This part is a kind of semiconductor called KNB2520.
Function of this product has (KNB2520 - KNB2523) Capacitor.
Manufacturers : Iskra
Image and pinout :
Some of the text within the PDF file :
Capacitors: Type KNB 2520 2522 2523 250 V AC, 300 V AC class Y2 TECHNICAL DATA: Construction: Rated voltage: Capacitance tolerance: Climatic category: Passive flammability: Temperature range: Test voltage: Max. pulse rise time du/dt, at 425 V D.C.: polypropylene film, metallized 250 V A.C., 300 V A.C. ± 20 %, ± 10 % 40/100/56 according to IEC 60068-1 according to IEC 60384-14 - 40 ° C to + 100 ° C 4000 V D.C., 1 s or 2600 V A.C., 2 s 3000 V/µs for 1000 pF 2500 V/µs for 1500 pF 2000 V/µs for 2200 pF up to 6800 pF PCM10 1500 V/µs for PCM ≥ 15 according to IEC 60384-14 Ri ≥ 15000 MΩ Marking KNB2520: Capacitance Tolerance KNB2520 _ _ _ µF 250V AC ±___% MKP Y2 40/100/56/B Insulation resistance at 20 ° C, Um = 100 V D.C., t = 1 min: Dielectric lo [ ... ]