Equivalent & Substitute Parts for Littelfuse 0451.160MR Surface Mount Fuse

Part Overview

The Littelfuse 0451.160MR is a 160 mA, 125 V AC/DC surface mount board fuse in the NANO²® 451 series with a 2-SMD square end block package. This part is currently obsolete, making identification of equivalent and substitute components essential for ongoing design support, maintenance, and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within the same application category.

Substiute Parts

0451.160MR

Littelfuse Inc.In Stock: 8910451.160MR Datasheet

Current PartRFQ

0451.160MRL

LittelfuseIn Stock: 54700451.160MRL Datasheet

DirectRFQ

0453.160MR

Littelfuse Inc.In Stock: 20850453.160MR Datasheet

MFR RecommendedRFQ

0448.160MR

Littelfuse Inc.In Stock: 74050448.160MR Datasheet

Parametric EquivalentRFQ

0451.160NRL

Littelfuse Inc.In Stock: 10160451.160NRL Datasheet

Parametric EquivalentRFQ

0453.160NR

Littelfuse Inc.In Stock: 8000453.160NR Datasheet

Parametric EquivalentRFQ

SF-2410FP016T-2

Bourns Inc.In Stock: 2765SF-2410FP016T-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

• Current Rating: 160 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: 50A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

All identified substitute parts meet these core electrical and mechanical requirements. Variations in secondary parameters such as melting I²t, DC cold resistance, and RoHS compliance status do not disqualify substitution eligibility but are documented for engineering reference.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts satisfy the core electrical and mechanical requirements for direct replacement of the obsolete 0451.160MR. Selection should prioritize active product status and current compliance certifications:

Littelfuse NANO²® 451 series substitutes (0451.160MRL, 0451.160NRL) maintain identical series lineage and electrical characteristics. Both parts are active and ROHS3 compliant, with CSA and UL approvals matching the original specification.

Littelfuse NANO²® 453 series substitutes (0453.160MR, 0453.160NR) represent the manufacturer-recommended upgrade path, offering active product status and ROHS3 compliance with equivalent electrical performance.

Littelfuse NANO²® 448 series substitute (0448.160MR) is active and ROHS3 compliant with CSA and UR approvals. This part exhibits lower melting I²t (0.0028 versus 0.0048) and higher DC cold resistance (1.76 Ohms versus 1.2157 Ohms) compared to the original specification.

Bourns SinglFuse™ SF-2410FP016T-2 is a cross-manufacturer alternative with active product status and ROHS3 compliance. This part features cUL and UL approvals, higher melting I²t (0.0116), and lower DC cold resistance (0.8655 Ohms).

Frequently Asked Questions (FAQ)

Q: Can 0451.160MRL be used as a direct replacement for 0451.160MR?

A: Yes. Both parts share identical electrical ratings (160 mA, 125 V AC/DC, fast blow response), mechanical package (2-SMD square end block), and operating temperature range (-55°C ~ 125°C). The primary difference is product status: 0451.160MRL is active with ROHS3 compliance, while 0451.160MR is obsolete and RoHS non-compliant.

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

A: All three series meet the core electrical and mechanical requirements for this 160 mA application. Series 453 represents the manufacturer-recommended upgrade. Series 448 exhibits different thermal characteristics (lower melting I²t and higher DC cold resistance) but maintains equivalent breaking capacity and voltage ratings.

Q: Can the Bourns SF-2410FP016T-2 replace the Littelfuse 0451.160MR?

A: Yes. The Bourns part meets all core electrical and mechanical specifications. It differs in melting I²t (0.0116 versus 0.0048) and DC cold resistance (0.8655 Ohms versus 1.2157 Ohms). Both parts carry UL approvals and ROHS3 compliance.

Q: What does the packaging designation "MRL" versus "NRL" mean?

A: These designations indicate packaging format. Both are supplied in Tape & Reel (TR) format suitable for automated assembly. The letter suffix does not affect electrical or mechanical compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original 0451.160MR is RoHS non-compliant. For applications requiring RoHS compliance, any of the active substitute parts are suitable.

Q: What approval agencies certify these fuses?

A: Littelfuse parts carry CSA and UL approvals. The Bourns SF-2410FP016T-2 carries cUL and UL approvals. All parts meet the approval requirements for 125 V AC/DC applications.