1.5KE51CA with 70.1V 48.5V 43.6V DO-201 TVS ROHS is a Transient Voltage Suppressor Diode manufactured by Yageo. This part is designed to protect sensitive electronic equipment against voltage transients generated by lightning or other sources. It has a breakdown voltage of 70.1V, a clamping voltage of 48.5V, and a stand off voltage of 43.6V. The packaging for this part is a DO-201 designation with RoHS compliance.