This part is a kind of semiconductor called ARF446.

Function of this product has N-CHANNEL ENHANCEMENT MODE.

Manufacturers : Advanced Power Technology

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Some of the text within the PDF file :

D G S TO-247 ARF446 ARF447 Common Source RF POWER MOSFETs N - CHANNEL ENHANCEMENT MODE 250V 250W 65MHz The ARF446 and ARF447 comprise a symmetric pair of common source RF power transistors designed for push-pull scientific, commercial, medical and industrial RF power amplifier applications up to 65 MHz. • Specified 250 Volt, 40.68 MHz Characteristics: • Output Power = 250 Watts. • Gain = 15dB (Class C) • Efficiency = 75% MAXIMUM RATINGS Symbol VDSS VDGO ID VGS PD RθJC TJ,TSTG TL Parameter Drain-Source Voltage Drain-Gate Voltage Continuous Drain Current @ TC = 25°C Gate-Source Voltage Total Power Dissipation @ TC = 25°C Junction to Case • Low Cost Common Source RF Package. • Very High Breakdown for Improved Ruggedness. • Low Thermal Resistance. • Nitride Passivated Di [ ... ]

ARF446 PDF Datasheet Download