The SMB series from Microsemi are low‑profile, surface‑mount transient absorption zener (TAZ) devices designed to protect sensitive circuitry from voltage spikes caused by lightning, inductive load switching, ESD, and NEMP. They are offered in both unidirectional and bidirectional versions and feature low inductance and a wide voltage range.
Electrical characteristics include a peak power rating of 600 W for a 1 ms pulse, forward surge capability of 50 A, and operation from –65 °C to +175 °C. Mechanical details specify DO‑214AA (SMB) and DO‑215AA packages with gull‑wing or C‑bend leads, and typical thermal resistance of 25 °C/W. Package dimensions and derating curves are provided for design reference.
| Voltage range | 5.0 V to 170 V |
|---|---|
| Peak power dissipation | 600 W (10 µs pulse) |
| Directionality | Unidirectional and Bidirectional |
| Low inductance | Yes |
| Operating temperature range | -65 °C to +175 °C |
| Thermal resistance (junction‑to‑lead) | 25 °C/W (typical) |
| Package type | DO‑214AA (SMB) / DO‑215AA |
| Lead style | Gull‑wing or C‑bend |
| Forward surge rating | 50 A |
The SMB series operates from 5.0 V up to 170 V.
They can dissipate up to 600 W of peak power for a 1 ms pulse.
Yes, the SMB series includes both unidirectional and bidirectional devices.
The devices are offered in DO‑214AA (SMB) and DO‑215AA surface‑mount packages.