. Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative sourcing while maintaining equivalent electrical and mechanical performance.

Substiute Parts

0232001.MXEP

Littelfuse Inc.In Stock: 18270232001.MXEP Datasheet

Current PartRFQ

0234001.MXEP

Littelfuse Inc.In Stock: 28210234001.MXEP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 0234001.MXEP is classified as a parametric equivalent based on the following critical parameters that determine substitutability:

Electrical Parameters (Must Match):

• Current Rating: 1 A
• Voltage Rating (AC): 250 V
• Breaking Capacity @ Rated Voltage: 100 A

Mechanical Parameters (Must Match):

• Fuse Type: Cartridge, Glass
• Package / Case: 5mm x 20mm (Axial)
• Mounting Type: Through Hole

Environmental & Compliance Parameters (Must Match):

• Operating Temperature Range: -55°C to 125°C
• RoHS Status: ROHS3 Compliant
• Product Status: Active

The substitute part maintains identical electrical protection characteristics and physical form factor, enabling direct circuit board compatibility. Variations in melting I²t, DC cold resistance, and approval agency certifications do not affect substitutability within the defined electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the 0232001.MXEP and 0234001.MXEP maintain active product status and full RoHS3 compliance, qualifying both for new design implementations. The 0234001.MXEP carries expanded approval certifications including CSA, K-MARK, and UL, providing broader geographic and application coverage. Selection between these parts should be based on inventory availability, supply chain lead times, and specific regional certification requirements for the end application. Both parts satisfy identical electrical protection requirements and physical mounting constraints.

Frequently Asked Questions (FAQ)

Q: Can the 0234001.MXEP directly replace the 0232001.MXEP in existing designs?

A: Yes. Both parts share identical current rating (1 A), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm axial), and mounting configuration (through hole). Direct substitution on the circuit board is mechanically and electrically compatible.

Q: What is the significance of the different melting I²t values?

A: The melting I²t values (1.373 vs. 1.975) reflect internal construction variations within the same fuse classification. Both parts maintain the same medium-blow response time and current rating, ensuring equivalent circuit protection behavior at the specified 1 A rating.

Q: Why do the approval certifications differ between these parts?

A: The 0234001.MXEP includes additional certifications (CSA, K-MARK, UL) beyond the 0232001.MXEP (CE, KC, PSE). These certifications expand the part's qualification for specific regional markets and applications. Selection should align with the geographic and regulatory requirements of the target application.

Q: Are there any thermal or environmental differences between these parts?

A: Both parts operate across the identical temperature range (-55°C to 125°C) and maintain equivalent environmental compliance. No thermal or environmental performance differentiation exists between the two parts.

Q: What does the DC cold resistance difference indicate?

A: The DC cold resistance variation (0.0923 Ω vs. 0.175 Ω) reflects internal element design differences. This parameter does not affect substitutability, as both parts meet the same electrical protection specification at the 1 A rating and 250 V AC voltage.