Littelfuse 027502.5M Equivalent & Substitute Parts

Part Overview

The Littelfuse 027502.5M is a 2.5 A, 125 V AC/DC board mount axial fuse designed for through-hole applications. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The PICO® 275 series fuse provides fast-blow protection in compact axial packaging for circuit board protection applications.

Substiute Parts

027502.5M

Littelfuse Inc.In Stock: 897027502.5M Datasheet

Current PartRFQ

025102.5MXL

Littelfuse Inc.In Stock: 1987025102.5MXL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 027502.5M is determined by strict equivalence across the following critical parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Fuse Type: Board Mount, Cartridge Style Excluded (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Response Time: Fast Blow (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The Littelfuse 025102.5MXL meets all substitution criteria as a direct equivalent. This part belongs to the PICO® II 251 series and maintains identical electrical and mechanical specifications while offering active product status and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 025102.5MXL is the direct substitute for the obsolete 027502.5M. Selection of this substitute is based on:

• Identical electrical specifications (2.5 A, 125 V AC/DC, fast-blow response)
• Identical mechanical compatibility (through-hole, axial mounting)
• Active product status ensuring long-term availability
• Enhanced regulatory compliance (ROHS3 compliant vs. non-compliant original)
• Expanded approval certifications (CCC, CSA, cURus, PSE, TUV vs. UL only)
• Improved DC cold resistance specification (0.036 Ohms) and melting I²t rating (0.721)

The dimensional difference (0.110" vs. 0.093" diameter) requires board layout verification to confirm clearance compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 025102.5MXL be used as a direct replacement for the 027502.5M?

A: Yes. Both parts share identical current rating (2.5 A), voltage rating (125 V AC/DC), fuse type (board mount axial), mounting method (through-hole), and response time (fast-blow). The substitute is electrically and functionally equivalent.

Q: What is the primary reason to substitute the 027502.5M?

A: The 027502.5M is classified as obsolete. The 025102.5MXL provides equivalent functionality with active product status, ensuring continued availability and supply chain reliability.

Q: Are there dimensional differences between these parts?

A: Yes. The 027502.5M has a diameter of 0.093" (2.36mm), while the 025102.5MXL has a diameter of 0.110" (2.80mm). The length remains identical at 0.280" (7.11mm). Board layout verification is required to confirm clearance compatibility.

Q: Does the substitute offer improved compliance?

A: Yes. The 025102.5MXL is ROHS3 compliant, whereas the original 027502.5M is RoHS non-compliant. The substitute also carries expanded regulatory approvals (CCC, CSA, cURus, PSE, TUV) compared to the original (UL only).

Q: What is the packaging difference?

A: The original 027502.5M packaging is not specified. The 025102.5MXL is supplied in bulk packaging. Confirm packaging requirements for your procurement process.

Q: Are the electrical performance characteristics identical?

A: Core electrical specifications are identical. The substitute provides additional performance data: DC cold resistance of 0.036 Ohms and melting I²t of 0.721, which were not specified for the original part.