AEC-Q101 Zener TVS for 20V automotive rails
The SMCJ20CAQ-13-F: It carries AEC-Q101 qualification, meaning it has passed the stress and reliability screening required for under-hood and chassis-mounted modules. The 22.2V minimum breakdown voltage ensures the device stays off during normal operation and only conducts when the line exceeds the safe window. The -55°C to 150°C junction temperature range covers the full automotive ambient envelope, including hot-soak conditions near the engine block. No power line protection feature is included — this is a pure transient suppressor, not a reverse-polarity or overcurrent guard.
Package and board-fit: DO-214AB SMC
Housed in the DO-214AB (SMC) surface-mount package, the SMCJ20CAQ-13-F occupies the standard footprint for this power class. The base product number SMCJ20 identifies the family; the Q suffix marks the automotive-grade variant with full AEC-Q101 documentation.
Sourcing and lifecycle posture
No pin-compatible second-source is recorded in the manufacturer's cross-reference data; the part is the sole automotive-grade bidirectional 20V TVS in this SMC package from Diodes.