Transient suppressor with a known EOL date
The 1.5KE250CA-E3/73: The DO-201AA axial package is a through-hole fit for existing boards — no PCB respin needed for replacement. Vishay lists this part as Obsolete.
Clamping envelope and thermal margin
The 344V maximum clamping voltage at 4.4A peak pulse current defines the protection ceiling — downstream circuitry must survive that transient without damage. The 214V reverse standoff means the diode stays transparent on a nominal 200V rail, only conducting when the surge exceeds that threshold.
Procurement for an EOL TVS
With an Obsolete status and no pin-compatible successor from Vishay, the 1.5KE250CA-/73 is sourced through independent channels. Availability is lot-specific — confirmed at RFQ, not held as shelf stock. Date-code provenance matters: verify the lot against the original Vishay date-code window to avoid mystery stock that surfaced years after the last-time-buy.