SF4001/2/3/4/5/6/7 is a high performance glass-encapsulated ultra fast avalanche diode from Vishay Semiconductors. This product features low reverse current, high reverse voltage, lead-free, and is suitable for switched mode power supplies and high-frequency inverter circuits.
The SF4001‑SF4007 family of ultra‑fast avalanche sintered‑glass diodes from Vishay provides a range of reverse voltage ratings from 50 V to 1000 V while maintaining low reverse current and fast recovery times. Features include glass‑passivated, hermetically sealed axial leads, lead‑free construction, and RoHS compliance.
These diodes are intended for switched‑mode power supplies, high‑frequency inverter circuits, and other applications requiring high reverse voltage and fast switching. The datasheet lists mechanical data, absolute maximum ratings, electrical characteristics, and typical performance curves for each part number.
| Forward voltage at 1 A | 1 V (SF4001) – 17 V (SF4005) |
|---|---|
| Reverse current (typical) | 5 pA (SF4001) – 50 pA (SF4004) |
| Peak forward surge current | 30 A (10 ms half‑sine) |
| Weight | ≈ 369 mg |
| Case type | SOD‑57 sintered glass |
| Junction temperature range | -55 °C to +175 °C |
The SF4004 diode is rated for a reverse voltage of 400 V.
At 1 A forward current, the SF4001 diode has a forward voltage of about 1 V.
Yes, the diodes are lead‑free and comply with RoHS 2002/95/EC.
The diodes can handle a peak forward surge current of 30 A for a 10 ms half‑sine pulse.