Littelfuse 0469008.WR Surface Mount Fuse – Equivalent & Substitute Parts

Part Overview

The Littelfuse 0469008.WR is an 8A, 24VDC surface mount fuse in 1206 (3216 Metric) package format, designed for board-level protection in low-voltage DC applications. This component features slow-blow response characteristics and is rated for 60A breaking capacity at rated voltage. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

0469008.WR

LittelfuseIn Stock: 64890469008.WR Datasheet

Current PartRFQ

0407008.WR

Littelfuse Inc.In Stock: 66800407008.WR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0469008.WR is determined by strict equivalence across the following critical parameters:

• Current Rating: 8 A (exact match required)
• Voltage Rating (DC): 24 V (exact match required)
• Fuse Type: Board Mount, Surface Mount configuration
• Package / Case: 1206 (3216 Metric) form factor
• Response Time: Slow Blow characteristic
• Breaking Capacity: 60 A minimum at rated voltage
• Approval Agencies: CSA, UL, or cURus certification

The substitute part 0407008.WR meets all critical electrical and mechanical parameters, with the primary distinction being its active product status and improved DC cold resistance specification.

Parameter Comparison

Engineering Selection Recommendations

The 0407008.WR is the direct functional equivalent for the obsolete 0469008.WR. Both components share identical electrical ratings (8A, 24VDC), mechanical form factor (1206 surface mount), and thermal operating range (-55°C to 150°C). The substitute part offers the advantage of active product status, ensuring continued availability and supply chain support.

The 0407008.WR features improved DC cold resistance (0.009 Ohms versus 0.017 Ohms), which reduces resistive heating in the circuit path. The melting I²t specification (24.12 versus 23.72) remains within acceptable tolerance for slow-blow fuse operation at the specified current rating.

Both parts maintain ROHS3 compliance and carry recognized safety certifications (CSA/UL for the original; cURus for the substitute). The substitute is supplied in Tape & Reel packaging, standard for automated assembly processes, whereas the original was supplied in bulk format.

Frequently Asked Questions (FAQ)

Q: Can the 0407008.WR be used as a direct replacement for the 0469008.WR in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: 8A current rating, 24VDC voltage rating, slow-blow response, 1206 package format, and 60A breaking capacity. The substitute is suitable for both new production and field replacement applications.

Q: What is the significance of the difference in DC cold resistance between the two parts?

A: The 0407008.WR exhibits lower DC cold resistance (0.009 Ohms versus 0.017 Ohms). This represents improved electrical efficiency and reduced resistive heating in the circuit. This difference does not affect fuse operation or protection characteristics at the specified 8A rating.

Q: Are there packaging considerations when switching from 0469008.WR to 0407008.WR?

A: Yes. The original part was supplied in bulk packaging, while the substitute is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated pick-and-place assembly and is the standard format for surface mount components in modern manufacturing environments.

Q: Do both parts carry the same safety certifications?

A: Both parts carry recognized safety certifications. The 0469008.WR is certified by CSA and UL. The 0407008.WR carries cURus certification. All certifications are appropriate for 24VDC fuse applications and meet industry safety standards.

Q: Why is the 0469008.WR classified as obsolete?

A: The 0469008.WR has been superseded by the 0407008.WR in the Littelfuse product portfolio. The substitute part offers equivalent functionality with improved specifications and active manufacturing status, making it the recommended choice for all applications.