Package and temperature envelope
The 1.5KE20A-E3/73: Housed in a DO-201AA / DO-27 axial-lead through-hole package, the 1.5KE20A-/73 mounts into standard 0.100-inch pitch board holes — the leaded form factor suits hand-assembly, rework, and high-reliability point-to-point wiring where SMD reflow is impractical. The junction temperature range spans -55°C to 175°C, covering the full industrial band and reaching into under-hood automotive ambient — the 175°C ceiling ensures the die survives repetitive clamping events without derating the 1500 W pulse rating at elevated case temperatures.