E L E C T R O N I C P4KE6.8(C)-LF THRU P4KE540(C).
P4KE18CA-LF - (P4KExxx-LF) 400W TRANSIENT VOLTAGE SUPPRESSOR
P4KE18CA - TVS Diode
P4KE18C-LF - (P4KExxx-LF) 400W TRANSIENT VOLTAGE SUPPRESSOR