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參數(shù)資料
| 型號(hào)： | P2353ACRP |
| 英文描述： | MCU CMOS 64 LD LOW PWR, -40C to +85C, 64-TQFP, TRAY |
| 中文描述： | SIDAC的| 270V的五（公報(bào)）最大| 800mA的我（縣）|對(duì)220VAR |
| 文件頁數(shù)： | 127/161頁 |
| 文件大?。?/td> | 986K |
| 代理商： | P2353ACRP |
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SIDACtor
Data Book
Over-Current Protection
Teccor Electronics
(972) 580-7777
5 - 11
T
>
In addition to protecting against over-voltage conditions, equipment should also be
protected from over-current conditions using either PTC
’
s, fuses, power/line feed
resistors, or flameproof resistors. In all instances the over-current protector is a series
element placed in front of the over-voltage protector on
either
Tip
or
Ring for metallic
(closed loop) applications and on
both
Tip
and
Ring for longitudinal (grounded)
applications.
PTC’s
Overview
PTC
’
s 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 will increase its resistance asymptotically until the device simulates
an open, 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 PTC
’
s are resettable devices, they work well in a variety of industrial
applications where electrical components can not withstand multiple, low current
faults.
Restrictions
Although PTC
’
s 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
PTC
’
s are used in a variety of applications. In addition to protecting
telecommunications equipment, PTC
’
s are also used to prevent damage to
rechargeable battery packs, interrupt the current flow during a motor lock condition,
and limit the sneak currents that may cause damage to a 5-pin module.
Fuses
Overview
Due to their stability, fuses are one of the most popular solutions for meeting AC power
cross requirements for telecommunications equipment. Similar to PTC
’
s, 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 will open.
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 will only interrupt a circuit when extreme
fault conditions exist, and when coordinated properly with an over-voltage protector,
offer a very competitive and effective solution for transient immunity needs.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P2353U | 制造商:TECCOR 制造商全稱:TECCOR 功能描述:solid state crowbar devices |
| P2353U_L | 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:Balanced Three-chip SIDACtor |
| P2353UALRP | 功能描述:硅對(duì)稱二端開關(guān)元件 3Chp 200V 50A RoHS:否 制造商:Bourns 轉(zhuǎn)折電流 VBO:40 V 最大轉(zhuǎn)折電流 IBO:800 mA 不重復(fù)通態(tài)電流: 額定重復(fù)關(guān)閉狀態(tài)電壓 VDRM:25 V 關(guān)閉狀態(tài)漏泄電流（在 VDRM IDRM 下）: 保持電流（Ih 最大值）:50 mA 開啟狀態(tài)電壓:5 V 關(guān)閉狀態(tài)電容 CO:120 pF 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AA |
| P2353UALTP | 功能描述:硅對(duì)稱二端開關(guān)元件 3Chp 200V 50A RoHS:否 制造商:Bourns 轉(zhuǎn)折電流 VBO:40 V 最大轉(zhuǎn)折電流 IBO:800 mA 不重復(fù)通態(tài)電流: 額定重復(fù)關(guān)閉狀態(tài)電壓 VDRM:25 V 關(guān)閉狀態(tài)漏泄電流（在 VDRM IDRM 下）: 保持電流（Ih 最大值）:50 mA 開啟狀態(tài)電壓:5 V 關(guān)閉狀態(tài)電容 CO:120 pF 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AA |
| P2353UALXX | 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:The series provides a single port surface mount solution that enables voice |
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