BYG21 is a fast silicon Mesa SMD rectifier with glass passivated junction, low reverse current, soft recovery characteristics, fast reverse recovery time, and good switching characteristics. It is suitable for surface mounting fast rectifiers, freewheeling diodes in SMPS and converters, and snubber diodes.
The BYG21 is a fast silicon mesa SMD rectifier designed for surface‑mount applications such as free‑wheeling diodes in SMPS, snubber diodes, and other high‑speed switching circuits. It features a glass‑passivated junction, low reverse current, soft recovery, fast reverse recovery time, and is compatible with wave and reflow soldering processes.
The document lists absolute maximum ratings, detailed electrical characteristics (forward voltage, reverse current, recovery time), thermal resistance values for various mounting methods, and mechanical dimensions of the JEDEC DO‑214 package. An ozone‑depleting substances policy statement confirms the product contains no ODS.
| Reverse voltage (VRRM) | 800 V |
|---|---|
| Repetitive peak reverse voltage (VARM) | 1000 V |
| Peak forward surge current (If(surge)) | 30 A |
| Average forward current (IFAV) | 1.5 A |
| Junction temperature range | -95 °C to +150 °C |
| Junction‑to‑ambient thermal resistance (RθJA) | 25 K/W |
| Forward voltage at 1 A (VF) | 1.5 V |
| Reverse current at 25 °C | 1 pA |
| Reverse recovery time (trr) | 120 ns |
| Package dimensions (mm) | 5.34 × 2.15 × 0.15 |
The BYG21 is rated for a reverse voltage of 800 V (repetitive peak reverse voltage 1000 V).
The average forward current is specified as 1.5 A.
The package measures approximately 5.34 mm × 2.15 mm × 0.15 mm.
No, Vishay certifies that the BYG21 does not contain ozone‑depleting substances.