Furse lightning protectors for telephone and ISDN lines

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ESP TN/JP, ESP TN/RJ11-2/6, ESP TN/RJ11-4/6, ESP TN/RJ11-6/6

Suitable for use on telephone lines with a maximum (or ringing) voltage of up to 190 volts.
telephone connector, UK & RJ11
For telephone lines with a British style, jack plug and socket, connection use ESP TN/JP.
For telephone lines with RJ11 connections protect the middle 2 (of 6) conductors with ESP TN/RJ11-2/6, the middle 4 (of 6) with ESP TN/RJ11-4/6 or all 6 with ESP TN/RJ11-6/6.

For wire-in applications the high performance ESP TN or ready-boxed derivative ESP TN/BX or ESP TN/2BX, can be used. To protect PBX telephone exchanges and other equipment with LSA-PLUS connections click here.

Application

Use these to protect equipment plugged into a telephone or ISDN socket:

computers and computer modems
faxes, phones and answer machines
dial-up fire/burglar alarms
telemetry equipment.

typical installation to a PC's internal modem

ESP JP RF Brochure

ESP TN/JP Protector

Features and benefits

Controls transient overvoltages to a low level to ensure maximum protection for your equipment.

Provides repeated protection in lightning intense environments.

ESP TN/JP and ESP TN/RJ11-6/6 give protection between all six conductors, so whichever wires your system communicates through you can be sure your equipment is fully protected.

ESP ISDN/RJ45-8/8 gives protection between ll 8 conductors, fully protecting attached equipment no matter which wires the system uses.

Correctly applied, ESP TN/RJ11-2/6, ESP TN/RJ11-4/6 and ESP ISDN/RJ45-4/8 protect all signalling conductors.

Supplied ready for flat mounting.

Sturdy ABS housing.

Simple installation.

Substantial earth stud to enable effective earthing.

Straightforward and comprehensive installation instructions with every unit.

UK Oftel Approval NS/G/1235/W/100025

5 year warranty.

Installation

Connect in series with the telephone line or ISDN line. These units are usually installed close to the equipment being protected and within a short distance of a good electrical earth.

Protector installed showing the short earth connection

connect in series

Electrical specification

	ESP TN/JP	ESP TN/RJ11-2/6	ESP TN/RJ11-4/6	ESP TN/RJ11-6/6	ESP ISDN/RJ45-4/8	ESP ISDN/RJ45-8/8
Max working voltage¹ -Line to line -Line to earth	190V 190V	190V 190V	190V 190V	190V 190V	5V 58V	5V/58V² 58V²
Current rating (signal)	300mA	300mA	300mA	300mA	300mA	300mA
In-line resistance (per line ± 10%)	4.4ohm	4.4ohm	4.4ohm	4.4ohm	4.4ohm	4.4ohm
Bandwidth (-3dB 50ohm system)	>50MHz	>50MHz	>50MHz	>50MHz	>50MHz	>50MHz

1 Maximum working voltage (DC or AC peak) measured at <95µA leakage. Post transient recovery voltage >80V.

Transient specification

	ESP TN/JP	ESP TN/RJ11-2/6	ESP TN/RJ11-4/6	ESP TN/RJ11-6/6	ESP ISDN/RJ45-4/8	ESP ISDN/RJ45-8/8
Let through voltage (all conductors)¹ 5kV,10/700µs test to: BS 6651:1999 Appendix C, Cat C-High ITU (formerly CCITT) IX K17 -Line to line -Earth to earth	200V 200V	200V 200V	200V 200V	200V 200V	27V 80V	27V/80V² 80V
Maximum surge current	10kA	10kA	10kA	10kA	10kA	10kA

1 The maximum transient voltage let-through the protector throughout the test (+/-10%), line to line & line to earth. Response time <10ns.
2 Tested with 8/20µs waveshape to ITU (formely CCITT), BS 6651:1999 Appendix C.The connectors may limit the capability of the protector.

Mechanical specification

	ESP TN/JP	ESP TN/RJ11-2/6	ESP TN/RJ11-4/6	ESP TN/RJ11-6/6	ESP ISDN/RJ45-4/8	ESP ISDN/RJ45-8/8
Temperature range	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C
Connection type	Standard BT jack plug and socket (to BS 6312)	RJ11 plug and socket	RJ11 plug and socket	RJ11 plug and socket	RJ45 plug and socket	RJ45 plug and socket
Earth connection	M6 stud	M6 stud	M6 stud	M6 stud	M6 stud	M6 stud
Weight -unit -packaged	0.15kg 0.2kg	0.15kg 0.2kg	0.15kg 0.2kg	0.15kg 0.2kg	0.15kg 0.2kg	0.15kg 0.2kg
Dimensions