Agilent / Keysight 34937A 32-Channel FormC/Form A General Purpose Switch for 34980A

The Keysight 34937A is a 32-channel general-purpose switch module for the 34980A Multifunction Switch/Measure Unit. It combines 28 Form C (SPDT) relays rated at 1 A and 60 W, with 4 Form A (SPST) relays rated at 5 A and 150 W, delivering flexible signal routing for automated test and data acquisition systems. Latching armature relays with integrated relay counters and temperature monitoring enable reliable operation across demanding test environments.

Technical Specifications

• 28 Form C channels: 1 A switching/carrying current, 60 W power handling, ±300 V (DC/AC)


• 4 Form A channels: 5 A switching/carrying current, 150 W power handling, 30 VDC / 250 VAC Electrical Performance


• Contact offset voltage: <3 µV


• Initial closed channel resistance: <1.5 Ω


• Bandwidth at terminal block: 30 MHz


• Channel-to-channel crosstalk: -65 dB at 1 MHz, -30 dB at 20 MHz


• Capacitance (high-low): 50 pF


• Capacitance (low-earth): 80 pF Relay Specifications


• Type: Latching armature relays with integrated relay counter


• Relay life: 1×10⁸ cycles at low load, 5×10⁵ cycles at rated load


• Simultaneous channel switching supported

Key Features

• Integrated temperature sensor for overheating detection


• 50-pin D-sub connectors with compatibility for terminal blocks and mass interconnect solutions


• Optional 34937T Terminal Block accessory for discrete wiring


• Plug-in module format for 34980A mainframe integration

Typical Applications Cycling power to products under test, controlling indicator and status lights, and actuating external power relays and solenoids.

Compatibility & Integration Designed exclusively for the Keysight 34980A Multifunction Switch/Measure Unit.