What the 1.5 kW rating means for your protection design
The 1.5KE200CA-B: That 274 V clamping voltage at 5.5 A peak pulse current tells you the worst-case voltage the downstream circuitry sees during a surge — a 24 V or 48 V rail protected by this part clamps hard at 274 V, so the load's absolute maximum rating must sit above that level. The 171 V reverse standoff voltage (working voltage) means the diode draws negligible leakage below that threshold; the breakdown starts at 190 V minimum. For a nominal 170 VDC bus, this part stays out of the circuit until a transient pushes the line above 190 V.
Through-hole mounting in a DO-201AA (DO-27) axial-lead package, supplied as Bulk. The DO-201 footprint is a standard 0.375-inch lead spacing — the same as a 1N540x rectifier — so it drops into existing PCB layouts without a board spin. The supplier device package is DO-201. No power line protection (it is a TVS, not a crowbar or PTC).
Lifecycle reality — obsolete, sourced to order
Diodes Incorporated lists the 1.5KE200CA-B as Obsolete. Confirm the replacement's clamping voltage and peak pulse current match the protection requirement before committing.
What compliance documentation is available
The evidence does not carry RoHS, REACH, UL, or IEC certification statements for this specific order code. For obsolete stock sourced through independent channels, compliance documentation is lot-specific — request the certificate of conformance and the RoHS/REACH declaration at RFQ time.