AEC-Q101 qualified 30V bidirectional TVS for 12V/24V automotive bus clamping
The SMAJ30CAQ-13-F: It clamps transients to 48.4V maximum at 8.3A peak pulse current. AEC-Q101 qualification places this part in the automotive grade tier — the OEM auditor will ask for PPAP documentation from the authorized distribution channel. The -55°C to 150°C junction temperature range covers underhood and cabin environments.
Voltage clamping triplet and pulse current rating
The three voltage thresholds that define the protection corridor: reverse standoff (30V typical) is the DC bus voltage the part blocks without conducting; breakdown (33.3V minimum) is where avalanche starts; clamping (48.4V maximum at 8.3A Ipp) is the peak voltage the downstream circuitry sees during a surge. For shorter pulses (8/20µs waveform common in IEC 61000-4-5), the peak power capability is significantly higher — the 400W rating is the conservative anchor for worst-case line-length surges. The DO-214AC (SMA) package with a glass-passivated junction handles the thermal pulse without secondary breakdown. The copper pad area on the PCB under the cathode tab sets the thermal impedance for repetitive surge events.
Active production status and sourcing posture
Pricing and availability confirmed at RFQ time. The base product number SMAJ30 covers the family; the -F suffix indicates lead-free and RoHS-compliant finish.