Automotive-grade TVS in a through-hole axial package
The 1.5KE20CHE3/54: The bidirectional configuration means a single device clamps transients of either polarity — useful on AC-coupled or floating lines where the signal swings both sides of ground, reducing component count on the PCB.
Rated 1500W for a 10/1000 µs exponential waveform, the 1.5KE20CHE3/54 absorbs high-energy transients like load-dump or inductive kickback without failing short. The 16.2V standoff voltage means the diode stays transparent below that DC or peak-AC level; above it, breakdown starts at 18V minimum and the clamp holds at 29.1V maximum, limiting the voltage seen by the protected circuit. The 175°C junction rating is typical for AEC-Q101-qualified parts, allowing placement near heat sources like exhaust manifolds or turbocharger electronics.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE20CHE3/54 as obsolete. For new designs, consider Vishay's current automotive TransZorb® family in the same DO-201AA package — the electrical ratings (standoff, clamp, peak pulse) vary by suffix. A cross-reference search against the 16.2V standoff and 1500W rating will identify a pin-compatible active ordering code.