SD253N/R Series 1 is a fast recovery diode produced by IRF company with high power and high voltage features.
The SD253N/R Series fast recovery diodes are high‑power devices with recovery times of 1.5 – 2.0 µs, voltage ratings up to 1600 V and average forward currents of 250 A. They are supplied in a stud version (JEDEC DO‑205AB) and feature low forward voltage and soft reverse recovery.
The document provides detailed electrical characteristics, thermal and mechanical data, dimensional outlines, and performance graphs for both S15 and S20 code variants. It also includes application notes such as snubber diode use for GTOs and high‑voltage free‑wheeling applications.
| Maximum average forward current (IF(AV)) | 250 A |
|---|---|
| Repetitive voltage rating (VRRM) | 400 – 1600 V |
| Recovery time (trr) | 1.5 – 2.0 µs |
| Junction‑to‑case thermal resistance (RthJC) | 0.115 K/W |
| Operating temperature range (Tj) | -40 °C to 125 °C |
The maximum RMS current is 392 A at a case temperature of 74 °C.
I2t is 143 kA·s at 50 Hz and 130 kA·s at 60 Hz.
The forward voltage drop is 1.38 V at a peak current of 785 A and a junction temperature of 25 °C.