The 2N5153 from European Space Agency is a RF Transistor with Voltage - Collector Base (Vcbo) -100 V, Voltage - Collector Emitter (Vceo) -80 V, Voltage - Emitter Base -5.5 V, Collector Current (Ic) -5 A, Power Dissipation (Pdiss) 1 to 35 W. More details for 2N5153 can be seen below.