What this TVS does on your rail
The 1.5KE200A-B: When the voltage exceeds 190 V breakdown, it clamps at 274 V maximum, shunting up to 5.5 A of surge current (10/1000 µs waveform). It is unidirectional (single-channel) and comes in a through-hole DO-201AA axial package — easy to hand-solder and retrofit into existing boards or point-to-point wiring.
Sourcing an obsolete part
Diodes Incorporated lists the 1.5KE200A-B as obsolete. We source this part through independent distribution channels — surplus and new-old-stock inventory.
Package and temperature fit
The DO-201AA axial package (also known as DO-27) is a through-hole form factor that suits hand-soldering, breadboard prototyping, and field replacement. The supplier device package is DO-201.
What it is not for
This part has no power line protection rating — it is not intended for AC mains transient suppression. Use it on DC rails where the standoff voltage (171 V) and clamping (274 V) match your circuit's maximum operating voltage and downstream device ratings.