• Siemens SIRIUS 3UG5 Current/Voltage/Cos phi/Power Monitoring Relays
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Siemens SIRIUS 3UG5 Current/Voltage/Cos phi/Power Monitoring Relays

Siemens SIRIUS 3UG5 Current/Voltage/Cos phi/Power Monitoring Relays

Digitally adjustable SIRIUS 3UG5 relays monitoring current, active current, voltage, power factor and power of motors and loads.

Key features

  • Monitors current, active current, voltage, power factor (cos phi) and power
  • 3UG5643 internally powered from 90-690 V AC, current 0.05-10 A
  • 3UG5642 with 24-240 V AC/DC auxiliary supply, current 0.003-10 A
  • Versions for safety applications, with Bluetooth (3UG5742) and for IO-Link (3UG5842)
  • For AC active currents above 10 A use with 4NC current transformers

Specifications

Brand Siemens
Product line SIRIUS 3UG5
Function I, Ires, U, cos phi, P monitoring
Setting Digital
Mounting DIN rail, stand-alone
Source Siemens Catalog IC 10 · 2026, p. 986
3UG5643-1CS20 Current: 0.05 ... 10 A | Supply: Internal, 90 ... 690 V AC | Contacts: 2 CO | Version: Standard | Connection: Screw
3UG5643-2CS20 Current: 0.05 ... 10 A | Supply: Internal, 90 ... 690 V AC | Contacts: 2 CO | Version: Standard | Connection: Spring-loaded (push-in)
3UG5642-1CW30 Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Standard | Connection: Screw
3UG5642-2CW30 Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Standard | Connection: Spring-loaded (push-in)
3UG5642-1CW31 Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Safety applications | Connection: Screw
3UG5642-2CW31 Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Safety applications | Connection: Spring-loaded (push-in)
3UG5742-1CW30 Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: With Bluetooth | Connection: Screw
3UG5742-2CW30 Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: With Bluetooth | Connection: Spring-loaded (push-in)
3UG5842-1AA40 Current: 0.003 ... 10 A | Supply: 24 V DC | Contacts: 1 CO | Version: IO-Link | Connection: Screw
3UG5842-2AA40 Current: 0.003 ... 10 A | Supply: 24 V DC | Contacts: 1 CO | Version: IO-Link | Connection: Spring-loaded (push-in)
Monitoring RelaysSiemens
10 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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Siemens SIRIUS 3UG5 Current/Voltage/Cos phi/Power Monitoring Relays

Brand Siemens·Monitoring Relays

Available part numbers (10)

3UG5643-1CS20, 3UG5643-2CS20, 3UG5642-1CW30, 3UG5642-2CW30, 3UG5642-1CW31, 3UG5642-2CW31, 3UG5742-1CW30, 3UG5742-2CW30, 3UG5842-1AA40, 3UG5842-2AA40

How to order

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Product codes & specifications
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Product codeSpec
3UG5643-1CS20Current: 0.05 ... 10 A | Supply: Internal, 90 ... 690 V AC | Contacts: 2 CO | Version: Standard | Connection: Screw
3UG5643-2CS20Current: 0.05 ... 10 A | Supply: Internal, 90 ... 690 V AC | Contacts: 2 CO | Version: Standard | Connection: Spring-loaded (push-in)
3UG5642-1CW30Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Standard | Connection: Screw
3UG5642-2CW30Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Standard | Connection: Spring-loaded (push-in)
3UG5642-1CW31Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Safety applications | Connection: Screw
3UG5642-2CW31Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: Safety applications | Connection: Spring-loaded (push-in)
3UG5742-1CW30Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: With Bluetooth | Connection: Screw
3UG5742-2CW30Current: 0.003 ... 10 A | Supply: Aux. 24 ... 240 V AC/DC | Contacts: 2 CO | Version: With Bluetooth | Connection: Spring-loaded (push-in)
3UG5842-1AA40Current: 0.003 ... 10 A | Supply: 24 V DC | Contacts: 1 CO | Version: IO-Link | Connection: Screw
3UG5842-2AA40Current: 0.003 ... 10 A | Supply: 24 V DC | Contacts: 1 CO | Version: IO-Link | Connection: Spring-loaded (push-in)

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