PLAB-250 was a post war bomb. The PLAB-100 began being tested operationally in 1941 (being initially called MPLAB-100) but, due to production issues, it entered in service in 1943. The color drawing is indeed a PLAB-100.
The PLB-100 was designed to be dropped from altitudes of 300-800 m
When the PLAB-100 was dropped from the aircraft, the exhaust sling, tearing off the cover, removed the brake parachute from its compartment and after 4-5sec activated the fuse.
The fuse arrangement was double: An AM-A head fuse with a short shank for instant action of the aerial bomb against surface targets and a base hydrostatic AB-87 or VM-7 fuse, activated at periscope depth (these are anti-submarine bombs, not depth bombs).
Here's a detailed drawing and data for this bomb:
There was also the GAB-100, a smoke bomb, intended for setting up camouflage smoke screens at sea in order to cover the attacks and maneuvers of their ships, that entered service in 1939 (operationally tested from 1936) , then improved in 1944 (GAB-100D)
And these are models of this bombs (From Sergey's exhaustive Soviet Bombs pack that he kindly authorized me to export in Il2 but till now, though I converted the whole pack to 3ds, I have only exported the Soviet bombs used in Spanish Civil War) - I'll try to export these 2 and make their java next week-end