What the D-44 package and 2 A rating mean for your board
The VS-2KBP06 is a single-phase bridge rectifier in a 4-SIP D-44 through-hole package — four leads in a single inline row, 2.54 mm pitch typical for this footprint. The 2 A average rectified current (Io) is the DC load it delivers into a capacitive or resistive load at the rated 600 V peak reverse voltage. Forward voltage drop is 1 V max at 1 A — at the full 2 A rating the junction will see higher Vf, so budget the conduction loss into the thermal calculation. Reverse leakage at rated voltage is 10 µA at 600 V — this is the standing loss when the bridge is off, negligible in most bulk supply designs but worth noting for low-power standby circuits where the bridge sits across the mains continuously.