75 V, 200 mA switching diode in UB package
The 1N4148UB/TR is a standard small-signal switching diode from Microchip Technology, rated for 75 V DC reverse voltage and 200 mA average rectified forward current. The 20 ns reverse recovery time (trr) places it in the fast-switching class for general-purpose signal rectification and clamping. Housed in a 3-SMD no-lead UB package (Supplier Device Package: UB), it mounts flush to the PCB with no protruding leads — suited for low-profile or vibration-sensitive assemblies where a traditional SOD-123 or DO-35 body would stand too tall.
Parametric fit for signal switching and clamping
Reverse leakage is 500 nA maximum at 75 V, which keeps the off-state power dissipation negligible in high-impedance bias networks or sample-and-hold front ends where leakage current would shift the DC operating point. Capacitance is 4 pF at 0 V reverse bias, 1 MHz — this low junction capacitance preserves signal integrity in high-speed switching up to several MHz, and the 20 ns trr ensures the diode recovers fast enough for flyback snubbing and inductive kickback clamping in relay-drive circuits.
Supplied in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly.