The SMAJ series are TRANSILTM diodes designed specifically for protecting sensitive equipment against transient overvoltages. The SMA package allows save spacing on high density printed circuit boards. Transil diodes provide high overvoltage protection by clamping action. Their instantaneous response to transient overvoltages makes them particularly suited to protect voltage sensitive devices such as MOS Technology and low voltage supplied IC’s.
The SMAJ TRANSIL™ series are transient voltage suppressor (TRANSIL) diodes designed to protect sensitive equipment from over‑voltage spikes. They are offered in a compact SMA (JEDEC DO‑214AC) surface‑mount package, suitable for high‑density printed‑circuit‑board layouts. Both unidirectional and bidirectional versions are available, featuring low clamping factor and fast response time.
The document provides electrical characteristics, absolute maximum ratings, thermal resistance data, ordering information, and typical performance graphs. It also includes the standard STMicroelectronics disclaimer and copyright notice.
| Peak Pulse Power | 400 W (10/1000 µs) |
|---|---|
| Stand‑off Voltage Range | 5 V to 188 V |
| Maximum Junction Temperature | -65 °C to 175 °C |
| Lead Temperature for Soldering (TL) | 260 °C (10 s) |
| Junction‑to‑Leads Thermal Resistance | 30 °C/W |
The diodes can handle a peak pulse power of 400 W for a 10 µs / 1000 µs pulse.
They are rated for stand‑off voltages from 5 V up to 188 V.
Yes, the SMAJ series includes both unidirectional and bidirectional diode types.