Littelfuse 0447004.YP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0447004.YP is a 4 A board mount radial fuse rated for 350 V AC and 125 V DC operation. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The part features fast-blow response characteristics and is approved by CSA, METI, and UL standards. Identifying compatible alternatives ensures design continuity and supply chain reliability.

Substiute Parts

0447004.YP

Littelfuse Inc.In Stock: 7520447004.YP Datasheet

Current PartRFQ

0447004.YXP

Littelfuse Inc.In Stock: 11230447004.YXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0447004.YP is determined by strict equivalence across electrical and mechanical parameters. The primary substitute, Littelfuse 0447004.YXP, qualifies as a direct equivalent based on the following criteria:

• Identical current rating: 4 A
• Identical voltage ratings: 350 V AC, 125 V DC
• Identical fuse type and mounting configuration: Board Mount, Through Hole
• Identical response time: Fast Blow
• Identical package dimensions and form factor: Radial, Box (0.430" L x 0.150" W x 0.404" H)
• Identical breaking capacity: 100 A AC, 50 A DC
• Identical melting I²t value: 17
• Identical DC cold resistance: 0.024 Ohms
• Identical operating temperature range: -40°C ~ 125°C
• Identical approval certifications: CSA, METI, UL
• Identical RoHS compliance: ROHS3 Compliant

The 0447004.YXP differs only in product status (Active vs. Obsolete) and packaging format (Bulk vs. Box), neither of which affects electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0447004.YXP is the direct equivalent for the obsolete 0447004.YP. Both parts maintain identical electrical specifications, mechanical dimensions, and regulatory certifications. The 0447004.YXP carries Active product status, ensuring long-term availability and supply chain continuity. Both parts satisfy CSA, METI, and UL approval requirements and maintain ROHS3 compliance. Selection between these parts depends solely on packaging requirements: Box packaging for the original part versus Bulk packaging for the substitute.

Frequently Asked Questions (FAQ)

Q: Can the 0447004.YXP be used as a direct replacement for the 0447004.YP in existing designs?

A: Yes. The 0447004.YXP is electrically and mechanically identical to the 0447004.YP. All electrical parameters, physical dimensions, and regulatory certifications are equivalent. The only differences are product status and packaging format.

Q: What is the difference between Box and Bulk packaging for these fuses?

A: Box packaging typically refers to individual or small quantity packaging with protective enclosure, while Bulk packaging refers to larger quantity shipments without individual protective cases. Both packaging formats contain identical components with identical electrical and mechanical specifications.

Q: Are both parts suitable for the same circuit protection applications?

A: Yes. Both the 0447004.YP and 0447004.YXP are rated for 4 A protection at 350 V AC and 125 V DC with identical fast-blow response characteristics. They are suitable for identical applications within the specified voltage and current parameters.

Q: What certifications apply to both parts?

A: Both parts carry CSA, METI, and UL approvals and are ROHS3 compliant. Both maintain identical operating temperature ranges of -40°C to 125°C.

Q: Why is the 0447004.YP listed as obsolete?

A: Product status reflects manufacturer lifecycle decisions. The 0447004.YXP, with Active status, is the current production equivalent and is the recommended selection for new designs and ongoing supply requirements.