What this 1500W axial TVS diode does on the board
The 1.5KE56HE3/54: It clamps transients at 80.5V max when hit with 18.6A peak pulse current, protecting downstream electronics from voltage spikes on automotive 12V or 24V buses.
Package and board-fit for the rework bench
Housed in a DO-201AA (DO-27) axial-lead through-hole package, this diode is a hand-solderable part — no hot-air profile needed. The 1.5KE body diameter is about 5.3mm, and the leads are 0.96mm diameter tinned copper, fitting standard 1.0mm PCB holes. The axial form factor means it mounts standing up or lying flat, depending on your board clearance. For a rework tech replacing one on a crowded board, the leads are long enough to lift and snip without pulling the pad.
Lifecycle reality — obsolete, no direct successor
Vishay has marked the 1.5KE56HE3/54 as obsolete. For a BOM that already uses this axial part, the only sourcing path is through independent surplus or broker channels. We can quote against your quantity and confirm availability at RFQ time — no stock-holding claim, but we can hunt lots with traceability.