Nitek CCTV Video Balun - VB39M

Video Balun with Surge Suppression - for UTP Cables

Model Number: VB39M

  • Video Balun Transceiver for Unshielded Twisted Pair
  • Up to 750 feet (225 meters) with Passive Transceivers
  • Up to 3,000 feet (900 meters) with Active Receivers
  • Screw Terminals connect UTP
  • The VB39M is a passive UTP video balun for twisted pair transmission of CCTV video. The VB39M is a "heavy duty" design with two screw terminals for UTP connection and a female BNC for coax connection. The VB39M has built-in surge suppression for added equipment protection.

    The VB39M video balun is a transceiver that provides a low cost means of sending live video over unshielded twisted pair, point-to-point wiring for distances of up to 750 feet (228 meters), with other CCTV balun transceivers, up to 1,500 feet (450 meters) with the TR515 single channel receiver and model 51 series hubs, up to 3,000 feet (900 meters) with the TR560 single channel receiver and 56 series hubs. The VB39M is compatible with all of the up-the-coax control systems.

    A basic system uses (2) VB39 units, one at each end of a twisted pair of wires. These units are intended for use over existing in-house telephone wiring, Category 5 wiring or other twisted pair cable runs to provide a convenient, cost-effective alternative to coax.

    The VB39M is designed to provide superior immunity from noise and interference even when running next to line power. The VB39M also provides a convenient mounting tab for ease of installation. The VB39M is a UTP transceiver that provides another Security Transmission Solution from Nitek.

    • Quality video over ordinary twisted pair cable
    • Built-in surge suppression
    • Built-in ground loop isolation (When used with an active receiver)
    • DIP switches for accurate gain and loss control
    • High immunity to noise and interference
    • LEDs to indicate video detection
    • Highly compact, only one rack unit in height
    • Easy to install and configure
    • Video can be run in the same cable with telephone, computer signals and power


    • Intra-building CCTV installations (instead of coaxial cable)
    • Structured cabling (Category 5) environments
    • To eliminate requirement for Plenum Coax
    • Multi-camera applications through conduit (more cameras through a smaller diameter)


    Two VB37 devices, M or F, in any combination are required for transmission over a single UTP.

    Wire and Cable Recommendations

    The VB37 and VB39 are recommended for use with unshielded twisted pair (UTP) wiring. The systems will operate over wire gauges from 26 AWG through 12 AWG. Category 2, 3, 4 or 5 cable may be used. Individually shielded pairs should be avoided, as they drastically reduce the operating range of the systems. Multi-pair cable with an overall shield is acceptable.

    Video can be operated in the same communication cable coexistent with telephone, computer, control signals, power voltages and other video signals. While video may be routed through telephone punch-down block terminals, any bridge-taps, also called T-taps and any resistive, capacitive or inductive devices MUST BE removed from the pair.

    For more specific information regarding wire types, gauges and proper installation techniques, please call (800) 528-4343 for technical assistance.
     Transceiver Unit
    Size 1.3" (H) x 2.0" (W) x .95" (D)
    Power Requirements NONE REQUIRED
    Input 1 vpp composite video
    Monochrome or Color
    Output Balanced low voltage current loop
    Shipping Weight 1 lb for single unit
     System (2 Transceivers Required)
    Video Format RS170, NTSC, PAL, SECAM, CCIR (Color or B/W)
    Video Input 1 vpp composite video monochrome or color
    Operating Frequency DC to 10 MHz
    Common Mode Rejection >60 dB typ.
    Temperature Range -40 degrees C to +85 degrees C
    Humidity Range 0 to 98%, non-condensing
    Transient Immunity

    400A V 1.2uS x 50 uS
    per ANSI / IEE 587 C62.41 B3
    400A 8uS x 20 uS
    when ground screw terminal is
    connected to earth-ground

    Enclosure Material Black ABS flame retardant plastic
    Twisted Pair Connection Screw terminals
    Wire Spec 26 to 12 AWG Unshielded Twisted Pair (UTP)
    DC Loop Resistance 51 Ohms/1,000 feet (max) (51 Ohms/300 meters)
    Normal Capacitance 17pF/ft.
    Impedance 100 Ohms +/- 20%
    UTP Category 2 or better

    Select a type of online documentation:

    VB39M Specification Sheet
    VB39M Installation Manual
    VB39M A&E Specification
    VB39M A&E Specification
    VB39M Visio Drawing
    VB39M Autocad Drawing