This part is a kind of semiconductor called SA10.

Function of this product has GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR(VOLTAGE - 5.0 TO 170 Volts 500 Watt Peak Pulse Power).

Manufacturers : Pan Jit International

Image and pinout :

Some of the text within the PDF file :

SA5.0 THRU SA170CA GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR VOLTAGE - 5.0 TO 170 Volts 500 Watt Peak Pulse Power FEATURES l l l l l l l Plastic package has Underwriters Laboratory Flammability Classification 94V-O Glass passivated chip junction 500W Peak Pulse Power capability on 10/1000 £g S waveform Excellent clamping capability Repetition rate(duty cycle): 0.01% Low incremental surge resistance Fast response time: typically less than 1.0 ps from 0 volts to BV for unidirectional and 5.0ns for bidirectional types Typical ID less than 1 £g A above 10V High temperature soldering guaranteed: 300 ¢J /10 seconds/.375”,(9.5mm) lead length/5lbs., (2.3kg) tension MECHANICAL DATA Case: JEDEC DO-15 molded plastic over passivated junction Terminals: Plated Axial leads, solderable [ ... ]

SA10 PDF Datasheet Download