The 1.5KE47A-E3/54 part of Vishay is a unidirectional bi-directional Transient Voltage Suppressor (TVS) diode. This part is encapsulated in a molded plastic axial lead case and features an external ceramic insulator to increase the insulation level. It is constructed of the PN junction guard ring protection, plus fast response time and excellent clamping capability. This part is designed to protect sensitive electronic equipment against voltage transients generated by inductive loads and is ideal for applications that require high surge capacity, such as IEC 61000-4-5. The 1.5KE47A-E3/54 offers a 54V clamping voltage, a peak power rating of 1500W, a holding voltage of 47V, a lead-free pure-tin finish, and a RoHS compliant package.