This part is a kind of semiconductor called 1.5KE200CA.
Function of this product has (1.5KE Series) GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR.
Manufacturers : Transys
Image and pinout :
Some of the text within the PDF file :
1.5KE SERIES GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR VOLTAGE - 6.8 TO 440 Volts 1500 Watt Peak Power 5.0 Watt Steady State FEATURES l l l l l l l l Plastic package has Underwriters Laboratory Flammability Classification 94V-O Glass passivated chip junction in Molded Plastic package 1500W surge capability at 1ms Excellent clamping capability Low zener impedance Fast response time: typically less DO-201AE than 1.0 ps from 0 volts to BV min Typical IR less than 1 A above 10V High temperature soldering guaranteed: 260 /10 seconds/.375”,(9.5mm) lead length/5lbs., (2.3kg) tension MECHANICAL DATA Case: JEDEC DO-201AE molded plastic Terminals: Axial leads, solderable per MIL-STD-202, Method 208 Polarity: Color band denoted cathode except Bipolar Mounting Position: Any Weight: 0 [ ... ]