Clamp voltage and the 162 V standoff ceiling
The 1.5SMC200CH: Its 162 V reverse standoff voltage means the protected line can sit at 162 VDC continuously without the diode conducting — the device stays invisible until a transient pushes the line above the 180 V minimum breakdown threshold. When the transient arrives, the diode clamps at 287 V maximum while shunting 5.4 A of peak pulse current. That 287 V ceiling is the number to check against the downstream component's abs-max rating — if the load can survive 287 V for the 10/1000 µs pulse, this part provides adequate protection.
The DO-214AB (SMC) package is the standard footprint for 1500 W TVS diodes in this power class. The large copper tab on the bottom side conducts heat to the PCB pad — the board copper area under the package determines the actual thermal impedance, not the package itself.
Sourcing and compliance posture
Taiwan Semiconductor Corporation provides RoHS and REACH compliance documentation for this part. The AEC-Q101 qualification report and the product change notification (PCN) history are available from the manufacturer upon request through the supply chain.