Device identity and board function
The 1.5KE210-B: The DO-201AA (DO-27, axial) through-hole package suits point-to-point wiring on terminal blocks or PCB mounting where the lead bend radius is controlled to avoid stress cracks in the glass passivation.
Temperature envelope and junction reality
Operating junction temperature range spans -55°C to 175°C — the 175°C ceiling is the silicon die limit, not the solder joint. In a 125°C ambient, derate the peak pulse power by the thermal resistance curve; the 1500 W rating is at 25°C lead temperature. The unidirectional channel (single line) means the cathode band identifies the anode-to-ground orientation — reverse the polarity and the device conducts at the Zener knee instead of clamping the transient.
Obsolete status and sourcing path
Quantities are lot-specific; availability and pricing are confirmed at RFQ time.