Littelfuse 0874.250MXEP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0874.250MXEP is a 250 mA, 250 V AC/DC ceramic cartridge fuse with fast-blow response characteristics. This through-hole component is designed for circuit protection in applications requiring reliable overcurrent interruption. The part maintains active product status with 974 units currently in stock. Substitute parts become necessary when addressing obsolescence concerns, managing inventory constraints, or accommodating specific compliance requirements in production environments.

Substiute Parts

0874.250MXEP

Littelfuse Inc.In Stock: 10220874.250MXEP Datasheet

Current PartRFQ

0876.250MXEP

Littelfuse Inc.In Stock: 20710876.250MXEP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0874.250MXEP is determined by strict alignment of the following critical parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Cartridge, Non-Standard (Axial) (exact match required)
• Size / Dimension: 0.142" Dia x 0.394" L (3.60mm x 10.00mm) (exact match required)

The Littelfuse 0876.250MXEP qualifies as a parametric equivalent based on these core electrical and mechanical specifications. Differences in secondary parameters such as breaking capacity, melting I²t, and product status do not disqualify substitution when primary functional parameters align.

Parameter Comparison

Engineering Selection Recommendations

The 0874.250MXEP maintains active product status and is the preferred selection for new designs and ongoing production. This part carries cULus approval and meets ROHS3 compliance requirements.

The 0876.250MXEP is classified as obsolete and carries both cULus and VDE approvals. While this substitute meets all primary electrical and mechanical parameters, its obsolete status limits its suitability for new applications. Selection of the 0876.250MXEP is appropriate only when existing inventory must be utilized or when legacy system maintenance requires component-level compatibility with previously deployed assemblies.

Frequently Asked Questions (FAQ)

Q: Can the 0876.250MXEP replace the 0874.250MXEP in new production?

A: The 0876.250MXEP meets all primary electrical and mechanical specifications required for functional equivalence. However, its obsolete product status makes it unsuitable for new production. The 0874.250MXEP is the recommended choice for new designs.

Q: What are the key differences between these two parts?

A: Both parts share identical current rating (250 mA), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (fast blow), mounting type (through hole), and physical dimensions. Differences exist in breaking capacity (50A vs. 35A), melting I²t (0.03 vs. 0.11), DC cold resistance (0.692 Ohms vs. 0.573 Ohms), and product status (active vs. obsolete).

Q: Are the physical dimensions identical?

A: Yes. Both parts use the same cartridge form factor: 0.142" diameter x 0.394" length (3.60mm x 10.00mm). They are mechanically interchangeable in through-hole mounting applications.

Q: Do both parts meet the same compliance standards?

A: The 0874.250MXEP carries cULus approval. The 0876.250MXEP carries both cULus and VDE approvals. Both are ROHS3 compliant. The additional VDE certification on the substitute does not create incompatibility.

Q: What is the significance of the different breaking capacity ratings?

A: The 0874.250MXEP has a breaking capacity of 50A at rated voltage, while the 0876.250MXEP has 35A. Breaking capacity defines the maximum fault current the fuse can safely interrupt. Application requirements must be evaluated to determine if the lower breaking capacity of the substitute is acceptable.