Only One Name Means ProTek’Tion™

www.protekdevices.com

05050.R4 12/10

Page 2

TEL185B - TEL185E

TyPICAL DEvICE CHARACTERIsTICs

PARAMETER

syMBOL

vALuE

uNITs

Peak Operating Line Voltage

V

OP

±185

Volts

Operating Line Current

I

O

200

mA

Transient Voltage

-

20

kV/Wire

Transient Current - 8/20µs waveform

-

10

kA/Wire

Transient Current - 8/20µs waveform

-

40

kA/Protector

Operating Temperature

T

A

-55 to 100

°C

Storage Temperature

T

STG

-55 to 100

°C

Response Time

-

< 1

ns

PART

NuMBER

MAXIMuM

CLAMPING

vOLTAGE

(8/20µs)

@ ±500A

v

C

vOLTs

MAXIMuM

LINE

THROuGHPuT

REsIsTANCE

R

OHMs

MAXIMuM

LEAKAGE

CuRRENT

@ ±185v

OP

I

D

µA

MAXIMuM

CAPACITANCE

@ 0v, 1MHz

C

pF

TEL185B/E

330

12

5

800

INsTALLATION INsTRuCTIONs

There are five (5) terminals on both the line and equipment side of the TEL185E - four telcom line terminals and one ground terminal. The ground terminal, as shown

on the label, is connected internally. A single ground connection is sufficient. However, it is recommended that both ground connections be used for a lower imped-

ance path to earth. This connection can be made through the green AC power ground wire or a known earth ground. The ground wire should be #14 stranded wire.

Incoming telcom lines are cut or disconnected from the equipment to insert the TEL185E product. The line side of the terminals are to be connected to outside

telephone or telecommunication lines that carry the transient threats into the equipment to be protected. The equipment side of the terminals are to be connected

to the equipment to be protected. The location of the product should be such that these wires are as short as possible. A #18 or 20 gauge wire can be used for these

connections.

The TEL185B requires an edge connector interface for installation. A standard 15 position edge connector can be used. When mounting or wiring the connectors onto

a printed circuit board, be sure that the correct terminals are soldered. The line side of the board connections are finger contacts 2 thru 5. The boards are conformal

coated for limited protection against moisture.

ProTek’s telcom line protector is designed with a short circuit failure mode to give maximum protection. A fuse, PTC, fusible link, or circuit breaker is recommended for

each signal line on the input (line) side of the protector for those applications that require an open circuit failure mode.

Caution: A low DC resistance ground may not be indicative of a good lightning ground. Lightning contains a broad spectrum of frequencies - up to 1 MHz. A low

impedance path to ground at the transient frequencies is necessary. A ground strap is recommended or a #6 AWG stranded wire. For wire lengths over 1.5 meters,

there may be some excessive line to earth potential under severe thunderstorm conditions. For these applications, an additional protector may be necessary at the

equipment interface.