Littelfuse 0253003.M Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0253003.M is a 3 A, 125 V AC/DC board mount fuse with axial through-hole packaging. This component is classified as Active product status and is designed for circuit protection in applications requiring fast-blow response characteristics. The fuse operates across a temperature range of -55°C to 125°C and meets multiple international approval standards including CCC, CSA, PSE, QPL, TUV, and UR certifications. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and maintains compliance with system-level requirements when the primary part becomes unavailable.

Substiute Parts

0253003.M

Littelfuse Inc.In Stock: 21020253003.M Datasheet

Current PartRFQ

0253003.V

Littelfuse Inc.In Stock: 13220253003.V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0253003.M are determined by strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters that must remain identical:

• Current Rating: 3 A
• Voltage Rating (AC/DC): 125 V / 125 V
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Package / Case: Axial
• Breaking Capacity @ Rated Voltage: 50A AC, 300A DC
• Operating Temperature Range: -55°C ~ 125°C
• Size / Dimension: 0.103" Dia x 0.280" L (2.61mm x 7.11mm)
• DC Cold Resistance: 0.029 Ohms
• Melting I²t: 1.19

Parts meeting all these criteria are classified as parametric equivalents and may be used interchangeably in circuit protection applications without design modification.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0253003.V is a direct parametric equivalent to the 0253003.M. Both parts are manufactured by Littelfuse Inc., belong to the PICO® II 253 series, and maintain identical electrical and mechanical specifications. Both parts carry Active product status and hold the same international certifications (CCC, CSA, PSE, QPL, TUV, UR), ensuring compliance with regulatory requirements across multiple markets. The parts are interchangeable for circuit protection applications requiring 3 A fast-blow protection at 125 V AC/DC with through-hole axial mounting. Selection between these parts may be based on inventory availability and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can the 0253003.V be used as a direct replacement for the 0253003.M?

A: Yes. The 0253003.V is a parametric equivalent with identical electrical ratings (3 A, 125 V AC/DC), response time (fast blow), breaking capacity (50A AC, 300A DC), physical dimensions (0.103" Dia x 0.280" L), and thermal characteristics. Both parts are ROHS3 compliant and hold identical international approvals.

Q: Are there any differences in packaging or mounting between these parts?

A: No. Both parts use identical through-hole axial packaging and mounting configuration. Physical dimensions and footprint are identical at 0.103" Dia x 0.280" L (2.61mm x 7.11mm).

Q: Do both parts meet the same compliance and certification standards?

A: Yes. Both the 0253003.M and 0253003.V carry identical approval agencies: CCC, CSA, PSE, QPL, TUV, and UR. Both are ROHS3 compliant and REACH unaffected.

Q: What is the operating temperature range for these fuses?

A: Both parts operate across -55°C to 125°C, ensuring functionality across industrial and commercial temperature environments.

Q: Are there any electrical performance differences between the two part numbers?

A: No. Both parts have identical DC cold resistance (0.029 Ohms) and melting I²t (1.19), ensuring identical electrical performance and protection characteristics.