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參數(shù)資料
| 型號： | ID201 |
| 廠商： | MICROSEMI CORP-LAWRENCE |
| 元件分類： | 晶閘管 |
| 英文描述： | SCRs 1.6 Amp, Planear |
| 中文描述： | 2.512 A, 100 V, SCR, TO-39 |
| 封裝： | HERMETIC SEALED, METAL, TO-39, 3 PIN |
| 文件頁數(shù)： | 4/4頁 |
| 文件大?。?/td> | 56K |
| 代理商： | ID201 |
Printed in U.S.
Impulse Discharge Current
- is defined as the peak
current of an impulse which the device can withstand ten
times (5 of each polarity at fixed time intervals) without
substantially affecting device performance. The test
normally used to determine this capacity uses the
8/ 20ms waveform as depicted below where T1=8ms and
T2=20ms.
Maximum Discharge Current
- defined as the peak
current of an impulse which the device can withstand
once without substantially affecting device performance.
Residual Impulse
- defined as the voltage that will pass
through the device prior to activation of the GDT.
Residual Voltage
- defined as the small amount of
voltage left on the line after an impulse passes
Frequently Asked Questions
1) If lightning rods are installed in an antenna site is
additional protection required
Yes. Lightning is highly unpredictable and can strike locations
other than the lightning rod. When lightning does strike a rod,
there are still secondary pulses which installations should be
protected against in key areas.
2) Where should lightning protection be positioned
within the cellular infrastructure
Normally protection is installed at the junctions where the
transmission line joins the antenna and where the cable joins
the base station electronics. Lightning protection needs to be
tailored to the particular infrastructure. The type of devices
used and locations depend on the sensitivity of the electronics
and their location within the infrastructure (i.e. mast-top
electronics vs. standard base station location).
3) What is the shelf life of a replacement GDT
The typical shelf life of a replacement GDT is 5 years. This
enables the maintenance provider to inventory GDTs for
routine maintenance and insures a speedy return to service in
case of severe lightning strikes.
01
T2
T1= 1.25T
t
T
T1
A
B
0
I
1-0
0-9
0-1
0-5
4) When should a GDT be replaced within the surge
protector
GDTs are capable of withstanding multiple strikes of varying
intensity dependent on the specification of the device. However,
there are no outward signs of how many strikes a GDT has
absorbed. Routine replacement should be scheduled based on
the frequency and magnitude of storms in the area of the site.
5) Will lightning protectors contribute to inter-
modulation
There is always potential for intermodulation when a device is
placed in an RF transmission line between the antenna and the
filter. M/A-COM has taken precautions to manufacture these
devices using non-ferrous materials and to provide a superior
plating finish to ensure this condition is minimized.
6) Can existing antenna sites be retrofitted with lightning
protection
These products can be easily retrofitted into existing systems.
M/A-COM supplies protection devices to be cabled as complete
cable assemblies or as adapters. All of these are available with
standard RF interfaces including N, 7-16, and SMA.
The above information gives the basic guidelines for determining
which protection system is correct for your application. Please
contact M/A-COM’s Global Application Engineering team for
additional specifications of this exciting new product line.
M/A-COM is continuing to work on new and innovative
products for the wireless market to complement our complete
line of quality coaxial RF connectors and cable assemblies.
M/A-COM is ISO-9001 certified so you can be assured that
these new protection devices will meet the same high standards
for performance and workmanship as you have come to expect
from the leader in RF/Microwave interconnect products.
North America
Telephone:
Fax:
Central America
Telephone:
Fax:
South America
Telephone:
Fax:
Europe/Middle East/Africa
Telephone:
Fax:
Asia/Pacific
Telephone:
Fax:
1-800-366-2266
1-800-618-8883
602-949-1642
602-941-1703
770-956-0351
770-953-9056
+44 (1344) 869 595
+44 (1344) 300 020
+85 2 2375 0618
+85 2 2375 0350
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