90V rail clamp for automotive and industrial 12V/24V systems
The SMAJ90A-13-F: Rated for continuous operation from -55°C to 150°C junction temperature, it suits under-hood automotive and outdoor industrial enclosures where the ambient temperature pushes past 85°C.
What the clamping numbers mean for your 90V bus
The 100V minimum breakdown voltage (VBR at 1 mA) guarantees the device starts clamping before the rail exceeds the safe operating area of downstream silicon. At the 2.7A peak pulse current (IPP), the clamp voltage hits 146V maximum — this is the voltage the protected IC sees during a surge. For a 90V-rated MOSFET or DC-DC converter with a 150V abs-max rating, the 146V clamp leaves 4V of headroom; a tighter 120V-rated part would need a lower-voltage TVS or a series resistor to split the surge energy.
DO-214AC SMA — field-swappable with a standard iron
The DO-214AC (SMA) footprint is one of the most common TVS packages — the same land pattern serves the whole SMAJ series from 5V to 188V standoff. A standard soldering iron and tweezers are enough to swap it on a populated board; no hot-air station needed. Surface-mount assembly with Tape & Reel packaging means it feeds straight into a pick-and-place line. The SMA body is large enough that the polarity band (cathode) is readable under a magnifying lamp — orientation mistakes are rare even in rework.
Because the SMAJ series covers a wide voltage range on the same die and package platform, Diodes is unlikely to phase out individual voltage variants — the mask set and assembly tooling are shared across the whole family.