Product Summary

The mrf844 is an NPN silicon RF low power transistor. It is designed for 12.5V UHF large-signal, common-base amplifier applications in industrial and commercial FM equipment operating in the range of 806 to 960MHz.

Parametrics

mrf844 absolute maximum ratings: (1)Collector–Emitter Voltage VCEO: 16 Vdc; (2)Collector–Base Voltage VCBO: 36 Vdc; (3)Emitter–Base Voltage VEBO: 4.0 Vdc; (4)Collector Current - Continuous IC: 10.9Adc; (5)Operating Junction Temperature TJ: 150 °C; (6)Total Device Dissipation @ TC = 75°C: 115W, Derate above 75°C: 0.66mW/°C; (7)Storage Temperature Range Tstg: –55 to +150 °C.

Features

mrf844 features: (1)Specified @ 12.5 V, 870 MHz Characteristics @ Pout = 30 W Common Emitter Power Gain = 5.2 dB (Typ), Efficiency 50% (Typ); (2)series euqivalent large-signal characterization; (3)internally matched input for broadband operation; (4)tested for load mismatch stress at all phase angles with 20:1 VSWR @ high line and RD overdrive; (5)gold metallized, emitter ballasted for long life and resistance to metal migration; (6)silicon nitride passivated.

Diagrams

mrf844 package dimensions