This part is a kind of semiconductor called 1N1124A.

Function of this product has Silicon Standard Recovery Diode.

Manufacturers : GeneSiC

Image and pinout :

Some of the text within the PDF file :

Silicon Standard Recovery Diode Features • High Surge Capability • Types from 50 V to 600 V VRRM • Not ESD Sensitive Note: 1. Standard polarity: Stud is cathode. 2. Reverse polarity (R): Stud is anode. 3. Stud is base. 1N1199A thru 1N1206AR VRRM = 50 V - 600 V IF = 12 A DO-4 Package Maximum ratings, at Tj = 25 °C, unless otherwise specified Parameter Symbol Conditions 1N1199A(R) 1N1200A(R) 1N1202A(R) 1N1204A(R) 1N1206A(R) Unit Repetitive peak reverse voltage RMS reverse voltage DC blocking voltage Continuous forward current VRRM VRMS VDC IF TC ≤ 150 °C 50 100 200 35 70 140 50 100 200 12 12 12 Surge non-repetitive forward current, Half Sine Wave IF,SM TC = 25 °C, tp = 8.3 ms 240 240 240 400 600 V 280 420 V 400 600 V 12 12 A 240 240 A Operating temperature Storage [ ... ]

1N1124A PDF Datasheet Download