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TOHTSU  CX-120P  Coaxial Relay


SPST 12 Volt Coaxial Relay for PCB Mounting

Imark Stock # 851441


  • Compact Size
  • Operates up to 1.0 GHz
  • Low Loss
  • Low VSWR
  • Good Isolation
  • High Power Capability
  • 12 Volt Operation


The Tohtsu CX-120P Coaxial Relay is specifically designed for switching RF feed paths in two-way radio applications, but can also be used in LAN applications. They are designed for PCB mounting. Switching is achieved by applying 12 Volts DC to the Coil. The Tohtsu CX-120P Coaxial Relays feature low loss, good VSWR, good isolation, and high power handling characteristics.



Actuation Voltage 9Vdc - 15Vdc (12 Volts DC Nominal)
Current Requirement 80mA @ 12 Vdc 20 C
Coil Resistance 150W 10% 20 C
Switching Time 20mS (Pull In) Max, 15mS (Drop Out) Max
Switching Circuit  
Circuit Type SPDT
Switching Circuit Impedance 50W
Voltage Standing Wave Ratio Less than 1.4:1 @ 1.0GHz
Isolation >60dB @ 50 MHz

>29dB @ 1.0GHz

Insertion Loss <0.05dB @ 50 MHz

<0.25dB @ 1.0 GHz

Maximum Input Power 250 Watts @ 50 MHz

150 Watts @ 1.0GHz

Crosstalk 60dB @ 30 MHz to 27 dB @ 1.0 GHz
Connector Type PCB Pins
Mechanical & Physical  
Life Expectancy 1,000,000 Operations Minimum
Operational Temperature -50 C to +70 C
Mounting Requirements PCB Mounted
Overall Unit Dimensions 35(W) x 23(D) x 35(H) mm
Shipping Dimensions 80(W) x 110(D) x 38(H) mm
Unit Weight 70 grams
Shipping Weight 110 grams
Imark Stock # 851441


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