What 5.0SMDJ150CA/TR13 protects and where the ratings land
The CA suffix marks this as a bidirectional TVS Zener — it clamps both polarities, making it the right fit for AC rails or any node that sees reversible voltage swings. The 150 V standoff is the working voltage the protected line sits at during normal operation; the device stays invisible until the line climbs past 167 V breakdown. When a transient fires, the clamping voltage maxes out at 243 V at the rated peak pulse current of 20.6 A (10/1000 µs waveform).
Active status and what the series means for sourcing
Listed as Active per the manufacturer record. The 5.0SMDJ series is YAGEO's general-purpose unibody TVS line — the standoff voltages step in standard increments, so if the exact 150 V standoff does not fit a new design, a nearby step (160 V or 130 V) in the same package and footprint is the logical migration path.