High-voltage PIN diode for RF switching and limiting
The MMP4403-GM2 is a single PIN diode from the MMP4400 series, designed for RF switch, attenuator, and limiter circuits that need to handle high peak voltages. Its 500V peak reverse voltage rating lets it survive transmit-chain spikes that would punch through a standard switching diode.
Key parametrics for RF design
At 100 mA forward bias and 100 MHz, the series resistance is 300 mOhm — low enough to keep insertion loss under a few tenths of a dB in a 50-ohm system. Reverse-biased at 50V, the capacitance drops to 1 pF, which maintains isolation above 30 dB through L-band.
No last-time-buy risk on the horizon.
The non-hermetic plastic SMT construction means it is not hermetic — conformal coating or a sealed module is advisable in humid or condensing environments.