Datasheet TEL50E, TEL50B Datasheet (PROTEK)

05049

TEL50B

&

. . . engineered solutions for the transient environment™

PBX LOW VOLTAGE TELEPHONE PROTECTOR

APPLICATIONS

✔ Telcom Terminal Equipment
✔ Data/Telcom Interfaces
✔ Dedicated Fax & Modems

IEC COMPATIBILITY (EN61000-4)

✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
✔ 61000-4-4 (EFT): 40A - 5/50ns
✔ 61000-4-5 (Surge): 8/20µs - 95A, L5(Line-Gnd)

FEATURES

✔ Designed for ±50 Volt (Peak) Telephone Lines
✔ 4 Wire, Line-to-Ground Protection
✔ Permanent Two-Stage Protection
✔ Subnanosecond Response Time
✔ Automatic Reset - Does Not Interupt Service
✔ Effective Against Lightning, Inductive Switching and ESD

TEL50E

TEL50B

TEL50E

MECHANICAL CHARACTERISTICS

✔ Weight: TEL50E - 142 grams, TEL50B - 28 grams (Approximate)
✔ Flammability Rating UL 94V-0
✔ Device Marking: Logo, Part Number & Terminal Designations

DESCRIPTION

The TEL50B/E is a two-stage transient voltage protector that provides primary
and secondary protection against lightning, inductive switching and electro­static discharge (ESD) transient threats. The first stage diverts the transient
current through the ground terminal return path and the second stage clamps
the voltage to a safe level without interuption of service.

The TEL50B/E is designed to protect telcom lines from common mode (line-to­ground) transients. There are four (4) independent lines referenced to the
ground terminals.

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DEVICE CHARACTERISTICS

TEL50B

&

TEL50E

MAXIMUM RATINGS @ 25°C

Peak Operatiing Line Voltage (VOP)
Operating Line Current (I

)

O

Maximum Transient Voltage
Maximum Transient Current

(8/20µs waveform)
Operating & Storage Temperature
Response Time

INSTALLATION INSTRUCTIONS

There are five (5) terminals on both the line and equipment side of the
TEL50E - 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 impedance 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 to cut or disconnected from the equipment to
insert the TEL50E 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.

±50V

PEAK

200mA
10kV
10kA/Wire
40kA/Protector

-55°C to 100°C
< 1 nanosecond

ELECTRICAL CHARACTERISTICS @ 25°C

MAXIMUM

CLAMPING

VOLTAGE

(8/20µs)

MAXIMUM

LINE

THRUPUT

RESISTANCE

@ ±500A

V

C

VOLTS

R

OHMS

95 12 5 800

The TEL50B requires an edge connector interface for installation. A
standard 15 position edge connector can be use. 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, fussable 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.

MAXIMUM

LEAKAGE
CURRENT

@ ±185V

I

D

µA

MAXIMUM

CAPACITANCE

@ 0V, 1MHz

OP

C

pF

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PACKAGE OUTLINE & DIMENSIONS

TEL50E CASE OUTLINE TEL50B BOARD OUTLINE

TEL50B

&

TEL50E

1.125”

(30.2mm)

Adhesive Mylar Label

0.61” MAX
(15.5mm)

3.8” MAX
(95.5mm)

3.25”±0.015”

(82.6mm±0.38mm)

WARNING:

EQUIPMENT

124 GND3

Terminal Screw

#6 Screws

Terminal Strip

0.50” MAX (12.7mm)

3.0” MAX

(76.2mm)

LINE

21 4GND 3

2.25” MAX
(57.2mm)

Mounting
Hole for #8
Screw

1.19” MAX
(30.2mm)

EQUIPMENT

030” MAX

(7.6mm)

OUTPUT Connected to
Transmit/Receive Circuits

Note:

I/O contacts spaced at 0.156”
(3.96mm) centers.

Orientation Notch

5

2

GND

15

12

0.07”

(17.8mm)

1.90” MAX

LINE

(48.2mm)

CONTINUITY

INPUT OUTPUT

12
13
14
15

INPUT Connected to Line From
Outside World

5
4
3
2

ProTek Devices
2929 South Fair Lane, Tempe, AZ 85282
Tel: [phone] Fax: [phone]

E-Mail: [e-mail]
Web Site: www.protekdevices.com

COPYRIGHT © ProTek Devices 2003

SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except JEDEC).
DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer’s and that in furnishing
engineering and technical assistance, ProTek assumes no responsibility with respect to the selection or specifications of such products.

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