WISCO International (Radiall-Larsen / Lightning Protectors)

Radiall/Larsen Antenna Technologies is proud to introduce a new line of lightning protectors. Lightning protectors are commonly used to protect equipment in wireless communications infrastructure against high power surges of lightning strikes. They should be located as near to the antenna or equipment being protected as possible. Common locations are the top of the mast where the transmission line exits the antenna, and the entrance or inside the cabinet where the transmission line enters the base station electronics.

Lightning protectors from Radiall/Larsen are quarter wave stub and gas discharge technology featuring Radiall’s unique BBR over silver plating. BBR is a non-magnetic material which provides a superior non-tarnishing surface. They can be used in indoor or outdoor applications due to their IP67 water submersion rating. Our standard product offering features N female-type connectors. Options are available with 7/16 DIN connectors. Contact the factory for more information.

R445.Q00.000

Quarter wave stub technology is based on a three-port coaxial device with N female connectors. When lightning strikes, current is instantaneously diverted to the ground through a short circuit mechanism in the stub. The advantages of this technology are no maintenance required and the lowest residual voltage passes through to the equipment.

For use in applications covering 1710-1990 MHz.
Low residual voltage less than 15 Volts.
Band pass filter.
Maintenance free.
Weatherproof to IP 67 standards.
VSWR less than 1.20.
RF power rating (VSWR = 1): 0.8 kW @ 1900 MHz

R445.Q00.001

For use in applications covering 824-960 MHz.
Low residual voltage less than 15 Volts.
Band pass filter.
Maintenance free.
Weatherproof to IP 67 standards.
VSWR less than 1.20
RF power rating (VSWR = 1): 1.2 kW @ 900 MHz

R445.G00.000

Gas discharge tube (GDT) technology with N female connectors works like a voltage filter. When lightning strikes, the voltage across the gas capsule increases. When the voltage reaches the DC sparkover voltage, the gas ionizes and becomes conductive.
At this point, the current diverts through the gas capsule to the ground.
GDT incorporates the use of a field-replaceable gas capsule which must be maintained regularly. The capsule is sold spearately from the GDT lightning protector.

Broadband voltage filter covers DC to 2.5 GHz.
For use with any system requiring protection at frequencies below 824 MHz or above 1990 MHz.
Residual voltage less than 350 Volts reaches the equipment.
Low intermodulation level.
Reduced dimensions - looks like in-line coaxial adapter.
Weatherproof to IP 67 standards.
Can be used with tower mount amplifiers because of DC characteristics.
VSWR less than 1.20.

REPLACABLE GAS CAPSULES FOR R445.G00.000

The choice of which gas capsule to order is based on the senstitivity of the equipment in each application. The most critical characteristics to consider are the discharge current value and the sparkover voltages.
The gas capsule must first be chosen by the maximum voltage the equipment can withstand (ie residual voltage reaching the equipment after passing through the protector and the peak voltage that can reach the equipment prior to protection).
Then it should be chosen by the maximum current which the protector can withstand - either 10 kA or 20 kA.

For your ordering convenience, we also offer the R445.G00.000 with the gas capsule. Use the chart shown below to determine which gas capsule fits your needs then order the right combination using the following part numbers:

Gas Discharge Tube with Gas Capsule

Part Number (=) Gas Discharge Tube (+) Gas Capsule

R445.G00.002 R445.G00.000 R445.999.100

R445.G00.003 R445.G00.000 R445.999.101

R445.G00.004 R445.G00.000 R445.999.102

R445.G00.005 R445.G00.000 R445.999.103

R445.G00.006 R445.G00.000 R445.999.105

Gas Capsule Only

Part Number	DC Sparkover Voltage (V)1	Impulse Sparkover Voltage (V)2	Impulse Discharge Current (kA)3	Glow Discharge Voltage (V)4	Arc Voltage(V)5	Recommended Use
R445.999.100	230 +/- 20%	< 700	10	60	10	Power 20 - 110W
R445.999.101	350 +/- 20%	< 1000	10	75	15	Power 100 - 300W
R445.999.102	90 +/- 20%	< 700	20	60	10	Transmitter or Receiver up to 20W
R445.999.103	230 +/- 20%	< 700	20	60	10	Power 20 - 110W
R445.999.105	350 +/- 20%	< 1000	20	60	10	Power 100 - 300W

Maximum continuous voltage that can reach the equipment through the protector prior to ionizing gas in capsule and diverting voltage to ground.
Maximum peak voltage at 1 kV/ms that can reach the equipment through the protector prior to ionizing gas in capsule and diverting voltage to ground.
Maximum amount of current that the GDT can withstand without damage.
The voltage at which the gas returns from ionized to inert state.
The voltage that will pass through the protector to the equipment once the protector begins diverting the strike to the ground.