Littelfuse 025301.5NRT1L Equivalent & Substitute Parts

Part Overview

The Littelfuse 025301.5NRT1L is a 1.5 A board mount axial fuse rated for 125 V AC/DC operation, part of the PICO® II 253 series. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The substitute part maintains identical electrical and mechanical specifications while offering current product availability.

Substiute Parts

025301.5NRT1L

Littelfuse Inc.In Stock: 1025025301.5NRT1L Datasheet

Current PartRFQ

025301.5NRT1

Littelfuse Inc.In Stock: 1032025301.5NRT1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 025301.5NRT1 qualifies as a parametric equivalent to the 025301.5NRT1L based on the following criteria:

Identical Electrical Parameters:

• Current Rating: 1.5 A
• Voltage Rating: 125 V AC / 125 V DC
• Response Time: Fast Blow
• Breaking Capacity: 50 A AC, 300 A DC
• Melting I²t: 0.587
• DC Cold Resistance: 0.0823 Ohms

Identical Mechanical Parameters:

• Fuse Type: Board Mount (Cartridge Style Excluded)
• Mounting Type: Through Hole
• Package / Case: Axial
• Physical Dimensions: 0.103" Dia x 0.280" L (2.61 mm x 7.11 mm)

Identical Compliance & Environmental:

• Operating Temperature Range: -55°C to 125°C
• Approval Agencies: CSA, PSE, QPL, TUV, UR
• RoHS Status: ROHS3 Compliant

The primary distinction is product status and packaging format: the substitute part is active and available in Tape & Reel packaging, whereas the original is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The 025301.5NRT1 is the direct active equivalent for the obsolete 025301.5NRT1L. Both parts carry identical electrical ratings, mechanical specifications, and regulatory certifications (CSA, PSE, QPL, TUV, UR). The substitute part maintains ROHS3 compliance and operates across the same temperature range (-55°C to 125°C).

Selection of the 025301.5NRT1 is appropriate for new designs and replacement applications where the original part is no longer available. The Tape & Reel packaging of the substitute part is standard for production environments and does not affect functional performance or board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 025301.5NRT1 be used as a direct replacement for the 025301.5NRT1L?

A: Yes. Both parts are electrically and mechanically identical. The substitute is the active production equivalent of the obsolete original part.

Q: What is the difference between the two part numbers?

A: The primary difference is product status and packaging format. The 025301.5NRT1L is obsolete and supplied in standard packaging, while the 025301.5NRT1 is active and supplied in Tape & Reel format for automated assembly.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.103" diameter by 0.280" length (2.61 mm x 7.11 mm) and are axial through-hole components with identical footprints.

Q: Do both parts have the same voltage and current ratings?

A: Yes. Both are rated for 1.5 A at 125 V AC/DC with identical breaking capacity (50 A AC, 300 A DC) and response time (Fast Blow).

Q: Are regulatory certifications maintained in the substitute part?

A: Yes. The 025301.5NRT1 carries the same approvals as the original: CSA, PSE, QPL, TUV, and UR. Both are ROHS3 compliant.

Q: What is the operating temperature range for both parts?

A: Both parts operate from -55°C to 125°C, with identical thermal performance characteristics.