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TOHTSU  CZX-3500  Coaxial Relay


SPDT 12 Volt High Specification Coaxial Relay with three "N" Type Female Connectors

Imark Stock # 851461


  • Compact Size
  • Operates up to 6.0 GHz
  • Low Insertion Loss
  • Low VSWR
  • Excellent Isolation
  • High Power Capability
  • 12 Volt Operation


The Tohtsu CZX-3500 is a high specification Coaxial Relay specifically designed for switching RF feed paths in two-way radio 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 "N" Type Female Connectors. Switching is achieved by applying 12 Volts DC to the Coil. The Tohtsu CZX-3500 Coaxial Relays feature low loss, good VSWR, excellent isolation, and high power handling characteristics up to 6 GHz.



Actuation Voltage 10Vdc - 14Vdc (12 Volts DC Nominal)
Current Requirement 250mA @ 12 Vdc 20 C
Coil Resistance 48W 10% 20 C
Switching Time 20mS (Pull In) Max, 18mS (Drop Out) Max
Switching Circuit  
Circuit Type SPDT
Switching Circuit Impedance 50W
Voltage Standing Wave Ratio Less than 1.3:1 @ 6.0GHz
Isolation >65dB @ 50 MHz

>50dB @ 6.0 GHz

Insertion Loss <0.1dB @ 50 MHz

<0.4dB @ 6.0 GHz

Maximum Input Power 2300 Watts (PEP) @ 50 MHz

100 Watts (CW) @ 6.0GHz

Crosstalk 76dB @ 30 MHz to 49 dB @ 1.0 GHz
Connector Type 3 x "N" Type 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 68(W) x 43(D) x 61(H) mm
Shipping Dimensions 78(W) x 100(D) x 60(H) mm
Unit Weight 300 grams
Shipping Weight 335 grams
Imark Stock # 851461


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