1N4148W-HE3-08 High-Speed Switching Diode - Datasheet, Features & Applications
1N4148W-HE3-08: The Ultimate Guide to This High-Speed Switching Diode
The 1N4148W-HE3-08 from General Semiconductor (now part of Vishay) represents the gold standard in general-purpose switching diodes, combining exceptional speed with reliable performance. This comprehensive guide explores every technical aspect of this industry-favorite component.
In-Depth Product Analysis
Manufacturer & Product Lineage
- Manufacturer History: Originally produced by General Semiconductor's Diodes Division, now manufactured under Vishay's quality standards
- Industry Recognition: Certified for industrial, automotive, and consumer applications
- Alternative Part Numbers: Compatible with 1N4148WS, 1N4148W-TP, and other SOD-123 packaged variants
Detailed Technical Specifications
Electrical Characteristics
| Parameter | Value | Conditions |
|---|---|---|
| Peak Reverse Voltage | 75V | Absolute Maximum |
| Average Forward Current | 150mA | Continuous operation |
| Surge Current | 500mA | 8.3ms single half-sine-wave |
| Forward Voltage Drop | 1V typical (1.2V max) | @ 10mA |
| Junction Capacitance | 4pF typical | VR = 0V, f = 1MHz |
Performance Advantages
- Ultra-Fast Switching: 4ns reverse recovery time enables operation in RF circuits up to 100MHz
- Thermal Stability: Low leakage current (5nA typical @ 20V) across temperature range
- Efficiency: Low forward voltage reduces power dissipation by up to 30% compared to standard diodes
Advanced Package Information
SOD-123 Package Dimensions
- Body Length: 2.65mm 0.10mm
- Body Width: 1.70mm 0.10mm
- Height: 1.30mm 0.10mm
- Lead Pitch: 1.90mm nominal
The moisture-sensitive Level 1 package meets J-STD-020 standards, making it suitable for lead-free soldering processes.
Comprehensive Application Guide
Primary Use Cases
- High-Speed Switching: Ideal for TTL and CMOS logic circuits
- Protection Circuits: Effective as transient voltage suppressors
- RF Applications: Suitable for detector and mixer circuits up to VHF range
Design Considerations
- For optimal high-frequency performance, minimize trace lengths
- When used in parallel for higher current, include balancing resistors
- For thermal management in continuous operation, maintain < 100 C junction temperature
Comparative Analysis
When benchmarked against similar diodes like the 1N914 or BAS16, the 1N4148W-HE3-08 offers:
- 15% faster recovery time than standard 1N4148 variants
- Better thermal characteristics than smaller SOD-323 packages
- Superior current handling compared to ultra-miniature packages
Reliability & Compliance
- RoHS compliant (2011/65/EU)
- Halogen-free according to IEC 61249-2-21
- ESD protection: HBM Class 2 (> 2kV)
- MSL Rating: Level 1 (Unlimited floor life)
Purchasing Information
Available through authorized distributors with the following options:
- Standard packaging: 3,000 pieces per reel
- Sample quantities available
- Custom tape-and-reel options for automated assembly
For engineers designing high-speed digital circuits, RF systems, or precision analog applications, the 1N4148W-HE3-08 delivers unmatched performance in its class. Its combination of speed, reliability, and compact packaging makes it the first choice for modern electronic designs.