• Effective Against Lightning, Inductive Switching and ESD
Industry
Standard Low
Capacitance TVS
Protector
100
ProTek Device
10
0
MECHANICAL CHARACTERISTICS
• Approximate Weight: 142 grams
• Flammability Rating UL 94V-0
1
2
3
4
v
(OP)
- Circuit Operating - volts
5
05039.R4 12/10
Page 1
www.protekdevices.com
05039
Only One Name Means ProTek’Tion™
485ELC
TyPICAL DEvICE CHARACTERISTICS
MAXIMuM RATINGS
@ 25°C unless Otherwise Specified
PARAMETER
Peak Operating Line Voltage
Operating Line Current
Transient Voltage
Transient Current - 8/20µs waveform
Transient Current - 8/20µs waveform
Operating Temperature
Storage Temperature
Response Time
SyMBOL
V
OP
I
O
-
-
-
T
A
T
STG
-
vALuE
±7
250
20
10
40
-55 to 100
-55 to 100
<1
uNITS
Volts
mA
kV/Wire
kA/Wire
kA/Wire
°C
°C
ns
ELECTRICAL CHARACTERISTICS PER LINE
@ 25°C unless Otherwise Specified
PART
NuMBER
MAXIMuM
CLAMPING
vOLTAGE
(8/20µs)
LINE-LINE/LINE-GND
@ 500A
v
C
±vOLTS
20.0
MAXIMuM
LINE
THRuPuT
RESISTANCE
R
OHMS
12
MAXIMuM
LEAKAGE
CuRRENT
@ 7v
OP
I
D
µA
10
MAXIMuM
CAPACITANCE
@ 0-7v, 1MHz
C
pF
25
485ELC
05039.R4 12/10
Page 2
www.protekdevices.com
05039
Only One Name Means ProTek’Tion™
485ELC
PACKAGE INFORMATION
INSTALLATION INSTRuCTIONS & DIAGRAM
This product should be located as close as possible to the equipment being protected. A low impedance grounding system is important to maintain a low clamping
voltage between the line-to-ground connection.
There are five (5) terminals on both the line and equipment side of the 485ELC - four data line terminals and two ground terminals. Both ground terminals, as shown
on the label, are 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 data lines are cut or disconnected from the equipment to insert the 485ELC product. The line side of the terminals are to be connected to data lines from
the outside world or lines that carry the transient threats into the equipment to be protected. The equipment side of the terminals are to be connected to the equip-
ment 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 connec-
tions.
ProTek’s data line protector is designed with a short circuit failure mode to give maximum protection. A fuse, fusible link, or circuit breaker is recommended for each
data/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.
UNPROTECTED SIDE
1
2
GND
3
4
PROTECTED SIDE
1
2
GND
3
4
(Line Input Terminal)
Data Line from Outside World
Earth Ground
Note:
Both ground terminals are common. Use second ground wire
to reduce impedance on long runs to earth ground connections.
Earth Ground
(Equipment Terminal)
To Transmit/Receive Circuits
05039.R4 12/10
Page 3
www.protekdevices.com
05039
Only One Name Means ProTek’Tion™
485ELC
PACKAGE INFORMATION
OuTLINE DIMENSIONS
DIM
A
B
C
D
E
F
MILLIMETERS
MIN
-
82.22
-
-
-
-
INCHES
MIN
-
3.235
-
-
-
-
MAX
95.5
82.98
57.2
30.2
15.5
30.2
MAX
3.8
3.265
2.25
1.125
0.61
1.19
A
B
WARNING
LINE
GND
3
4
D
1
1
Adhesive Mylar Label
Terminal Screw
2
4
3
EQUIPMENT
GND
2
C
Mounting Hole
for #8 Screw
Terminal Strip
#6 Screws
F
E
ORDERING INFORMATION
BASE PART NuMBER
485ELC
MARKING
Logo, Date Code, Terminal Designations and Part Number
05039.R4 12/10
Page 4
www.protekdevices.com
05039
Only One Name Means ProTek’Tion™
485ELC
COMPANy INFORMATION
COMPANy PROFILE
ProTek Devices, based in Tempe, Arizona USA, is a manufacturer of Transient Voltage Suppression (TVS) products designed specifically for
the protection of electronic systems from the effects of lightning, Electrostatic Discharge (ESD), Nuclear Electromagnetic Pulse (NEMP), in-
ductive switching and EMI/RFI. With over 25 years of engineering and manufacturing experience, ProTek designs TVS devices that provide
application specific protection solutions for all electronic equipment/systems.
ProTek Devices Analog Products Division, also manufactures analog interface, control, RF and power management products.
SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice.
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 makes no warranty, representation or guarantee regarding the suitability of
its products for any particular purpose, nor does ProTek assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability without limitation special,
consequential or incidental damages.
LIFE SUPPORT POLICY: ProTek Devices products are not authorized for use in life support systems without written consent from the factory.
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