It delivers 600W peak pulse power (10/1000µs waveform) with a reverse standoff voltage of 23.1V and a maximum clamping voltage of 48.3V at the peak pulse current of 83A (8/20µs).
The 23.1V reverse standoff voltage sets the maximum continuous DC voltage the TVS can sit across without conducting — it is sized for nominal 24V automotive systems where the rail may see steady-state ripple up to that level. The 600W peak pulse power defines the energy-handling capability for a standard 10/1000µs transient — adequate for suppressing load-dump and inductive-load switching spikes on moderately protected lines.
Supplied in a SMB (DO-214AA) package, the SM6T27CAY is a surface-mount device intended for reflow soldering. The SMB footprint is common across the SM6TY family, so board layout can be shared among different voltage variants.