Littelfuse 0447010.Y Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0447010.Y is a 10 A, 350 V AC / 125 V DC board mount fuse with fast blow response characteristics, designed for through-hole radial mounting in electronic assemblies. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

The primary reason for identifying substitute parts is the obsolete product status of the 0447010.Y, which limits availability through standard distribution channels and may impact long-term supply chain reliability for new production runs or field replacements.

Substiute Parts

0447010.Y

Littelfuse Inc.In Stock: 6860447010.Y Datasheet

Current PartRFQ

0447010.YXP

Littelfuse Inc.In Stock: 8630447010.YXP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0447010.Y is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must match:

• Current rating: 10 A
• Voltage ratings: 350 V AC and 125 V DC
• Response time: Fast Blow
• Mounting configuration: Through Hole, Radial, Box package
• Physical dimensions: 0.430" L x 0.150" W x 0.404" H
• Breaking capacity: 100 A AC, 50 A DC
• Melting I²t: 93
• Thermal operating range: -40°C ~ 125°C
• Regulatory approvals: CSA, UL

The Littelfuse 0447010.YXP meets all these criteria and is classified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The 0447010.YXP is the direct functional equivalent of the 0447010.Y and is designated as the manufacturer-recommended substitute. Both parts are manufactured by Littelfuse Inc. and maintain identical electrical and mechanical specifications across all critical parameters.

The primary distinction between the two parts is product status and regulatory compliance. The 0447010.Y is obsolete, while the 0447010.YXP maintains active production status. Additionally, the 0447010.YXP achieves ROHS3 compliance, whereas the 0447010.Y is RoHS non-compliant. Both parts carry CSA and UL approvals.

For new designs, procurement of replacement stock, or field service applications, the 0447010.YXP is the appropriate selection due to its active availability and enhanced regulatory compliance posture.

Frequently Asked Questions (FAQ)

Q: Can the 0447010.YXP be used as a direct replacement for the 0447010.Y in existing assemblies?

A: Yes. The 0447010.YXP is electrically and mechanically identical to the 0447010.Y across all specified parameters, including current rating, voltage ratings, response time, physical dimensions, and thermal operating range. No circuit modifications or board redesign are required.

Q: What is the difference between the 0447010.Y and 0447010.YXP?

A: The parts are functionally equivalent. The primary differences are product status (0447010.Y is obsolete; 0447010.YXP is active) and RoHS compliance (0447010.Y is non-compliant; 0447010.YXP is ROHS3 compliant). Packaging differs (0447010.Y is box; 0447010.YXP is bulk).

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts operate across the same temperature range (-40°C ~ 125°C), maintain identical DC cold resistance (0.0073 Ohms), and exhibit the same melting I²t value (93).

Q: Does the packaging difference affect compatibility?

A: No. Packaging format (box versus bulk) does not affect electrical or mechanical compatibility. The fuse element and physical form factor remain identical.

Q: What certifications apply to both parts?

A: Both the 0447010.Y and 0447010.YXP carry CSA and UL approvals, confirming compliance with recognized safety standards for board mount fuses.