Transient Protectors for Coaxial RF Systems

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Suitable for RF systems using coaxial cables at frequencies between 50 MHz and 2.7GHz.
Effective protection without impairing system performance.
Suitable for power up to 150W.

For coaxial (or twisted pair) CCTV lines use the ESP CCTV models. For coaxial ethernet lines use the ESP Thin/ThickNet models and for CATV systems using the F connector the ESP CATV/F.

Application

Use on coaxial cables to protect RF transmitter and receiver systems, including electronics located at the antenna or dish. Typical examples include cell sites, military communications, satellite earth stations, pager systems and emergency services communications systems.

Features and benefits

Restricts let-through voltage to below the damage levels of interface circuitry.

Superior transient protection to both gas Discharge Tube (GDT) and Quarter Wave Stub (QWS) based protectors.

Provides repeated protection in lightning intense environments.

Low attenuation and near unity Voltage Standing Wave Ratio (VSWR) over a wide range of frequencies ensure the protectors do not impair system performance.

Wide bandwiidth means a single product is suitable for a range of applications.

Available with N, 7/16 DIN and BNC connectors.

Easily mounted and earthed via via fixtures on the base of the unit that accept M3 and M5 screws.

Additional mounting plates - ESP RF BK1 (straight) and ESP RF BK2 (90deg angled) - give increased flexibility in mounting methods.

Robust metal housing.

ESP RF installation
ESP RF 111A11 installed on a coaxial cable running between an antenna and an RF receiver.

Installation

In a building, connect in series with the coaxial cable near where it enters or leaves the structure, or close to the equipment being protected. This should be close to the system's earth star point (to enable a good connection to earth). On a mast, connect in series with the coaxial cable near the antenna /dish being protected. Install in a radio communications room, an existing cabinet or suitable enclosure.

ESP RF 111A11

ESP RF AA1A11

ESP RF 441A11

Suitable Accessories

Additional mounting plates - ESP RF BK1 (straight) and ESP RF BK2 (90deg angled) - are available.

ESP RF Brochure

ESP RF DC Brochure

Electrical Specification

	ESP RF 111A11	ESP RF AA1A11	ESP RF 441A11
Maximum working voltage (RMS)	86V	86V	86V
Characteristic impedance	50ohms	50ohms	50ohms
Bandwidth	50-2700MHz	50-2700MHz	50-2700MHz
Voltage standing wave ratio	<1.2	<1.2	<1.2
Insertion loss over bandwidth	0.2dB	<0.2dB	0.2dB
Maximum power	150W	150W	150W

Transient Specification

	ESP RF 111A11	ESP RF AA1A11	ESP RF 441A11
Let-through voltage (all conductors)š 5kV, 10/700ľs test to: BS 6651:1999 Appendix C, Cat C-High ITU (formerly CCITT) IX K17	20V	20V	20V
Maximum surge current˛	10kA	10kA	10kA

1 The maximum transient voltage let-through the protector throughout the test (+/-10%). Response time <10ns. This let-through voltage represents a deviation from the applied signal voltage , present at the time of the test.
2 Tested with 8/20ľs waveshape to ITU (formely CCITT), BS 6651:1999 Appendix C.

Mechanical Specification

	ESP RF 111A11	ESP RF AA1A11	ESP RF 441A11
Temperature range	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C
Connection type	N female	7/16 DIN female	BNC female
Earth connection	Via mounting fixtures	Via mounting fixtures	Via mounting fixtures
Finish	Silver	Silver	Silver
Weight -unit -packaged	150g 180g	240g 270g	120g 150g

Dimensions

ESP RF Brochure

ESP RF DC Brochure