BMP-2 with K-1 ERA

The ERA there is clearly can't protect nothing. This is clearly a VBIED with task to blowing up and destroy the BMP with crew and infantery team.

I see no other reason for mounting a standard tank ERA on a thin armored personnel carrier. For back in 1988, on the NII Stali tests of a Kontact-3, (Kontakt-1 ERA adapted for BMP-2)  remote sensing device with 4C20 ERA protection elements on the BMP-2, an unambiguous result was obtained:

"Field tests of these complexes, however, showed their complete unsuitability for use in the protection of the IFV/APC. Thin armor during a joint explosion of a DZ block and a grenade, when the total mass of the blown up explosive reached 1,1-1,2 kg, simply broke, incapacitating the machine itself."

 

BMP-2 fitted with Kontakt-3 ERA

Broken side armor of the BMP-2 after ballistic test.