Littelfuse 0451.062MRL Surface Mount Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0451.062MRL is a 62 mA, 125 V AC/DC surface mount board mount fuse in the NANO²® 451 series. This fast-blow fuse is designed for circuit protection in applications requiring compact SMD packaging with 2-SMD square end block configuration. The part is active in production status with full CSA and UL approval certifications. Equivalent and substitute parts are identified when identical electrical parameters and mechanical compatibility are maintained across the specified voltage, current, and response time ratings.

Substiute Parts

0451.062MRL

Littelfuse Inc.In Stock: 189440451.062MRL Datasheet

Current PartRFQ

0448.062MR

Littelfuse Inc.In Stock: 24520448.062MR Datasheet

Parametric EquivalentRFQ

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 0451.062MRL 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 ~ 125°C (exact match required)
• Regulatory Compliance: CSA and/or UL approval (required)

Substitute parts are grouped into two categories: Parametric Equivalents (same manufacturer, different series) and Direct Manufacturer Equivalents (alternative manufacturers). All listed substitutes maintain identical electrical and mechanical specifications within the constraints of this product category.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and meet required regulatory certifications (CSA, UL, or cUL). Selection between the 0451.062MRL and its substitutes should be based on packaging availability and supply chain requirements:

• Littelfuse 0451.062MRL: Available in Cut Tape (CT) & Digi-Reel® packaging. Suitable for applications requiring specific packaging formats.
• Littelfuse 0448.062MR and 0453.062MR: Available in Tape & Reel (TR) packaging. Interchangeable with the primary part for high-volume automated assembly processes.
• Bourns SF-2410FP0062T-2: Available in Tape & Reel (TR) packaging. Cross-manufacturer substitute with identical electrical and mechanical specifications. Approved under cUL and UL standards.

All parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can the 0448.062MR or 0453.062MR be used as direct replacements for the 0451.062MRL?

A: Yes. All three Littelfuse parts share identical electrical parameters (62 mA, 125 V AC/DC, fast-blow response) and mechanical specifications (2-SMD square end block package). The primary difference is packaging format: the 0451.062MRL uses Cut Tape & Digi-Reel®, while the 0448.062MR and 0453.062MR use Tape & Reel. Selection depends on assembly equipment compatibility and supply chain availability.

Q: Is the Bourns SF-2410FP0062T-2 a suitable cross-manufacturer substitute?

A: Yes. The SF-2410FP0062T-2 meets all critical electrical and mechanical requirements: 62 mA current rating, 125 V AC/DC voltage rating, fast-blow response, and 2-SMD square end block package. It carries cUL and UL approvals. The part is functionally equivalent for circuit protection applications.

Q: What are the key differences between these substitute parts?

A: Electrical and mechanical specifications are identical across all parts. Differences exist only in packaging format (Cut Tape vs. Tape & Reel), manufacturer series designation (NANO²® 451, 448, 453 vs. SingleFuse™ SF-2410FP-T), and minor variations in DC cold resistance and melting I²t values. These variations do not affect functional performance in the specified application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts carry ROHS3 compliance certification and are REACH unaffected. All parts have MSL 1 (Unlimited) moisture sensitivity rating, requiring no special environmental controls during storage or assembly.

Q: What is the breaking capacity specification, and why is it important?

A: All parts have a breaking capacity of 50 A at rated voltage. This specification defines the maximum current the fuse can safely interrupt without damage or hazard. This value is identical across all substitutes and is suitable for the specified 62 mA application.