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IC-U400 - Mobile UHF Radio


Quick Specs
Mobile UHF Transceiver
RX/TX: 400-430 MHz or 450-480 MHz or 480-520 MHz (three versions)
Output power: 35 W
Modes: FM
Receiver sensitivity: 0.35 µV (FM, 12 dB SINAD)
CTCSS standard
2-tone optional (see detailed specifications)


Detailed Specifications


  • Frequency Coverage:
    400~430 MHz (Low-band version)
    450~480 MHz (Middle-band version)
    480~520 MHz (High-band version)
  • Channel spacing: 25 kHz
  • Number of channels: 16
  • Mode: FM (16K0F3E) (8K50F3E for narrow type)
  • Antenna impedance: 50 ohms (unbalanced)
  • Power Supply Requirement: 13.8 V DC ±15% (negative ground)
  • Current drain (at 13.8 V DC):
    Transmit: 10.5 A
    Receive (squelched): 500 mA
    Receive (max. audio power): 1.2 A
  • Usable Temperature Range: -30°C to +60°C; -22°F to +140°F
  • Frequency stability: ±0.0005% (-30°C ~ +60°C)
  • Dimensions (projections not included): 170(W) x 50(H) x 260(D) mm; 6.7(W) x 2.0(H) x 10.2(D) in
  • Weight: 2.6 kg; 5.7 lb


  • Output power: 35 W
  • Modulation system: Variable reactance frequency modulation
  • Max. frequency deviation: ±5.0 kHz
  • Spurious emissions: -70 dB
  • Harmonic emissions: -70 dB
  • Microphone impedance: 600 ohms


  • Receive system: Double-conversion superheterodyne
  • Modulation acceptance: ±7 kHz
  • Intermediate frequencies:
    1st: 21.8 MHz
    2nd: 455 kHz
  • Sensitivity (for 12 dB SINAD): 0.35 µV
  • Squelch sensitivity (threshold): 0.5 µV
  • Adjacent channel selectivity: -70 dB (-60 dB for narrow type)
  • Intermodulation rejection: -70 dB
  • Spurious and image rejection: -70 dB
  • Audio output power: 5 W with a 4 ohms load.(4 W for narrow type)
  • Audio output impedance: 4 ohms

IC-U400 Options

Some versions cannot use all the options listed below since type approval for the IC-U400 varies between countries. Ask your Icom dealer which options are available.
  • CK-12 REMOTE CABLE KIT: Allows you 6 m (19.7 ft) separate installation of your IC-V100 front panel and main body in the vehicle.
  • HG-10 MICROPHONE HANGER BOX: Provides monitoring when operating with the tone squelch function even if the microphone is left hanging on the microphone hanger.
  • HM-37 DTMF MICROPHONE: Heavy-duty hand microphone with DTMF keyboard.
  • HM-38 HAND MICROPHONE: Heavy-duty hand microphone.
  • IC-PS30 AC POWER SUPPLY: Allows you to use the IC-V100 through AC power source. Equipped with a DC power cable and 3 extra DC output connectors. Output voltage: 13.8 V; Max. current drain: 25 A
  • SP-5 EXTERNAL SPEAKER: Can be easily installed in any part of your vehicle. The same type as supplied with the IC-V100. Input impedance: 4 ohms. Max. input power: 5 W
  • SP-10 EXTERNAL SPEAKER: Compact and easy-to-install. Input impedance: 4 ohms. Max. input power: 5 W
  • UT-26 2-TONE DECODER UNIT: A 2-tone system receives only specific stations and provides a "personalized" squelch.
  • UT-27 2805 Hz TONE DECODER UNIT: Allows you to receive only specific stations using 2805 Hz tones.
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