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參數(shù)資料
| 型號： | P2102AA61AP |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:22; Connector Shell Size:28; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
| 中文描述： | SIDACtor設備 |
| 文件頁數(shù)： | 176/212頁 |
| 文件大?。?/td> | 1877K |
| 代理商： | P2102AA61AP |
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Overcurrent Protection
http://www.teccor.com
+1 972-580-7777
5 - 14
2002 Teccor Electronics
SIDACtor
Data Book and Design Guide
Overcurrent Protection
In addition to protecting against overvoltage conditions, equipment should also be protected
from overcurrent conditions using either PTCs, fuses, power/line feed resistors, or
flameproof resistors. In all instances the overcurrent protector is a series element placed in
front of the overvoltage protector on
either
Tip
or
Ring for metallic (closed loop)
applications and on
both
Tip
and
Ring for longitudinal (grounded) applications.
PTCs
PTCs are positive temperature coefficient thermistors used to limit current. During a fault
condition, heat is generated at a rate equal to I
2
R. When this heat becomes sufficient, the
PTC increases its resistance asymptotically until the device simulates an open circuit,
limiting the current flow to the rest of the circuit. As the fault condition drops below the
PTC’s holding current, the device begins to reset, approximating its original off-state value
of impedance.
Advantages
Because PTCs are resettable devices, they work well in a variety of industrial applications
where electrical components cannot withstand multiple, low-current faults.
Restrictions
Although PTCs are well suited for the industrial environment and in many telecom
applications, they exhibit some limitations that have prevented them from being endorsed
by the entire telecommunications industry. Limitations include low surge current ratings,
unstable resistance, and poor packaging options.
Applications
PTCs are used in a variety of applications. In addition to protecting telecommunications
equipment, PTCs are also used to prevent damage to rechargeable battery packs, to
interrupt the current flow during a motor lock condition, and to limit the sneak currents that
may cause damage to a five-pin module.
Fuses
Due to their stability, fuses are one of the most popular solutions for meeting AC power
cross requirements for telecommunications equipment. Similar to PTCs, fuses function by
reacting to the heat generated due to excessive current flow. Once the fuses I
2
t rating is
exceeded, the center conductor opens.
Advantages
Fuses are available in both surface mount and through-hole packages and are able to
withstand the applicable regulatory requirements without the use of any additional series
impedance. Chosen correctly, fuses only interrupt a circuit when extreme fault conditions
exist and, when coordinated properly with an overvoltage protector, offer a very competitive
and effective solution for transient immunity needs.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| P2102AA61RP | 制造商:TECCOR 制造商全稱:TECCOR 功能描述:SIDACtor devices |
| P2102AA61RP1 | 制造商:TECCOR 制造商全稱:TECCOR 功能描述:SIDACtor devices |
| P2102AA61RP2 | 制造商:TECCOR 制造商全稱:TECCOR 功能描述:SIDACtor devices |
| P2102AA61TP | 制造商:TECCOR 制造商全稱:TECCOR 功能描述:SIDACtor devices |
| P2102AL-2 | 制造商:Intel 功能描述:Static RAM, 1Kx1, 16 Pin, Plastic, DIP |
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