TVS clamp for 185V rails, AEC-Q101 qualified
The Vishay 1.5KE220AHE3_A/C is a 1500W TransZorb® TVS diode in the DO-201AA axial-lead package, designed to clamp transients on 185V nominal DC rails in automotive electronics.
Through-hole DO-201AA for high-reliability board attachment
The DO-201AA axial-lead package (also known as DO-27) is a through-hole form factor that provides robust mechanical attachment and superior thermal conduction to the PCB compared to surface-mount alternatives — relevant for high-energy pulse applications where the junction temperature spike is severe. The single unidirectional channel means this device protects one rail; for dual-polarity or AC lines, two devices or a bidirectional variant would be needed.