1.5KE20CA — 1500 W bidirectional TVS in DO-201
The Littelfuse 1.5KE20CA is a 1500 W peak pulse power bidirectional TVS diode in the 1.5KE series, housed in a DO-201AA (DO-27) axial-lead through-hole package. The 17.1 V reverse standoff voltage means this part sits across a 12 V or 15 V rail without conducting in normal operation; the breakdown window starts at 19 V minimum, so it stays clear of the rail tolerance band.
Clamp voltage and surge current — what the ratings mean
The single bidirectional channel handles positive and negative transients symmetrically, which simplifies layout for AC signal lines or DC rails where polarity reversal is possible.