This part is a kind of semiconductor called BB301M.
Function of this product has Build in Biasing Circuit MOS FET IC UHF RF Amplifier.
Manufacturers : Hitachi
Image and pinout :
Some of the text within the PDF file :
BB301M Build in Biasing Circuit MOS FET IC VHF RF Amplifier ADE-208-506 1st. Edition Features • Build in Biasing Circuit; To reduce using parts cost & PC board space. • Low noise characteristics; (NF = 1.3 dB typ. at f = 200 MHz) • Withstanding to ESD; Build in ESD absorbing diode. Withstand up to 200 V at C = 200 pF, Rs = 0 conditions. Outline MPAK-4 2 3 1 4 1. Source 2. Gate1 3. Gate2 4. Drain BB301M Absolute Maximum Ratings (Ta = 25°C) Item Drain to source voltage Gate 1 to source voltage Gate 2 to source voltage Drain current Channel power dissipation Channel temperature Storage temperature Symbol VDS VG1S VG2S ID Pch Tch Tstg Ratings 6 +6 –0 ±6 25 150 150 –55 to +150 Unit V V V mA mW °C °C 2 BB301M Electrical Characteristics (Ta = 25°C) Item Drain to source brea [ ... ]