The STMicroelectronics P6KE56ARL is a 600W peak-pulse Zener TVS diode from the P6KE TRANSIL™ series, designed for clamping transients on general-purpose power and signal lines. It offers a 48V reverse standoff voltage, a minimum breakdown of 53.2V, and a maximum clamping voltage of 100V at the rated 40A (8/20µs) peak pulse current. The single unidirectional channel is housed in a DO-204AC (DO-15) axial-lead through-hole package.
Obsolete — sourcing from the independent channel
For a buyer filling a BOM line, the 600W pulse rating, 48V standoff, and DO-15 footprint are the critical fit parameters — verify these against your protection budget before committing the line.
Date-code traceability and counterfeit screening
Because this part is obsolete, any stock moving through the independent channel should be screened for authenticity. The laser-etched date code and top-side marking must match STMicroelectronics' known font and plant conventions for the claimed production week. A decap and X-ray check can confirm the die matches the TRANSIL™ design rules — particularly the junction geometry that delivers the 600W rating. Insist on lot traceability documentation from the supplier.