Obsolete — last-time-buy window closed
Diodes Incorporated lists the P6KE300CA-T as Obsolete.
600W bidirectional transient suppressor
The P6KE300CA-T is a 600 W peak pulse power Zener TVS diode in a through-hole DO-15 axial package. Bidirectional, it clamps transients of either polarity — suited for AC signal lines or bipolar DC rails where the protection must work symmetrically without regard to orientation. Reverse standoff voltage is 256 V; breakdown occurs at a minimum of 285 V. This window — 256 V standoff, 414 V clamp — defines the protected rail voltage and the maximum transient let-through the downstream circuitry must survive. The DO-15 axial body is a standard through-hole footprint — the leads are formed for board insertion or point-to-point wiring.
Sourcing reality for an obsolete part
With the P6KE300CA-T marked Obsolete by Diodes Incorporated, new production has ceased. No pin-compatible direct replacement is listed by the manufacturer; a parametric search against the 256 V standoff / 600 W rating class will identify functional alternatives if a board spin is acceptable.