By: Nitek
Video Transmission Solutions
Contact us for lowest price (800) 284-2288, (858) 565-1101,, or fax (858) 300-4193
Video & Power Balun Combiner

The Nitek Video and power balun combiner provides video and camera power over a single CAT5 for CCTV twisted pair video transmission up to 750 feet (225 meters) in conventional UTP analog Video applications, 100 meters in TIA/EIA 568 applications.

The VB31AT is a unique UTP power and video balun which provides an economical means of sending video and camera power over a standard category cable. Video is sent over one pair and camera power is sent over two of the remaining pairs. A mini-coax pigtail with male BNC is used on the VB31AT. A pair of wires are provided for power connection. Connections to the Category cable are made via an RJ45 connector.

The VB31AT passive UTP power and video balun combiner provides the same high immunity to noise and interference as all of the Nitek baluns for CCTV transmission. This simplified wiring scheme provides a convenient method of powering the camera and allowing for quicker and easier installations. The RJ45 modular jack uses standard 568B wiring so spare network cables can be used. The VB31AT is a UTP transceiver that provides another Security Transmission Solution from Nitek.

VB31AT features include:

  • Superior video over ordinary twisted pair cable
  • Immunity to noise and interference
  • Lifetime warranty
  • Built-in surge suppression
  • Passive devices - do not require power
  • Convenient connection to Category cables for video and power
  • Easier to install than coax

 Transceiver Unit

 Size w/mounting tabs

 0.9"H x 1.0"W x 2.0"D

 Power Requirements


 Power Pass Through

 250mA @ 1,000 feet (300 meters) on 24 AWG
1 Amp @ 100 feet (30 meters) on 24 AWG

 Video Input

 1 vpp composite video
monochrome or color


 Balanced low voltage current loop

 Modular Jack

 Standard RJ45


 Video Format

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

 0 degrees C to +85 degrees C

 Humidity Range

 0 to 98%, non-condensing

 Twisted Pair Connection

 RJ45 modular connector

 Transient Immunity


 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



 100 Ohms +/- 20%

 UTP Category

 2 or better


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Prices and specifications subject to change without notice.