This part is a kind of semiconductor called BCR20KM-12L.

Function of this product has Triac.

Manufacturers : Renesas

Image and pinout :

Some of the text within the PDF file :

BCR20KM-12L Triac Medium Power Use Features • IT (RMS) : 20 A • VDRM : 600 V • IFGTI, IRGTI, IRGT : 30 mA (20 mA)Note5 • Viso : 2000 V Outline TO-220FN 1 23 REJ03G0329-0200 Rev.2.00 Nov.09.2004 • Insulated Type • Planar Passivation Type • UL Recognized : Yellow Card No. E223904 File No. E80271 2 3 1 1. T1 Terminal 2. T2 Terminal 3. Gate Terminal Applications Vacuum cleaner, electric heater, light dimmer, copying machine, and other general controlling devices Maximum Ratings Parameter Repetitive peak off-state voltageNote1 Non-repetitive peak off-state voltageNote1 Symbol VDRM VDSM Voltage class 12 600 720 Unit V V Rev.2.00, Nov.09.2004, page 1 of 6 BCR20KM-12L Parameter RMS on-state current Surge on-state current I2t for fusing Peak gate power dissipation Average ga [ ... ]

BCR20KM-12L PDF Datasheet Download