1 Ohm forward resistance at 100 MHz — the RF insertion-loss number
The Infineon BAR6303WE6327HTSA1 is a single PIN diode in a SOD-323 package, designed for RF switching and attenuator circuits up to several gigahertz. Its forward resistance of 1 Ohm at 10 mA forward current and 100 MHz sets the insertion loss floor in the on-state — lower resistance means less signal loss through the switch path.
0.3 pF capacitance — off-state isolation budget
Capacitance is 0.3 pF at 5 V reverse bias and 1 MHz. In the reverse-biased (off) state, this capacitance determines how much RF signal leaks across the diode. A 0.3 pF value gives good isolation at UHF and low-microwave frequencies; for higher bands the designer budgets this into the shunt or series arm of the switch.
50 V peak reverse and 100 mA continuous rating
Peak reverse voltage is 50 V and maximum continuous forward current is 100 mA. These are the voltage and current ceilings for the RF envelope — the diode must stay below both to avoid forward-bias breakdown or thermal runaway. Power dissipation is capped at 250 mW, which in the SOD-323 package means the board copper area under the cathode pad sets the thermal path.