The 1N6623: Rated 880 V reverse voltage and 1 A average rectified current — this diode handles high-voltage rails in PFC boost stages or flyback snubbers where the peak inverse voltage exceeds 600 V. The 50 ns reverse recovery time (trr) classifies it as a fast recovery type per the < 500 ns threshold, so it switches off quickly enough to keep switching losses manageable in a 50–100 kHz converter. Reverse leakage is only 500 nA at 880 V, so the diode does not contribute measurable standby loss in high-impedance circuits. Capacitance is 10 pF at 10 V, 1 MHz — low enough that the diode does not load the switching node in a high-frequency snubber.
Through-hole axial package (DO-204AL / A, Axial per the listing) — the leads are inserted into plated through-holes and soldered on the opposite side. The body diameter and lead spacing match standard axial-lead footprints; the part stands off the board when the leads are formed, which aids convection cooling around the body. Supplied in bulk — no tape-and-reel packaging, so the diode is handled as loose parts. For automated insertion, a tube or ammo-pack variant would be needed; bulk suits manual assembly or low-volume rework.