TEL50B
&
TEL50E
1
05049.R3 11/03
www.protekdevices.com
PBX LOW VOLTAGE TELEPHONE PROTECTOR
Only One Name Means ProTek'TionTM
APPLICATIONS
Telcom Terminal Equipment
Data/Telcom Interfaces
Dedicated Fax & Modem
IEC COMPATIBILITY (EN61000-4)
61000-4-2 (ESD): Air - 15kV, Contact - 8kV
61000-4-4 (EFT): 40A - 5/50ns
61000-4-5 (Surge): 8/20s - 95A, Level 4 (Line-Gnd) & 48A, Level 4 (Line-Line)
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 Interrupt Service
Effective Against Lightning, Inductive Switching and ESD
MECHANICAL CHARACTERISTICS
Weight: TEL50B - 28 grams & TEL50E - 142 grams (Approximate)
Flammability Rating UL 94V-0
Device Marking:
Case - Logo, Terminal Designations & Part Number
Board - Logo, Date Code & Part Number
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 interruption of service.
The TEL50B/E is designed to protect telcom lines from common mode (line-to-
ground) transients. There are four (4) independent lines referenced to the ground
terminals.
05049
TEL50E
TEL50B
2
www.protekdevices.com
05049.R3 11/03
TEL50B
&
TEL50E
DEVICE CHARACTERISTICS
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 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.
The TEL50B 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, 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 frequen-
cies 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 RATINGS @ 25C
MAXIMUM
CLAMPING
VOLTAGE
(8/20s)
@ 500A
V
C
VOLTS
MAXIMUM
LEAKAGE
CURRENT
@ 50V
OP
I
D
A
MAXIMUM
CAPACITANCE
@ 0V, 1MHz
C
pF
Peak Operatiing Line Voltage (V
OP
)
Operating Line Current (I
O
)
Maximum Transient Voltage
Maximum Transient Current
(8/20s waveform)
Operating & Storage Temperature
Response Time
ELECTRICAL CHARACTERISTICS @ 25C
50V
PEAK
200mA
10kV
10kA/Wire
40kA/Protector
-55C to 100C
< 1 nanosecond
MAXIMUM LINE
THRUPUT
RESISTANCE
R
OHMS
95
12
5
800
3
www.protekdevices.com
05049.R3 11/03
TEL50B
&
TEL50E
PACKAGE OUTLINE & DIMENSIONS
0.50 MAX (12.7mm)
3.0 MAX
(76.2mm)
1.90 MAX
(48.2mm)
EQUIPMENT
LINE
CONTINUITY
INPUT
OUTPUT
5
4
3
2
12
13
14
15
INPUT Connected to Line From
Outside World
0.07 MAX
(17.8mm)
12
15
GND
2
5
OUTPUT Connected to
Transmit/Receive Circuits
0.30 MAX
(7.6mm)
Note:
I/O contacts spaced at 0.156
(3.96mm) centers.
Orientation Notch
EQUIPMENT
1
2
4
GND
3
2
1
4
GND
3
W
A
RNING:
LINE
3.8 MAX
(95.5mm)
3.25 0.015
(82.6mm 0.38mm)
1.125 MAX
(30.2mm)
Adhesive Mylar Label
Terminal Screw
2.25 MAX
(57.2mm)
Mounting
Hole for #8
Screw
1.19 MAX
(30.2mm)
#6 Screws
Terminal Strip
0.61 MAX
(15.5mm)
TEL50E CASE OUTLINE
TEL50B BOARD OUTLINE
COPYRIGHT ProTek Devices 2005
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.
ProTek Devices
2929 South Fair Lane, Tempe, AZ 85282
Tel: 602-431-8101 Fax: 602-431-2288
E-Mail:
sales@protekdevices.com
Web Site:
www.protekdevices.com
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