05017
CX12
thru
. . . engineered solutions for the transient environment™
CX12LC
COAXIAL PROTECTOR
APPLICA
TIONS
✔
High Speed Video Camera
✔
Coaxial Ethernet
✔
High Speed Data Lines
Surgebuster
®
IEC COMPA
TIBILITY
(EN61000-4)
✔
61000-4-5 (Surge): 24A, 8/20µs - Level 2(Line-Gnd) & Level 3(Line-Line)
FEA
TURES
✔
Meets IEC 1000-4-5 Industry Requirements
✔
BNC Connection
✔
Low Capacitance
✔
Completely Enclosed Aluminum Housing
✔
Low Clamping Voltage
✔
Nanosecond Response Time
✔
Long Life and Maintenance Free
✔
Finger Safe Connectors
CX12 PACKAGE
MECHANICAL CHARACTERISTICS
Current - Amperes
FIGURE 1
TRANSIENT VOLTAGETHREAT
CONDITION
2K
✔
Metal Package
✔
Weight 161 Grams (Approximate)
✔
Device Marking: Part Number, Logo
1K
DESCRIPTION
The CX12 series is a two stage, hybrid surge protector designed to protect interfacing equipment from
induced lightning or switching transients. The multistage technique has proven to be the most cost
effective and reliable method for protecting sensitive electronic equipment. Employing state-of-the-art
avalanche junction diode technology, these devices provide superior performance for video, Ethernet,
Token Ring or other LAN interface systems. They are in-line modules with easy interconnecting terminals. A
completely enclosed aluminum housing provides EMC shielding to meet industry standard requirements.
The enclosure has two female BNC type connections for easy installation. The case is ground for those
installations that require external ground connections.
FIGURE 3
LINEAR VS NON-LINEAR CAPACITANCE
1000
I
PP
- Peak Pulse Current - % of I
PP
Industry Standard
Low Capacitance
Solid State Protector
0
0
20
40
60
80
Time µs
100 120 140
160
FIGURE 4
PULSE WAVE FORM
120
Current - Amperes
FIGURE 2
CX 12LC CLAMPING VOLTAGE
100
80
60
40
t
f
Peak Value I
PP
C - TVS Capacitance - pF
e
-t
Test
Waveform
Parameters
t
f
= 8µs
t
d
= 20µs
30
20
10
0
0
20
40
60
80 100 120 140
Time µs
160
100
ProTek’s
CX12LC
t
d
= t
20
0
I
PP
/2
10
0
1
2
3
4
5
V
(OP)
- Circuit Operating - Volts
0
5
10
15
20
25
30
t - Time - µs
Figure 1 and 2 are photographs of digitized waveforms
showing a typical transient voltage and the clamping
action of the CX12LC module. The device was sub-
jected to a 2000A, 8/20µs impulse waveform in accor-
dance with ANSI C62.36. The CX12 has an operating
frequency range up to 10MHz and the CX12LC up to
100MHz.
Figure 3 shows a comparison of capacitance between a
industrial standard device (Top Line) and the ProTek Device
CX12LC (Bottom Line). Due to the drastic change in the
capacitance of the product (Top Line), signal distortion,
loss of data or even access into the computer may be a
problem.
05017.R2 7/02
1
www.protekdevices.com
CX12
and
CX12LC
DEVICE CHARACTERISTICS
MAXIMUM RATINGS @ 25°C
Peak Operating Line Voltage (V OP )
Operating Line Current (I O )
Maximum Transient Voltage
Maximum Transient Current
Maximum Leakage Current
CX12 Frequency Responce -3 dB
CX12LC Frequency Responce -3 dB
Operating & Storage Temperature
Response Time
±12 V
200mA
20kV
3000A (8/20µs)
5µA
@ 30MHz
@ 200MHz
-40° to +85°C
< 10 ns
ELECTRICAL CHARACTERISTICS @ 25°C
MAXIMUM
CLAMPING
VOLTAGE
MAXIMUM
LINE
THRUPUT
RESISTANCE
R
TYPICAL
CAPACITANCE
@ 0 V, 1 MHz
C
PROTEK
PART
NUMBER
*
Line-Ground
500A @ 8/20 ms
V
C
VOLTS
OHMS
3
10
pF
200
25
CX12
CX12LC
24
28
*
Other Voltages Available Consult Factory
Frequency Responce CX12
1.21”
(30.73 mm)
1.10”
(27.94 mm)
1.40”
(35.56 mm)
1.10”
(27.54 mm)
Frequency Responce CX12LC
0.15”
(3.81mm)
0.72”
(18.29 mm)
EQUIPMENT
INST
ALLA
TION
The CX12 series is designed with a female BNC type connector on both ends for
easy installation. Disconnect the video or data line from the sensitive equipment.
Insert the CX12 in the line near the AC power outlet of the equipment to be
protected. Install a cable in between the CX12 and the equipment to be pro-
tected. Attach a ground wire between the case of the CX12 and the equipment AC
power ground, or to the coax shield as required.
0.72”
(18.29 mm)
0.70”(17.78 mm)
05017.R2 7/02
2
www.protekdevices.com
LINE
CAUTION: Mounting plate must be
CAUTION:Mounting plate must
connected
earth ground
be connected to
to earth ground
CX12 COAXIAL
LINE PROTECTOR
CX 12 - COAXIAL
LINE PROTECTOR
0.150” DIA. (3.81 mm) Mounting Holes
2.95”
(74.93 mm)
3.25”
(82.55 mm)
2.25”
(57.15 mm)
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