SPDT Coaxial Switch




Part Number : 401-2808-ROHS

The 401-Series part number 401-2808-ROHS SPDT coaxial switch switch is ideal for DC to 18GHz applications with 1.35 @ 18GHz VSWR performance and 50 Ohm impedance. It features failsafe actuator, 24 VDC coil voltage, and SMA female connector, and it requires 20V ~ 28V voltage supply. Additionally, it has DC to Coils drive circuit options, no indicators and no special options.s.

Product Specifications

Frequency GHZ



Isolation dB


Insertion Loss dB


Coil Voltage

Circuit Options

Actuator Type





DC to 18GHz

1.35 @ 18GHz

60dB @ 18GHz


24 VDC

DC to Coils


no indicators

SMA female

-25°C ~ 65°C

Additional Specifications

  • Switching Time:
    15 ms maximum
  • Mechanical Life Cycles*:
    1,000,000 minimum
    5,000,000 minimum (“U” Option
  • Vibration, Operating:
    10G RMS, 20-2000 Hz
  • Mechanical Shock, Non-Operating:
    30G, 1/2 Sine, 11 ms

* Performance and weight varies depending on selected options. Values listed
are for Standard 401 Failsafe model.

IEEE Frequency Bands

HF-Band VHF-Brand UHF-Band L-Band

S-Band C-Band X-Band Ku-Band


Defense Aerospace Communications GPS ATE


Featured Brand

Founded in 1945, Dow-Key is the oldest continuously operating RF switch manufacturer in the United States. We employ our decades of experience to deliver the world’s most innovative switching components, specializing in the design and manufacture of customized, high-performance coaxial switches, waveguide switches and high-reliability (space) switches, including T-switches and switch blocks.

As the world’s largest manufacturer of electromechanical RF switches and devices, Dow-Key remains committed to providing unparalleled customer service, competitive pricing, on-time delivery, and enduring product quality.

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