400W Zener TVS for 26V automotive rails
The SMAJ26AQ-13-F: The 26V reverse standoff voltage means it sits across a 24V automotive bus and stays dark during normal operation — it only conducts when the line spikes above 28.9V breakdown. Clamping is specified at 42.1V maximum at the 9.5A peak pulse current — this is the voltage the downstream electronics see during a transient. The DO-214AC (SMA) surface-mount package keeps the thermal path short to the PCB copper pour, which is the primary heatsink for the 400W pulse.
AEC-Q101 qualification and automotive deployment
This part carries AEC-Q101 qualification, the automotive-grade standard for discrete semiconductors. The -55°C to 150°C junction temperature range covers under-hood and cabin environments — the 150°C ceiling is the die temperature, not the ambient, so the board's thermal design must keep the junction below that under repetitive pulse conditions.
Sourcing and compliance
As an AEC-Q101 device, the part ships with full lot traceability and the manufacturer's standard RoHS/REACH compliance documentation.