Littelfuse 0453002.MR Surface Mount Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0453002.MR is a 2 A, 125 V AC/DC surface mount board mount fuse in the NANO²® 453 series. This fast-blow fuse is designed for circuit protection in applications requiring compact, high-density mounting on printed circuit boards. The part is active in production with full inventory availability. Equivalent and substitute parts are identified to support procurement flexibility, design revisions, and supply chain continuity.

Substiute Parts

0453002.MR

Littelfuse Inc.In Stock: 119940453002.MR Datasheet

Current PartRFQ

0448002.MR

LittelfuseIn Stock: 137040448002.MR Datasheet

Parametric EquivalentRFQ

0451002.MRL

Littelfuse Inc.In Stock: 5464230451002.MRL Datasheet

Parametric EquivalentRFQ

0451002.NRL

Littelfuse Inc.In Stock: 42440451002.NRL Datasheet

Parametric EquivalentRFQ

SF-2410FP200T-2

Bourns Inc.In Stock: 2314SF-2410FP200T-2 Datasheet

DirectRFQ

SF-2410HI200T-2

Bourns Inc.In Stock: 3222SF-2410HI200T-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0453002.MR are grouped into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Littelfuse NANO²® Series):

• 0448002.MR (NANO²® 448 series)
• 0451002.MRL (NANO²® 451 series, Cut Tape & Digi-Reel® packaging)
• 0451002.NRL (NANO²® 451 series, Tape & Reel packaging)

These parts share identical electrical specifications: 2 A current rating, 125 V AC/DC voltage rating, fast-blow response, 50 A breaking capacity, and identical physical dimensions (0.240" L x 0.106" W x 0.106" H). All are surface mount, 2-SMD, square end block packages. Differences exist in melting I²t characteristics and DC cold resistance, which reflect internal design variations within the NANO²® product family while maintaining functional equivalence for standard circuit protection applications.

Direct Manufacturer Substitutes (Bourns SinglFuse™ Series):

• SF-2410FP200T-2 (SinglFuse™ SF-2410FP-T series)
• SF-2410HI200T-2 (SingleFuse™ SF-2410HI-T series)

These Bourns parts match the 0453002.MR in current rating (2 A), voltage rating (125 V AC/DC), response time (fast-blow), breaking capacity (50 A), and physical dimensions (0.240" L x 0.102" W x 0.102" H). Both are surface mount, 2-SMD, square end block packages. Differences in melting I²t and DC cold resistance reflect alternative thermal and electrical characteristics within the cross-manufacturer substitution range.

Key Parameters Determining Substitution:

• Current Rating: 2 A (mandatory match)
• Voltage Rating: 125 V AC and 125 V DC (mandatory match)
• Response Time: Fast Blow (mandatory match)
• Mounting Type: Surface Mount (mandatory match)
• Package / Case: 2-SMD, Square End Block (mandatory match)
• Breaking Capacity: 50 A (mandatory match)
• Physical Dimensions: Compatible within tolerance (0.240" L, width/height 0.102" to 0.106")

Parameter Comparison

Engineering Selection Recommendations

Littelfuse NANO²® Series Substitutes (0448002.MR, 0451002.MRL, 0451002.NRL):

These parts maintain full electrical and mechanical compatibility with the 0453002.MR. All three carry CSA, PSE, and UL approvals, matching the regulatory compliance profile of the primary part. Selection among these Littelfuse alternatives is driven by packaging requirements: 0451002.MRL offers Cut Tape & Digi-Reel® packaging for high-volume automated assembly, while 0448002.MR and 0451002.NRL provide standard Tape & Reel packaging. Melting I²t variations (0.53 to 0.812) reflect design differences within the NANO²® family but do not affect functional substitution for standard 2 A circuit protection applications.

