SF-2410FP025T-2 Equivalent & Substitute Parts

Part Overview

The SF-2410FP025T-2 is a 250 mA surface mount board mount fuse manufactured by Bourns Inc. under the SinglFuse™ SF-2410FP-T series. This component is rated for 125 V AC and 125 V DC operation with fast blow response characteristics. The part maintains active product status and is ROHS3 compliant with cUL and UL approvals. Equivalent substitute parts are necessary when primary inventory is unavailable or when design flexibility across approved alternatives is required for supply chain optimization.

Substiute Parts

SF-2410FP025T-2

Bourns Inc.In Stock: 2011SF-2410FP025T-2 Datasheet

Current PartRFQ

0448.250MR

Littelfuse Inc.In Stock: 102340448.250MR Datasheet

DirectRFQ

0451.250MRL

Littelfuse Inc.In Stock: 204240451.250MRL Datasheet

DirectRFQ

0451.250NRL

Littelfuse Inc.In Stock: 19270451.250NRL Datasheet

DirectRFQ

0453.250MR

Littelfuse Inc.In Stock: 101740453.250MR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SF-2410FP025T-2 is determined by strict equivalence across the following critical parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 2-SMD, Square End Block (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Approval Agencies: cUL and/or UL certification (required)
• RoHS Status: ROHS3 Compliant (required)

All four substitute parts listed below meet these criteria and are manufactured by Littelfuse Inc. under the NANO²® series. Variations in secondary parameters such as DC Cold Resistance and Melting I²t do not affect substitution eligibility when primary electrical and mechanical specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts maintain active product status and carry UL approval certification, meeting the regulatory requirements established for the SF-2410FP025T-2. The Littelfuse NANO²® 448, 451, and 453 series components are ROHS3 compliant and carry CSA and UL certifications, providing equivalent compliance coverage for applications requiring cUL or UL approval.

Physical dimensions show minor variations in width and height (0.106" versus 0.102"), with length remaining constant at 0.240". These dimensional differences are within standard PCB footprint tolerances for 2-SMD, Square End Block packages and do not affect board-level compatibility.

DC Cold Resistance and Melting I²t values differ across the substitute options. These secondary parameters do not alter the primary substitution eligibility when all critical electrical and mechanical specifications remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 0448.250MR, 0451.250MRL, 0451.250NRL, and 0453.250MR be used interchangeably with the SF-2410FP025T-2?

A: Yes. All four parts meet the substitution criteria: identical current rating (250 mA), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting type (Surface Mount), package configuration (2-SMD, Square End Block), breaking capacity (50 A), and operating temperature range (-55°C ~ 125°C). All parts carry UL certification and are ROHS3 compliant.

Q: Are there physical compatibility concerns with the dimensional differences?

A: The substitute parts measure 0.240" L x 0.106" W x 0.106" H compared to the original 0.240" L x 0.102" W x 0.102" H. The 0.004" increase in width and height falls within standard PCB footprint design tolerances for this package type and does not compromise board-level compatibility.

Q: What is the difference between the Littelfuse NANO²® 448, 451, and 453 series?

A: These series designations identify different product lines within the Littelfuse NANO²® family. All three series meet the electrical and mechanical specifications required for substitution with the SF-2410FP025T-2. Series selection does not affect functional equivalence.

Q: Do the DC Cold Resistance variations affect circuit performance?

A: DC Cold Resistance values range from 0.5765 Ohms to 1.119 Ohms across the part options. These variations are secondary parameters that do not alter substitution eligibility when primary electrical specifications remain identical. Circuit design validation should account for these resistance values if precision current limiting is critical.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All substitute parts are supplied in Tape & Reel (TR) packaging, matching the original SF-2410FP025T-2 packaging format.

Q: What certifications apply to the substitute parts?

A: The substitute parts carry CSA and UL certifications. The original SF-2410FP025T-2 carries cUL and UL certifications. Both certification sets meet standard regulatory requirements for board mount fuse applications.