Littelfuse 025101.5PAT1L Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 025101.5PAT1L is a 1.5 A, 125 V AC/DC board mount fuse in axial package configuration, part of the PICO® II 251 series. This fast-blow fuse is designed for through-hole mounting applications requiring overcurrent protection in electronic circuits. The part maintains active product status with full regulatory compliance across multiple approval agencies. Substitute parts are identified based on identical electrical and mechanical specifications, with variations limited to packaging format only.

Substiute Parts

025101.5PAT1L

Littelfuse Inc.In Stock: 1149025101.5PAT1L Datasheet

Current PartRFQ

025101.5HAT1L

LittelfuseIn Stock: 1274025101.5HAT1L Datasheet

Parametric EquivalentRFQ

025101.5MAT1L

Littelfuse Inc.In Stock: 4338025101.5MAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 025101.5PAT1L are determined by electrical and mechanical parameter equivalence. The following parameters must remain identical for direct substitution:

• Current Rating: 1.5 A
• Voltage Rating (AC/DC): 125 V
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Package / Case: Axial
• Physical Dimensions: 0.110" Dia x 0.280" L (2.80mm x 7.11mm)
• Breaking Capacity: 50A AC, 300A DC
• DC Cold Resistance: 0.0823 Ohms
• Operating Temperature Range: -55°C ~ 125°C
• Approval Agencies: CSA, cURus, PSE, TUV
• RoHS Status: ROHS3 Compliant

The identified substitutes differ only in packaging format (Tape & Box versus Cut Tape), which does not affect electrical performance or mechanical compatibility in board mount applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—025101.5PAT1L, 025101.5HAT1L, and 025101.5MAT1L—are electrically and mechanically equivalent and maintain active product status. Selection between these parts is determined by packaging and supply chain requirements rather than technical performance.

The 025101.5PAT1L in Tape & Box packaging is suitable for applications requiring bulk quantities with protective packaging. The 025101.5HAT1L and 025101.5MAT1L in Cut Tape packaging are appropriate for automated assembly processes and applications with specific tape reel handling requirements.

All parts carry identical regulatory certifications (CSA, cURus, PSE, TUV) and ROHS3 compliance, ensuring equivalent compliance status across all three options.

Frequently Asked Questions (FAQ)

Q: Can 025101.5HAT1L or 025101.5MAT1L be used as direct replacements for 025101.5PAT1L?

A: Yes. All three parts are parametrically equivalent with identical electrical and mechanical specifications. The only difference is packaging format (Tape & Box versus Cut Tape), which does not affect functional performance or board mount compatibility.

Q: What is the difference between Tape & Box and Cut Tape packaging?

A: Tape & Box (TB) packaging provides fuses on tape with protective boxing for storage and handling. Cut Tape (CT) packaging provides fuses on tape without the outer box, typically used for automated pick-and-place assembly systems. Both formats contain the same component.

Q: Are all three parts ROHS3 compliant?

A: Yes. The 025101.5PAT1L, 025101.5HAT1L, and 025101.5MAT1L are all ROHS3 compliant with identical regulatory certifications.

Q: Do these fuses have the same breaking capacity?

A: Yes. All three parts have identical breaking capacity ratings of 50A AC and 300A DC at rated voltage.

Q: Can packaging format affect circuit performance?

A: No. Packaging format affects only supply chain handling and assembly processes. Once installed on the board, the fuse component itself is identical across all three part numbers, with no impact on electrical performance or protection characteristics.