1500W automotive TVS in a DO-201 axial lead
The 1.5KE20AH: Reverse standoff voltage of 17.1V means the diode stays off (leakage only) on a nominal 12V or 15V bus, but clamps at 27.7V max when the surge hits, shunting up to 56A of peak pulse current through the DO-201 package. Breakdown voltage min is 19V, so the device begins conducting between 19V and the clamp ceiling — this window protects downstream silicon rated for 30V or less.
Automotive-grade qualification per AEC-Q101 means the 1.5KE20AH passed the full suite of stress tests: temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness — required for PPAP submission on engine-control, body, or chassis modules. No power line protection (the part is a transient suppressor, not a rail clamp), so it is intended for unidirectional protection on DC buses, not AC mains.
Active production, DO-201 axial leaded package
The DO-201AA (DO-27) axial package is a through-hole form factor that mates with standard 0.036-inch diameter lead holes on a 2.54mm pitch grid.