Esterase that exhibits the highest activity towards Tween detergents and p-nitrophenyl esters of short acyl chain length. Also displays a low thioesterase activity towards palmitoyl-coenzyme A, but is not active towards acetyl-coenzyme A. a carboxylic ester + H2O = a carboxylate + an alcohol + H(+) Belongs to the 'GDSL' lipolytic enzyme family.