Littelfuse 0253.750M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0253.750M is a 750 mA board mount axial fuse rated for 125 V AC/DC operation. This component belongs to the PICO® II 253 series and is designed for through-hole mounting applications requiring fast-blow response characteristics. The part maintains active product status with full compliance to RoHS3, REACH, and multiple approval agencies including CSA, QPL, TUV, and UR. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and procurement optimization when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

0253.750M

Littelfuse Inc.In Stock: 11970253.750M Datasheet

Current PartRFQ

0253.750V

LittelfuseIn Stock: 15810253.750V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0253.750M are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic requires exact matching of the following key parameters:

• Current Rating: 750 mA
• Voltage Rating (AC/DC): 125 V
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Package / Case: Axial
• Breaking Capacity @ Rated Voltage: 50A AC, 300A DC
• Melting I²t: 0.153
• Operating Temperature Range: -55°C ~ 125°C
• Physical Dimensions: 0.103" Dia x 0.280" L (2.61mm x 7.11mm)
• DC Cold Resistance: 0.175 Ohms

Parts meeting these criteria are classified as parametric equivalents and may be used interchangeably in circuit designs without modification to board layout, schematic, or thermal management considerations.

Parameter Comparison

Engineering Selection Recommendations

Both the 0253.750M and 0253.750V maintain active product status within the PICO® II 253 series. The 0253.750V is a direct parametric equivalent with identical electrical performance, mechanical dimensions, and thermal characteristics. Selection between these parts may be based on inventory availability, lead time, or procurement source preference, as all critical specifications and compliance certifications are equivalent. The 0253.750V carries CSA, QPL, and UR approvals, while the 0253.750M includes additional TUV certification. Both parts satisfy RoHS3 and REACH compliance requirements for applications requiring environmental regulatory adherence.

Frequently Asked Questions (FAQ)

Q: Can the 0253.750V be used as a direct replacement for the 0253.750M in existing designs?

A: Yes. The 0253.750V is a parametric equivalent with identical current rating, voltage rating, response time, breaking capacity, melting I²t, physical dimensions, and DC cold resistance. No circuit modifications or board layout changes are required.

Q: Are there differences in approval certifications between these parts?

A: The 0253.750M carries CSA, QPL, TUV, and UR approvals. The 0253.750V carries CSA, QPL, and UR approvals. Both meet the same RoHS3 and REACH compliance standards. Selection should be based on specific certification requirements for your application.

Q: What are the critical parameters that define substitutability for this fuse?

A: Substitutability is determined by exact matching of current rating (750 mA), voltage rating (125 V AC/DC), response time (Fast Blow), breaking capacity (50A AC, 300A DC), melting I²t (0.153), physical dimensions (0.103" Dia x 0.280" L), and DC cold resistance (0.175 Ohms).

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. Both the 0253.750M and 0253.750V are rated for 125 V AC and 125 V DC operation with breaking capacities of 50A AC and 300A DC respectively.

Q: Are there any packaging or inventory considerations when selecting between these parts?

A: Both parts are supplied in bulk packaging. The 0253.750M has 1133 pcs in stock, while the 0253.750V has 1541 pcs in stock. Availability may influence procurement decisions based on project timeline requirements.