What this 1.5kW TVS does on the board
The 1.5KE440AHA0G: Packaged in a DO-201AA (DO-27) axial-lead through-hole body, it handles the 1.5 kW pulse without the thermal limits of a surface-mount part — the leaded package sinks heat into the PCB pads and surrounding air better than an SMC or SMB in the same power class.
Automotive-grade transient protection
With a single unidirectional channel and no power-line protection feature, it is designed for signal or low-power supply rail clamping — not for AC mains or high-side battery direct connection. The 376 V standoff suits 300 VDC bus rails or 277 VAC rectified lines where the nominal voltage sits below the standoff.
Sourcing and lifecycle reality
The base product number is 1.5KE440, so variants with different suffixes (e.g., 1.5KE440A, 1.5KE440CA) share the same die and package but differ in polarity or tolerance — confirm the exact AHA0G suffix for your approved vendor list.