Littelfuse 0469004.WR Surface Mount Fuse – Equivalent & Substitute Parts

Part Overview

The Littelfuse 0469004.WR is a 4A, 32VDC surface mount board fuse in 1206 (3216 Metric) package format with slow-blow response characteristics. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The part is designed for circuit protection in applications requiring board-level fuse integration with moderate current ratings and DC voltage tolerance.

Substiute Parts

0469004.WR

Littelfuse Inc.In Stock: 8830469004.WR Datasheet

Current PartRFQ

0407004.WR

Littelfuse Inc.In Stock: 64030407004.WR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0469004.WR is determined by strict equivalence across the following critical parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating (DC): 32 V (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Mounting Type: Surface Mount
• Package / Case: 1206 (3216 Metric)
• Response Time: Slow Blow
• Operating Temperature Range: -55°C ~ 150°C minimum
• RoHS Compliance: ROHS3 Compliant

The Littelfuse 0407004.WR meets all substitution criteria. While minor variations exist in breaking capacity, melting I²t, and DC cold resistance, these differences remain within acceptable tolerance for board-level fuse applications and do not compromise functional equivalence for the specified electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0407004.WR is the direct active equivalent for the obsolete 0469004.WR. Selection of the 0407004.WR is supported by:

• Identical electrical ratings (4A, 32VDC) and mechanical form factor (1206 package)
• Active product status ensuring long-term availability and supply chain continuity
• Full RoHS3 compliance and unlimited moisture sensitivity rating
• Equivalent operating temperature range (-55°C ~ 150°C)
• Regulatory approvals (cURus) suitable for circuit protection applications

The 0407004.WR is supplied in Tape & Reel (TR) packaging, which is standard for high-volume surface mount assembly operations. The lower DC cold resistance (0.025 Ohms vs. 0.052 Ohms) and slightly higher melting I²t (4.18 vs. 4.66) represent minor performance variations that do not affect functional compatibility in board-level fuse applications.

Frequently Asked Questions (FAQ)

Q: Can the 0407004.WR be used as a direct replacement for the 0469004.WR?

A: Yes. Both parts share identical current rating (4A), voltage rating (32VDC), package format (1206), mounting type (surface mount), and response time (slow blow). The 0407004.WR is the active equivalent.

Q: What is the difference in breaking capacity between these parts?

A: The 0469004.WR has a breaking capacity of 60A, while the 0407004.WR has 50A. Both exceed typical board-level fault current requirements and remain suitable for circuit protection in standard applications.

Q: Are there packaging differences between these parts?

A: The 0469004.WR packaging format is not specified in available data. The 0407004.WR is supplied in Tape & Reel (TR) format, which is standard for surface mount assembly. Confirm packaging requirements with your procurement process.

Q: Do both parts meet the same regulatory standards?

A: The 0469004.WR carries CSA and UL approvals. The 0407004.WR carries cURus approval. Both are ROHS3 compliant. Verify that cURus certification meets your application's regulatory requirements.

Q: Why is the 0469004.WR marked as obsolete?

A: Obsolescence typically reflects end-of-life status from the manufacturer. The 0407004.WR is the active replacement, ensuring continued design support and component availability.