DF37NC-50DS DF37NC-50DS-0.4V DF37NC-50DS-0.4V(51) DF37NC-50DS-0.4V(53) DF37NC-50DS-0.4V(75) DF37NC-60DS DF37NC-60DS-0.4(51) DF37NC-60DS-0.4V DF37NC-60DS-0.4V (51) DF37NC-60DS-0.4V(51)