Part Pin to Pin Compatibility Polarity РC max, W VCB max, V VCE max, V VEB max, V IC max, mA hFE VCE sat, V ICBO, µA FT, МHz Nf, dB Package (Pads) PDF
КТ520А КТ520Б MPSA42 MPSA43 NPN 0.625 300 200 300 200 6 500 >40 0.5 0.4 100 50

TO-92
КТ521А КТ521Б MPSA92 MPSA93 PNP 0.625 300 200 300 200 5 500 >40 0.5 0.4 100 50

TO-92
KT814A KT814Б KT814B KT814Г BD136 BD138 BD140 PNP 10 40 50 70 100 5 1500 40…275 40…275 40…275 30…275 0.6 50 40

TO-126
КТ8225A BU941ZP NPN 155 350 350 5 15000 >300 2.7 100

TO-218