Littelfuse 0476008.MRSN Surface Mount Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0476008.MRSN is an 8A 125VAC/VDC surface mount board mount fuse in the NANO²®476 series. This fast-blow fuse is designed for circuit protection in applications requiring 2-SMD, square end block packaging. The part is active and widely available with 874 pieces in current inventory. Substitute parts are identified to provide design flexibility, alternative sourcing options, and compatibility with different packaging requirements while maintaining equivalent electrical performance.

Key Parameters

Parameter	Value
Current Rating	8 A
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Response Time	Fast Blow
Mounting Type	Surface Mount
Package / Case	2-SMD, Square End Block
Operating Temperature Range	-55°C to 125°C
Size / Dimension	0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the 0476008.MRSN are qualified based on the following electrical and mechanical parameters:

Current Rating: 8 A (exact match required)
Voltage Rating: 125 V AC / 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)
Operating Temperature Range: -55°C to 125°C (exact match required)
Physical Dimensions: 0.240" L x 0.106" W x 0.106" H (exact match required)
RoHS Compliance: ROHS3 Compliant (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in Breaking Capacity, Melting I²t, DC Cold Resistance, and packaging format (Tape & Reel vs. Cut Tape) do not affect functional substitution within the specified parameter set.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage AC	Voltage DC	Response Time	Mounting Type	Package / Case	Operating Temperature	Size (mm)	RoHS Status	Product Status	Packaging Format	Inventory
0476008.MRSN	Littelfuse Inc.	NANO²®476	8 A	125 V	125 V	Fast Blow	Surface Mount	2-SMD, Square End Block	-55°C ~ 125°C	6.10 x 2.69 x 2.69	ROHS3 Compliant	Active	Tape & Reel (TR)	874 Pcs
0448008.MR	Littelfuse Inc.	NANO²®448	8 A	125 V	125 V	Fast Blow	Surface Mount	2-SMD, Square End Block	-55°C ~ 125°C	6.10 x 2.69 x 2.69	ROHS3 Compliant	Active	Tape & Reel (TR)	2200 Pcs
0451008.MRL	Littelfuse Inc.	NANO²®451	8 A	125 V	125 V	Fast Blow	Surface Mount	2-SMD, Square End Block	-55°C ~ 125°C	6.10 x 2.69 x 2.69	ROHS3 Compliant	Active	Cut Tape (CT) & Digi-Reel®	60400 Pcs
0451008.MRSN	Littelfuse Inc.	NANO²®451	8 A	125 V	125 V	Fast Blow	Surface Mount	2-SMD, Square End Block	-55°C ~ 125°C	6.10 x 2.69 x 2.69	ROHS3 Compliant	Active	Tape & Reel (TR)	1838 Pcs
0453008.MR	Littelfuse Inc.	NANO²®453	8 A	125 V	125 V	Fast Blow	Surface Mount	2-SMD, Square End Block	-55°C ~ 125°C	6.10 x 2.69 x 2.69	ROHS3 Compliant	Active	Tape & Reel (TR)	10985 Pcs

Engineering Selection Recommendations

All listed substitute parts are active products from Littelfuse Inc. and maintain full compliance with ROHS3 requirements. Selection among these equivalents should be based on:

Packaging Format Availability: The 0451008.MRL is available in Cut Tape (CT) & Digi-Reel® format, while 0476008.MRSN, 0448008.MR, 0451008.MRSN, and 0453008.MR are supplied in Tape & Reel (TR) format. Choose based on assembly line requirements and minimum order quantities.

Inventory Availability: The 0451008.MRL offers the highest current inventory at 60400 pieces, followed by 0453008.MR at 10985 pieces. The 0448008.MR provides 2200 pieces, while 0451008.MRSN and 0476008.MRSN offer 1838 and 874 pieces respectively.

Regulatory Certifications: All parts carry CSA, PSE, and UL certifications. The 0451008.MRSN includes METI and UR certifications in addition to CSA and PSE. The 0476008.MRSN carries cURus certification. Select based on specific regional compliance requirements.

Series Designation: Parts are available across NANO²®476, NANO²®448, and NANO²®451 series. All maintain identical electrical and mechanical specifications within the substitution criteria.

Frequently Asked Questions (FAQ)

Q: Can the 0451008.MRL be used as a direct replacement for the 0476008.MRSN?

A: Yes. Both parts meet all core electrical and mechanical parameters: 8A current rating, 125V AC/DC voltage rating, fast-blow response, surface mount configuration, 2-SMD square end block package, and identical physical dimensions. The primary difference is packaging format: 0451008.MRL uses Cut Tape & Digi-Reel® while 0476008.MRSN uses Tape & Reel.

Q: What is the significance of the different series designations (476, 448, 451, 453)?

A: Series designations identify different product lines within the NANO²® family. Within the substitution criteria specified, series differences do not affect functional compatibility. All listed parts maintain identical electrical performance and physical form factor.

Q: Are there differences in breaking capacity between substitute parts?

A: Yes. The 0476008.MRSN specifies 100A AC and 300A DC breaking capacity, while substitute parts specify 50A breaking capacity. However, breaking capacity is not included in the core substitution parameters. Verify breaking capacity requirements for your specific application before selection.

Q: Does DC Cold Resistance variation affect substitution?

A: DC Cold Resistance values vary slightly among substitute parts (ranging from 0.0077 to 0.0112 Ohms). This parameter is not included in the core substitution criteria. If DC cold resistance is critical to your application, verify the specific value required before component selection.

Q: What packaging format should I select?

A: Choose based on your assembly process requirements. Tape & Reel (TR) format is standard for automated pick-and-place equipment. Cut Tape (CT) & Digi-Reel® format offers flexibility for lower-volume applications or mixed component sourcing. Both formats contain identical components.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed parts are ROHS3 compliant and carry REACH Unaffected status, meeting current environmental and regulatory requirements.

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