RF detector diode in a SC-70 twin pack
The Infineon BAT15-05WH6327XTSA2 is a dual Schottky diode with a common-cathode configuration, designed for RF mixer and detector circuits up to low-VHF bands. The two diodes share the cathode terminal, so you get a matched pair in one SC-70 package for balanced or push-pull front ends.
0.5 pF junction capacitance — the RF enabler
Junction capacitance is 0.5 pF at 0 V reverse bias, measured at 1 MHz. That low value keeps the diode from loading the RF signal path at UHF frequencies — the self-resonant point stays well above 1 GHz for detector and mixer applications. Series resistance is 5.5 Ohm at 50 mA forward current, also at 1 MHz. This resistance contributes to the conversion loss in a mixer; lower is better for sensitivity, and 5.5 Ohm is typical for a small-signal Schottky in this package class. Peak reverse voltage is 4 V — this is not a power rectifier. Exceeding 4 V reverse will avalanche the junction. The 110 mA maximum forward current and 100 mW power dissipation limit confirm the small-signal role: think RF level detection, not bulk rectification.
SC-70 footprint and 150 °C junction rating
Housed in an SC-70 (SOT-323) package with the Infineon PG-SOT323-3 variant. The three-pin footprint is standard for a dual common-cathode diode — the common cathode is pin 2, anodes on pins 1 and 3. The junction is rated to 150 °C, which gives headroom for reflow soldering and moderate ambient heat inside an RF module.
Active production — no obsolescence worry
Infineon lists the BAT15-05WH6327XTSA2 with an active product status.