Littelfuse 0476005.MRSN Surface Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0476005.MRSN is a 5 A, 250 V AC / 125 V DC surface mount board fuse in the NANO²®476 series. This fast-blow fuse is designed for board-level protection in SMD applications with a 2-SMD square end block package. The part maintains active product status with cURus approval and ROHS3 compliance. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and procurement optimization when the primary part number becomes unavailable or when alternative packaging configurations are required.

Substiute Parts

0476005.MRSN

Littelfuse Inc.In Stock: 10320476005.MRSN Datasheet

Current PartRFQ

0476005.MR

Littelfuse Inc.In Stock: 25280476005.MR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0476005.MRSN is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must match the following criteria:

• Current Rating: 5 A
• Voltage Rating - AC: 250 V
• Voltage Rating - DC: 125 V
• Response Time: Fast Blow
• Mounting Type: Surface Mount
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Package / Case: 2-SMD, Square End Block
• Breaking Capacity @ Rated Voltage: 100 A AC, 300 A DC
• DC Cold Resistance: 0.0157 Ohms
• Operating Temperature Range: -55°C ~ 125°C
• Size / Dimension: 0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm)
• Melting I²t: 4
• Approval Agency: cURus
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The identified substitute part maintains identical electrical performance, thermal characteristics, and mechanical compatibility with the primary part number.

Parameter Comparison

Engineering Selection Recommendations

Both the primary part number 0476005.MRSN and the substitute 0476005.MR are active products from Littelfuse Inc. with identical electrical specifications, mechanical dimensions, and regulatory compliance. Both parts carry cURus approval and maintain ROHS3 compliance status. The substitute part 0476005.MR is suitable for direct replacement in all applications where the 0476005.MRSN is specified. Selection between these part numbers may be based on procurement availability, lead time, or inventory considerations, as they are functionally and mechanically equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 0476005.MR be used as a direct replacement for the 0476005.MRSN?

A: Yes. Both parts are identical in electrical performance, mechanical dimensions, thermal characteristics, and regulatory compliance. They are direct substitutes within the NANO²®476 series.

Q: Are there any differences in the 2-SMD square end block package between these part numbers?

A: No. Both parts use the identical 2-SMD square end block package with dimensions of 0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm). PCB footprints and assembly processes are identical.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 0476005.MRSN and 0476005.MR carry cURus approval, maintain ROHS3 compliance, and are REACH unaffected. They are suitable for applications requiring these certifications.

Q: What is the difference between the MRSN and MR packaging designations?

A: Both part numbers are supplied in Tape & Reel (TR) packaging. The designations reflect internal Littelfuse product line organization but do not affect electrical or mechanical compatibility.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. Both parts are rated for 250 V AC and 125 V DC operation with a breaking capacity of 100 A AC and 300 A DC at rated voltage.