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參數(shù)資料
| 型號(hào)： | P3500EBRP2 |
| 英文描述： | SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR |
| 中文描述： | SIDAC的| 400V五（公報(bào)）最大| 800mA的我（縣）|對(duì)92VAR |
| 文件頁(yè)數(shù)： | 95/161頁(yè) |
| 文件大?。?/td> | 986K |
| 代理商： | P3500EBRP2 |
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SIDACtor
Data Book
UL 1459 2nd Edition
Teccor Electronics
(972) 580-7777
4 - 21
R
R
5,"#9&!
Overview
After the 1984 divestiture of the AT&T/Bell system, the National Electric Code (NEC)
implemented Article 800-4 which mandates that
“
all equipment intended for connection
to the public telephone network be listed for that purpose
”
to help ensure electrical
safety. One way a manufacturer can meet this requirement is to
“
list
”
their product with
Underwriters Laboratories under UL 1459 (also see UL1950).
UL 1459
Because telephone lines run in close proximity to AC power lines, the NEC requires
that all telecommunication wiring that enters a building pass through a primary
protector which is designed to limit AC transients in excess of 600V
RMS
. But because
most telecommunication equipment incorporates a secondary over-voltage protector
that is designed to shunt transient voltages in excess of 250V
RMS
, a potentially
dangerous condition arises because of the voltage gap that exists between these two
protectors.
Consider the following: a transient condition exists and the secondary over-voltage
protector triggers, but the primary protector does not, i.e. a 440V
RMS
power cross. The
secondary protector will shunt the transient voltage for as long as the transient
condition exists or until the current path is interrupted. Now assume a worse case
scenario; that the resultant current path is not interrupted and the power cross is
indefinite. The net result will be the ignition of the premises wiring, the equipment, or
both.
To help minimize this likelihood, UL requires that all registered equipment comply with
the over-voltage tests listed in UL 1459, section 50A.
Over-Voltage Tests
The over-voltage tests found in section 50A of UL 1459 use two separate test circuits
to simulate a 600V
RMS
crossover between an AC power line and a
telecommunications line. The circuit used in Figure 4-9 simulates a metallic power
cross by applying a voltage potential between Tip and Ring. The circuit used in Figure
4-10 simulates a longitudinal power cross by applying a voltage potential between Tip
and Ring with respect to earth ground.
Table 4-17 outlines the applicable over-voltage tests which simulate long and short
term induction as well as direct power contact. The most common approach to pass
these tests is to add a series fuse element on Tip
and
Ring for applications that
connect to earth ground, or add a series fuse element on
either
Tip
or
Ring for
applications that do not connect to earth ground.
Note:
Because telephone circuits typically draw 40-100mA of current during normal
operation, fuses should be selected to be large enough to prevent nuisance tripping
yet small enough that they won’t allow the wiring simulator to open during test. Fuse
values between 250mA and 1.25A meet this requirement.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P3500EC | SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR |
| P3500ECRP1 | SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR |
| P3500ECRP2 | SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR |
| P3500SARP | SIDAC|400V V(BO) MAX|800MA I(S)|DO-214AA |
| P3500SBRP | SIDAC|400V V(BO) MAX|800MA I(S)|DO-214AA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P3500EC | 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 500A 320V 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(kāi)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 |
| P3500ECAP | 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 500A 320V 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(kāi)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 |
| P3500ECL | 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 500A 320V 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(kāi)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 |
| P3500ECLAP | 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 500A 320V 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(kāi)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 |
| P3500ECLRP1 | 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 500A 320V 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(kāi)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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