600W bidirectional transient suppressor
The STMicroelectronics SM6T68CA is a bidirectional TVS diode from the TRANSIL™ SM6T family, rated for 600W peak pulse power (10/1000 µs waveform). It protects a single line with a reverse standoff voltage of 58.1V and clamps transients at 121V maximum, handling 33A peak pulse current (8/20 µs). The bidirectional configuration suits AC signal lines or dual-polarity power rails where polarity-agnostic clamping is needed.
Breakdown and clamping — what they mean for protection
With a minimum breakdown voltage of 64.6V and a maximum clamping voltage of 121V at rated peak pulse current, this part protects 48V to 60V rails from surges. The 58.1V reverse standoff means the device does not conduct at normal operating voltage up to that level, so it sits transparently on the line until a transient exceeds the threshold. The 600W peak pulse rating defines the energy it can absorb in a single surge event — enough for industrial and telecom line protection where the threat model is a lightning-induced transient or inductive kickback.
Housed in the DO-214AA (SMB) surface-mount package, the SM6T68CA fits standard pick-and-place assembly with a compact footprint.
STMicroelectronics lists the SM6T68CA as Active.