Littelfuse 047104.6NRT1 Equivalent & Substitute Parts

Part Overview

The Littelfuse 047104.6NRT1 is a 4.6 A, 125 V AC/DC board mount axial fuse designed for through-hole applications in the PICO® II 471 series. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without redesign.

Substiute Parts

047103.5NRT1

Littelfuse Inc.In Stock: 992047103.5NRT1 Datasheet

Current PartRFQ

047103.5NRT1L

Littelfuse Inc.In Stock: 1139047103.5NRT1L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 047104.6NRT1 is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be exactly 4.6 A
• Voltage Rating: Must support 125 V AC and 125 V DC minimum
• Fuse Type & Mounting: Must be board mount through-hole axial configuration
• Response Time: Must be slow blow characteristic
• Physical Dimensions: Must match 0.110" Dia x 0.280" L (2.80mm x 7.11mm)
• Temperature Range: Must support -55°C ~ 125°C operation
• Approval Certifications: Must maintain PSE and UR approvals

The 047104.6NRT1L qualifies as a direct substitute based on complete parameter alignment across all electrical and mechanical specifications. The primary distinction is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The 047104.6NRT1L is the direct functional equivalent for the obsolete 047104.6NRT1. Both parts are manufactured by Littelfuse within the same PICO® II 471 series and maintain identical electrical and mechanical specifications.

Key Selection Factors:

• Product Status: The 047104.6NRT1L carries active product status, ensuring continued availability and manufacturing support, whereas the main part is obsolete.
• Regulatory Compliance: The 047104.6NRT1L achieves ROHS3 compliance and REACH unaffected status, providing enhanced environmental and regulatory alignment for new designs and ongoing production.
• Packaging Consideration: The substitute is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The main part was supplied in bulk packaging.
• Certification Maintenance: Both parts retain PSE and UR approvals, maintaining circuit protection standards across all applications.

For new designs or production transitions, the 047104.6NRT1L is the recommended selection. For legacy system support requiring the original bulk packaging format, alternative sourcing channels may be necessary.

Frequently Asked Questions (FAQ)

Q: Can the 047104.6NRT1L be used as a direct replacement for the 047104.6NRT1 in existing designs?

A: Yes. The 047104.6NRT1L is electrically and mechanically identical to the 047104.6NRT1. Both parts share the same current rating (4.6 A), voltage ratings (125 V AC/DC), response time (slow blow), physical dimensions (0.110" Dia x 0.280" L), and approval certifications (PSE, UR). No circuit redesign is required.

Q: What is the difference between these two part numbers?

A: The primary differences are product status, packaging format, and RoHS compliance. The 047104.6NRT1L is an active product supplied in Tape & Reel format with ROHS3 compliance, while the 047104.6NRT1 is obsolete and was supplied in bulk packaging as a non-compliant part.

Q: Are there any compatibility concerns with the Tape & Reel packaging of the 047104.6NRT1L?

A: No. Tape & Reel packaging is standard for automated assembly and does not affect component performance. The fuse itself is identical in all functional and physical parameters. Manual assembly processes can also accommodate this packaging format.

Q: Do both parts maintain the same approval certifications?

A: Yes. Both the 047104.6NRT1 and 047104.6NRT1L carry PSE and UR approvals, ensuring compliance with circuit protection standards across all intended applications.

Q: Why is the 047104.6NRT1 classified as obsolete?

A: Obsolescence typically reflects manufacturer discontinuation of a product line or transition to improved variants. The 047104.6NRT1L represents the active continuation within the PICO® II 471 series with enhanced regulatory compliance.

Q: Can the 047104.6NRT1L be used in applications requiring the original part's bulk packaging?

A: The 047104.6NRT1L is functionally equivalent but supplied in Tape & Reel format. If bulk packaging is a specific procurement requirement, alternative sourcing or packaging conversion services may be necessary.