Littelfuse 0448.062MR Surface Mount Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0448.062MR is a 62 mA, 125 V AC/DC surface mount board mount fuse in the NANO²® 448 series. This fast-blow fuse is designed for circuit protection in applications requiring compact, high-density mounting on printed circuit boards. The part is actively manufactured and widely stocked, with 2400 units available in inventory. Equivalent and substitute parts are identified for applications where design flexibility, supply chain optimization, or specific performance characteristics require alternative component selection.

Substiute Parts

0448.062MR

Littelfuse Inc.In Stock: 24520448.062MR Datasheet

Current PartRFQ

0453.062MR

Littelfuse Inc.In Stock: 21280453.062MR Datasheet

Parametric EquivalentRFQ

SF-2410FP0062T-2

Bourns Inc.In Stock: 1148SF-2410FP0062T-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0448.062MR is determined by strict equivalence across the following critical parameters:

• Current Rating: 62 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 to 125°C (exact match required)
• Regulatory Compliance: CSA and/or UL approval (required)

Two substitute parts meet these criteria: the Littelfuse 0453.062MR (parametric equivalent within the same manufacturer) and the Bourns SF-2410FP0062T-2 (direct cross-manufacturer equivalent). Both parts satisfy all electrical and mechanical requirements for direct substitution in applications designed for the 0448.062MR.

Parameter Comparison

Engineering Selection Recommendations

All three parts—0448.062MR, 0453.062MR, and SF-2410FP0062T-2—are active products with full regulatory compliance (UL and CSA certifications). Selection between these parts should be based on:

• Supply chain availability and lead time requirements
• Inventory levels at component distributors
• Cost considerations across equivalent specifications
• Manufacturer preference or qualification requirements in existing designs
• Dimensional tolerances within the specified package envelope

The Littelfuse 0448.062MR and 0453.062MR are both from the same manufacturer and differ only in series designation (NANO²® 448 versus NANO²® 453) and minor variations in melting I²t characteristics (0.00023 versus 0.00019). The Bourns SF-2410FP0062T-2 provides a cross-manufacturer alternative with identical electrical ratings and regulatory approvals, with minor dimensional variation in width and height (0.102" versus 0.106").

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0453.062MR be used as a direct replacement for the 0448.062MR?

A: Yes. Both parts share identical electrical ratings (62 mA, 125 V AC/DC), response time (fast blow), mounting type (surface mount), package configuration (2-SMD, square end block), breaking capacity (50 A), operating temperature range (-55°C to 125°C), and regulatory approvals (CSA, UL). The difference in series designation (NANO²® 448 versus NANO²® 453) does not affect functional compatibility.

Q: What are the key differences between the Littelfuse and Bourns alternatives?

A: The Bourns SF-2410FP0062T-2 maintains all critical electrical specifications but has minor dimensional variations: width and height are 0.102" and 0.102" respectively, compared to 0.106" and 0.106" for the Littelfuse parts. DC cold resistance is 6.653 Ohms (Bourns) versus 5.5 Ohms (Littelfuse). Melting I²t is 0.0012 (Bourns) versus 0.00023 and 0.00019 (Littelfuse 448 and 453). Regulatory approvals include cUL for the Bourns part.

Q: Are there any compatibility concerns with PCB footprints?

A: The package designation (2-SMD, square end block) is identical across all three parts. However, the minor dimensional differences in the Bourns part (0.102" versus 0.106" width and height) should be verified against PCB pad layouts and solder mask openings to ensure proper fit and solder joint formation.

Q: Which part should be selected for new designs?

A: Selection should be based on supply chain strategy, cost analysis, and manufacturer qualification requirements. All three parts meet identical electrical and regulatory requirements. Littelfuse parts offer higher inventory availability (2400 and 2087 units respectively), while the Bourns alternative provides cross-manufacturer sourcing flexibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three parts—0448.062MR, 0453.062MR, and SF-2410FP0062T-2—are ROHS3 compliant with moisture sensitivity level 1 (unlimited) and REACH unaffected status.