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Key Features & Specifications

  • LXI compliance includes built-in Ethernet connectivity
  • Fully-featured graphical web interface
  • 28 Form C channels up to 1A, 50W
  • 4 Form A channels up to 5A, 150W
  • Armature latching relays, Relay counter
  • Temperature sensor for overheating conditions
  • Simultaneous channel switching
  • Software drivers for most common programming environments


The Keysight L4437A is a general-purpose switch that has 28 independent single-pole, double-throw (SPDT) 1A relays and 4 single-pole, single-throw (Form A) 5A relays. These switches can be used to cycle power to products under test, control status lights, and actuate external power relays and solenoids. The Form C channels are 300V, 1A contacts and can handle up to 50W, and the Form A channels are 30VDC/250VAC, 5A contacts and can handle up to 150W.

Standard 50-pin Dsub connectors allow for use with standard cables, terminal block, or mass interconnect solutions.

Also consider the 34980A 8-slot switch/measure unit that allows you to mix and match different modules into a low-cost, compact solution. Click here.