1500 W peak pulse — what the clamping voltage means for your rail
The 1.5SMC200A TR13 PBFREE: The 171 V reverse standoff voltage means it sits across a 170 V DC bus without conducting leakage current under normal conditions — the device only starts clamping when the transient exceeds the 190 V minimum breakdown voltage.
Clamping at 274 V — the margin between the rail and the protected IC
At the rated 5.5 A peak pulse current, the clamping voltage is 274 V maximum. That figure is the ceiling for the downstream components — if the protected circuit's absolute-max rating is below 274 V, this TVS will not catch the transient before damage occurs. The 1500 W rating assumes a 10/1000 µs surge; shorter pulses (8/20 µs) allow higher peak current before the junction temperature limit is reached.
DO-214AB SMC — board footprint and thermal path
Housed in a DO-214AB (SMC) surface-mount package, the 1.5SMC200A TR13 PBFREE mounts on standard PCB pads for this JEDEC outline.
Active production — sourcing posture
Central Semiconductor lists this part as Active.