KM-Gehäusetech Elektronik

Interfaces isolator

USB-Isolators for protection and security of interfaces

  • galvanic isolation  
  • protect for USB-interfaces
  • for trouble-free measurements
  • single- and dual-port available

USB-Isolator single port

The isolator integrated in an aluminium enclosure (series ALU-PRIMUS) isolates a USB-connection galvanicly from the PC. It serves to protect the interfaces and to avoid ESD damage to the computer. 

An additional function is the prevention of ground loops in the audio range (humming), the isolation (protection) in the medical area, during laboratory tests and during the development of USB devices. The device avoids additionally a potential loss in case of 5-meter-connection by means of different rooms and floor connections.


  • Bidirectional communication
  • Short-circuit proof interface
  • Integrated speed selector
  • 5kV insulation voltage
  • ESD (contact) class 3A
  • Transient protection of at least 25kV/μs
  • Doen't need external power supply

USB-Isolator dual port


  • Bidirectional communication
  • 2 independent, downstream connections
  • Upstream device for short-circuit protection
  • Automatic speed selector
  • 5kV insulation voltage
  • ESD (contact) class 3A
  • Transient-common mode rejection immunity of at least 25 kV/µs
  • External power supply with 1 A