CJX2-8011 3P+NO+NC 80a 220v coil voltage three phase contactor 220vac coil ac contactor with 85% silver contacts tesys k reversing contactor 3p 3no dc lp2k1201zd lp2 k1201zd 12a 20vdc lp2k1201ud lp2 k1201ud 12a 250vdc coil