DF451 is a fast recovery diode from dynexsemi. It features double-sided cooling, high surge capability, and low recovery charge, and is used in induction heating, AC motor drives, inverters and choppers, welding, high-frequency rectification, and UPS.
The DF451 fast recovery diode from Dynex is designed for high‑surge applications such as induction heating, motor drives, inverters, welding, UPS and high‑frequency rectification. It offers double‑side cooling, low recovery charge and high surge capability.
Key parameters include a reverse voltage up to 1600 V, forward voltage of 2.65 V at 600 A peak, reverse recovery time of 1.22 µs, and a maximum non‑repetitive surge current of 3.5 kA. The device is supplied in a M771 package with thermal resistance as low as 0.07 °C/W and a clamping force of 5 kN. Ordering requires the full part number (e.g., DF451 12).
| Reverse Voltage (DF451 12) | 1200 V |
|---|---|
| Reverse Recovery Time | 1.22 µs |
| Surge Forward Current (non‑repetitive, 10 ms half sine) | 3.5 kA |
| Clamping Force (double side) | 5.0 kN |
| Storage Temperature Range | -55 °C to 150 °C |
The DF451 uses the M771 package outline type code.
It is suitable for induction heating, AC motor drives, inverters, choppers, welding, high‑frequency rectification and UPS.
The diode can handle a non‑repetitive surge forward current of 3.5 kA for a 10 ms half‑sine pulse.