420LB(2010) データシートの表示（PDF） - ProTek Devices.
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420LB Datasheet PDF : 5 Pages
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Only One Name Means ProTek’Tion™
typical device characteristics
420LB28 - 420LE60
MAXIMUM RATINGS @ 25°C Unless Otherwise Specified
PARAMETER
SYMBOL
Operating Line Current
IO
Transient Source Voltage
-
Transient Current - 8/20µs waveform
-
Operating Temperature
TA
Storage Temperature
TSTG
VALUE
100
6
10
-55 to 100
-55 to 100
PART
NUMBER
ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified
MAXIMUM
operating
line VOLTAGE
MAXIMUM
LEAKAGE
CURRENT
MAXIMUM
CLAMPING
VOLTAGE
(8/20µs)
maximum
capacitance
420LB28
420LB35
420LB60
420LE28
420LE35
420LE60
VOP
±volts
28.0
35.0
60.0
28.0
35.0
60.0
@ vop
ID
µA
5.0
5.0
5.0
5.0
5.0
5.0
@ 2000A
VC
volts
40
60
85
40
60
85
@ 0v, 1mhz
c
pF
2800
1500
1000
2800
1500
1000
UNITS
mA
kV
kA/Wire
°C
°C
maximum
line
throughput
resistance
r
ohms
12
12
12
12
12
12
installation instructions
There are five (5) terminals on the LINE SIDE and five (5) terminals on the EQUIPMENT SIDE of the 420LE, 4 data lines and one ground. Both grounds are connected
together internally. A single low impedance is ground sufficient. Incoming data lines are cut or disconnected from the equipment to insert the 420LE/B products. The
incoming lines are to be connected to the line side terminals as the equipment side lines are connected to the equipment side terminals. The location of the product
should be as close to the equipment as possible. The 420LE/B series 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 side for those 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 im-
pedance 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.
05048.R4 12/10
Page 2
www.protekdevices.com
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