High Voltage Connectors Series 51 71 91 When high voltages must be transmitted in combination with high currents, ST / BU high-voltage connectors provide a reliable solution. They are suitable for use both inside control cabinets and for external device connections. A comprehensive range of matching accessories for highvoltage and high-current applications is also available, ensuring safe, flexible, and application-optimized system integration. High Voltage Connectors Series 51, 71, 91 Max. Operating AC Voltage Voltage DC Voltage Max. Current Test Current Contact / Housing Contact (mated) Safety Protection Connection 7000 VAC 10000 VDC 30 AAC 15000 VDC Teflon Solder lugs, Strain relief B 57 mm I 2.2 in 60 mm I 2.4 in 60 mm I 2.4 in High Voltage Connectors Series 51 71 91 | 02.2026 Subject to change and error. Please note: that in Europe, we use a comma as the separator, while in the USA, a period is used.