PIN diode for RF limiting and switching
The MML4403-GM2 is a single PIN diode from Microchip Technology's MML4400 series, described as a silicon limiter in a non-hermetic plastic package. It's built for RF front-end protection — the 1 Ω series resistance at 100 mA and 100 MHz tells you the insertion loss stays low when forward-biased, while the 1.5 pF capacitance at 0 V reverse bias keeps the off-state isolation clean up through UHF bands. Rated for 75 V peak reverse voltage, this diode handles moderate RF power levels without breaking down.
Housed in a 2-SMD no-lead package (supplier device package 2-SMD), the MML4403-GM2 has a low-profile, solderable footprint with no exposed leads — the contact pads are on the bottom face. This is a hand-solderable SMD part if you've got a fine tip and steady hands, though a hot-air station makes the reflow more repeatable. The bulk packaging means you're getting loose parts in a bag or tube, not tape-and-reel, so plan for manual placement or a tube feeder.