參數(shù)資料
型號(hào)： P0641SCRP
英文描述： 18LD 4MHZ 2K EPRM/128 EEPROM, -40C to +85C, 18-PDIP, TUBE
中文描述： SIDAC的| 77V V（下公報(bào)）最大| 800mA的我（縣）|的DO - 214AA
文件頁數(shù)： 67/161頁
文件大小： 986K
代理商： P0641SCRP
SIDACtor
Data Book
Primary Protection
Teccor Electronics
(972) 580-7777
3 - 27
R
Overview
Primary telecommunications protectors are required to be deployed at points where
exposed twisted pairs enter an office building or residence. This requirement is
mandated in North America by the National Electric Code (NEC) and is done so to
protect end users from the hazards associated with lightning and power cross
conditions.
Provided by the local exchange carrier, primary protection can be segregated into
three distinct categories:
1. Station protection - typically associated with a single twisted pair.
2. Building entrance protection - typically associated with multiple (25 or more)
twisted pair.
3. Central office protection - typically associated with numerous twisted pair feeding
into a switch.
Station protectors provide primary protection for a single dwelling residence or office.
The station protector is located at the network interface unit (NIU) which acts as the
point of demarcation, separating the operating companies lines from the customer
’
s.
Building entrance protection is accomplished by installing a multi-line distribution panel
that has integrated over-voltage protection. These panels are normally located where
multiple twisted pairs enter a building.
Central and remote office protection is accomplished using a 5-pin protection module
which is plugged into a main distribution frame (MDF). Like station and building
entrance protection, the MDF is located where exposed cables enter the switching
office.
Protection Requirements
Station protectors should be able to withstand over-voltages that exceed 5000V and
surge currents up to 250A. Building entrance and 5-pin module protectors should be
able to withstand over-voltages that exceed 2500V and surge currents of up to 100A.
The SIDACtors shown in Figures 3-29 & 3-30 meet these requirements.
Applicable Regulatory requirements
UL 497
GR 974-CORE
ITU K.28
Primary Protection Reference Circuit
Figures 3-29 & 3-30 show different configurations used in primary protection. It should
be noted that the peak off-state voltage (V
DRM
) of any device intended to be used in
primary protection applications should be greater than the potential of a Type B ringer
superimposed on a POTS (plain old telephone service) battery.
150V
RMS
√
2 + 56.6Vpk = 268.8Vpk
相關(guān)PDF資料
PDF描述
P0720EA 18LD 4MHZ 2K EPRM/128 EEPROM, 0C to +70C, 18-SOIC 300mil, T/R
P0720EARP1 20LD 4MHZ 2K EPRM/128 EEPROM, -40C to +85C, 20-SSOP 208mil, T/R
P0720EARP2 18LD 20MHZ 2K EPRM/128 EEPROM, -40C to +85C, 18-SOIC 300mil, T/R
P0720EB MCU CMOS 18LD 2K EPRM/128 EEPROM, 0C to +70C, 18-PDIP, TUBE
P0720EBRP1 MCU CMOS 18LD 2K EPRM/128 EEPROM, -40C to +85C, 18-PDIP, TUBE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P0641U 制造商:TECCOR 制造商全稱:TECCOR 功能描述:solid state crowbar devices
P0641U_L 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:Multiport SLIC Protector
P0641UAL 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:Multiport SLIC Protector
P0641UALRP 功能描述:硅對(duì)稱二端開關(guān)元件 50A 58V 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
P0641UALTP 功能描述:硅對(duì)稱二端開關(guān)元件 50A 58V 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
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