Bourns SinglFuse™ Series Substitutes (SF-2410FP200T-2, SF-2410HI200T-2):

These cross-manufacturer alternatives provide electrical equivalence with UL and cUL approvals. Physical dimensions differ slightly in width and height (2.59mm versus 2.69mm), remaining within standard PCB layout tolerances for 2-SMD, square end block packages. The SF-2410HI200T-2 carries REACH Affected status, whereas the 0453002.MR and SF-2410FP200T-2 are REACH Unaffected. Melting I²t characteristics differ significantly (SF-2410HI200T-2 at 7.488 versus 0453002.MR at 0.53), reflecting distinct thermal response profiles suitable for different application requirements within the 2 A, 125 V specification envelope.

Regulatory and Compliance Considerations:

All substitute parts are active in production status with ROHS3 compliance and Moisture Sensitivity Level 1 (unlimited). Approval agency coverage varies: Littelfuse parts include CSA certification, while Bourns parts carry cUL in addition to UL. Design teams should verify that selected substitutes meet specific regional regulatory requirements for their end application.

Frequently Asked Questions (FAQ)

Q: Can the 0451002.MRL be used as a direct replacement for the 0453002.MR?

A: Yes. Both parts share identical electrical specifications (2 A, 125 V AC/DC, fast-blow, 50 A breaking capacity) and physical dimensions (6.10mm x 2.69mm x 2.69mm). The primary difference is packaging: 0451002.MRL uses Cut Tape & Digi-Reel® format, while 0453002.MR uses standard Tape & Reel. Functional performance in circuit protection is equivalent.

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

A: These series represent different design generations within the NANO²® product family. All three maintain identical electrical ratings (2 A, 125 V AC/DC) and physical dimensions for the 2-SMD, square end block package. Internal design variations result in different melting I²t characteristics: NANO²® 453 at 0.53, NANO²® 451 at 0.53, and NANO²® 448 at 0.812. These variations do not affect substitution compatibility for standard circuit protection applications.

Q: Are the Bourns SinglFuse™ parts physically compatible with the 0453002.MR?

A: The Bourns SF-2410FP200T-2 and SF-2410HI200T-2 have slightly smaller physical dimensions (6.10mm x 2.59mm x 2.59mm versus 6.10mm x 2.69mm x 2.69mm). This 0.10mm difference in width and height remains within standard PCB layout tolerances for 2-SMD, square end block packages and does not prevent board-level substitution.

Q: What is the significance of the melting I²t parameter in fuse selection?

A: Melting I²t defines the thermal energy required to melt the fuse element and is a key characteristic of fuse response time. The 0453002.MR has a melting I²t of 0.53, while the SF-2410HI200T-2 has 7.488. Both are fast-blow fuses rated for 2 A at 125 V, but the Bourns part exhibits a different thermal response curve. Selection should be based on application-specific requirements for circuit protection timing and thermal coordination with other protective devices.

Q: Can I substitute the 0453002.MR with the SF-2410HI200T-2 if my design requires REACH compliance?

A: The 0453002.MR is REACH Unaffected, while the SF-2410HI200T-2 is REACH Affected. If your application requires REACH Unaffected status, use the 0453002.MR, 0448002.MR, 0451002.MRL, 0451002.NRL, or SF-2410FP200T-2. Verify REACH compliance requirements with your regulatory or procurement team before substitution.

Q: What packaging options are available for equivalent 2 A, 125 V fuses?

A: Littelfuse offers standard Tape & Reel (0453002.MR, 0448002.MR, 0451002.NRL) and Cut Tape & Digi-Reel® (0451002.MRL) packaging. Bourns SinglFuse™ parts (SF-2410FP200T-2, SF-2410HI200T-2) are supplied in Tape & Reel format. Packaging selection depends on assembly equipment compatibility and production volume requirements.

Q: Are all substitute parts approved by the same regulatory agencies?

A: No. The 0453002.MR carries CSA, PSE, and UL approvals. Littelfuse NANO²® substitutes (0448002.MR, 0451002.MRL, 0451002.NRL) maintain the same approval set. Bourns SinglFuse™ parts carry cUL and UL approvals but do not include CSA or PSE. Verify that selected substitutes meet all required regional certifications for your application.