2N1531Manufactured by ETC (Electronics Transistors Corporation NY USA)Brand new in the boxShiny, clean leadsTO3 style – steel caseBasic specifications: Material of Transistor: GePolarity: PNPMaximum Collector Power Dissipation (Pc): 106 WMaximum Collector-Base Voltage |Vcb|: 80 VMaximum Collector-Emitter Voltage |Vce|: 40 VMaximum Emitter-Base Voltage |Veb|: 40 VMaximum Collector Current |Ic max|: 10 AMax. Operating Junction Temperature (Tj): 110 CTransition Frequency (ft): 0.02 MHzForward Current Transfer Ratio (hFE), MIN: 20 Rare as hens teeth