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TOHTSU  CX-540D  Coaxial Relay


SPDT 12 Volt Coaxial Relay with three BNC Female Connectors

Imark Stock # 851405


  • Compact Size
  • Operates up to 2.0 GHz
  • Low Insertion Loss
  • Low VSWR
  • Good Isolation
  • High Power Capability
  • 12 Volt Operation


The Tohtsu CX-540D 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 internal fitment within radio equipment but can be remotely mounted nearer the antenna if required. It is fitted with three BNC Female Connectors. Switching is achieved by applying 12 Volts DC to the Coil. The Tohtsu CX-530D Coaxial Relays feature low loss, good VSWR, and good isolation characteristics



Actuation Voltage 9Vdc - 16.5Vdc (12 Volts DC Nominal)
Current Requirement 160mA @ 12 Vdc 20 C
Coil Resistance 75W 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 1.2:1 @ 2.0GHz
Isolation >65dB @ 50 MHz

>39dB @ 2.0GHz

Insertion Loss <0.1dB @ 50 MHz

<0.25dB @ 2.0 GHz

Maximum Input Power 350 Watts @ 50 MHz

150 Watts @ 2.0GHz

Crosstalk 76dB @ 300 MHz to 49 dB @ 1.0 GHz
Connector Type 3 x BNC Female Connectors
Mechanical & Physical  
Life Expectancy 1,000,000 Operations Minimum
Operational Temperature -50 C to +70 C
Mounting Requirements 4 pieces M3 Screws (Not Supplied)
Overall Unit Dimensions 58(W) x 52(D) x 53(H) mm
Shipping Dimensions 108(W) x 78(D) x 70(H) mm
Unit Weight 230 grams
Shipping Weight 255 grams
Imark Stock # 851405


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