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Littelfuse 0469005.WR Surface Mount Fuse – Equivalent & Substitute Parts
Part Overview
The Littelfuse 0469005.WR is a 5A, 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 applications requiring overcurrent protection in low-voltage DC circuits with moderate current demands.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 0469005.WR |
| Manufacturer | Littelfuse |
| Current Rating | 5 A |
| Voltage Rating (DC) | 32 V |
| Fuse Type | Board Mount (Cartridge Style Excluded) |
| Response Time | Slow Blow |
| Package / Case | 1206 (3216 Metric) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the 0469005.WR is determined by the following critical parameters:
- Current Rating: Must be 5 A
- Voltage Rating (DC): Must be 32 V or higher
- Package / Case: Must be 1206 (3216 Metric)
- Mounting Type: Must be Surface Mount
- Fuse Type: Must be Board Mount (Cartridge Style Excluded)
- Response Time: Must be Slow Blow
The Littelfuse 0407005.WR meets all substitution criteria. Both parts share identical current, voltage, package, mounting, and response characteristics. The primary distinction is product status: 0407005.WR is active and currently in production, whereas 0469005.WR is obsolete.
Parameter Comparison
| Parameter | 0469005.WR (Main Part) | 0407005.WR (Substitute) |
|---|---|---|
| Manufacturer | Littelfuse | Littelfuse Inc. |
| Current Rating (Amps) | 5 A | 5 A |
| Voltage Rating - DC | 32 V | 32 V |
| Response Time | Slow Blow | Slow Blow |
| Package / Case | 1206 (3216 Metric) | 1206 (3216 Metric) |
| Mounting Type | Surface Mount | Surface Mount |
| Fuse Type | Board Mount (Cartridge Style Excluded) | Board Mount (Cartridge Style Excluded) |
| Operating Temperature Range | -55°C ~ 150°C | -55°C ~ 150°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active |
| Approval Agency | CSA, UL | cURus |
| Breaking Capacity @ Rated Voltage | 60 A | 50 A |
| Melting I²t | 5.62 | 7.8 |
| DC Cold Resistance | 0.035 Ohms | 0.016 Ohms |
| Size / Dimension | 0.129" L x 0.064" W x 0.035" H (3.27mm x 1.63mm x 0.90mm) | 0.126" L x 0.064" W x 0.033" H (3.20mm x 1.63mm x 0.84mm) |
Engineering Selection Recommendations
The Littelfuse 0407005.WR is the direct substitute for the obsolete 0469005.WR. Both components satisfy identical electrical and mechanical requirements for 5A, 32VDC slow-blow fuse applications in 1206 surface mount packages.
The 0407005.WR is recommended for new designs and procurement due to its active product status and current manufacturing availability. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental standards.
Approval certifications differ between the two parts: the original 0469005.WR carries CSA and UL approvals, while the 0407005.WR carries cURus certification. Application-specific regulatory requirements should be verified against the intended end-use market.
Minor variations in breaking capacity (60A vs. 50A), melting I²t (5.62 vs. 7.8), and DC cold resistance (0.035 Ohms vs. 0.016 Ohms) reflect manufacturing improvements in the active series. These differences do not affect functional compatibility in standard overcurrent protection applications operating within rated parameters.
Frequently Asked Questions (FAQ)
Q: Can the 0407005.WR be used as a direct replacement for the 0469005.WR?
A: Yes. Both parts share identical current rating (5A), voltage rating (32VDC), package format (1206), mounting type (surface mount), and response time (slow blow). The 0407005.WR is the active equivalent.
Q: What is the primary reason for substitution?
A: The 0469005.WR is obsolete. The 0407005.WR is the current production equivalent from Littelfuse, ensuring long-term availability and supply chain continuity.
Q: Are there differences in physical dimensions between these parts?
A: Minor dimensional variations exist. The 0469005.WR measures 0.129" L x 0.064" W x 0.035" H, while the 0407005.WR measures 0.126" L x 0.064" W x 0.033" H. Both conform to the 1206 (3216 Metric) package specification and are compatible with standard surface mount assembly processes.
Q: Do the approval certifications differ?
A: Yes. The 0469005.WR carries CSA and UL approvals; the 0407005.WR carries cURus certification. Verify that the substitute part's certifications meet your application's regulatory requirements.
Q: What is the difference in breaking capacity between these parts?
A: The 0469005.WR has a breaking capacity of 60A at rated voltage, while the 0407005.WR has 50A. Both exceed typical application requirements for 5A fuses and do not affect functional compatibility in standard circuits.
Q: Are both parts RoHS compliant?
A: Yes. Both the 0469005.WR and 0407005.WR are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).
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