... are designed for AC 60HZ, rated voltage A.C. up to 660V, rated voltage D.C. up to 440V. ... for operation in electric circuits control the AC voltage up to 660 in the frequency of 50- ... 60 Hz, and the DC voltage to 440 V, under the forcing of control ... shown in Table 1. Table 1voltage rating, Vdirect current44050/60 Hz alternating current660Ampere rating, A16Actuation force of switch, H, ...