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參數(shù)資料
| 型號： | TISP4XXXL3BJ |
| 廠商： | Bourns Inc. |
| 英文描述： | BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS |
| 中文描述： | 雙向可控硅過電壓保護器 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 335K |
| 代理商： | TISP4XXXL3BJ |
AUGUST 1999 - REVISED FEBRUARY 2005
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TISP4xxxL3BJ Overvoltage Protector Series
Fuse Values
There are two areas of fuse criteria; surge capability (TIA/EIA-IS-968 (FCC Part 68) impulse) and power cross capability (UL60950 clause 6.4
and annex NAC).
To survive an impulse, a fuse must have a melting I2t rating greater than the impulse I2t. The fuse I2t rating should be specified for the impulse
waveshape current as the normal d.c. rating may not result in adiabatic conditions. Alternatively, the fuse may be specified for a rated current
under the impulse waveshape conditions.
An exponentially decaying impulse with a current amplitude IPP and 50 % amplitude decay time of tD has an I2t value of 0.72 IPP2tD.
Test waveforms have tolerances and the formula can be approximated to IPP2tD, giving about a 40 % allowance to cover tolerances, e.g.
+5 % on IPP and +30 % on tD. Using the approximate formula, the I2t values for typical waveforms are shown in the table below.
Fuses for TIA/EIA-IS-968
To survive both the Type A surges, a fuse I
2
t value of greater than 6.4 A
2
s is needed. Fuses such as the Bel SMP 1.25 will meet this criteria and
they are rated for 60 A, 600 V a.c. interruption.
Fuses must not operate on the Type B surge. To survive a 37.5 A Type B surge, the fuse needs to have an I
2
t of greater than 0.45 A
2
s. A non-
operational pass for TIA/EIA-IS-968 Type A impulses is allowed; this could be a design approach with the TISP4xxxL3, which is likely to fail
short with Type A impulses. A fuse with an I
2
t greater than 0.45 A
2
s and less than 5.6 A
2
s would be needed to ensure that the resultant Type A
impulse fault mode disconnects the modem from the line (avoiding a permanent off-hook condition). The Bel SMP 500 fuse starts to operate at
60 % of the specified Type A impulse current levels and is rated for 60 A, 600 V a.c. interruption.
APPLICATIONS INFORMATION
TISP4xxxL3BJ and UL 60950 Power Cross
The TISP4xxxL3BJ conducts current for periods greater than the power cross test times, Figure 2, so the TISP4xxxL3BJ is not a major factor
in UL 60950 compliance. The main design task for UL 60950 power cross is about enclosure design and the selection of the other components
that are subject to power cross. A UL specified fuse together with a TISP4xxxL3BJ gives a simple approach to meeting the power cross
requirements.
Specification
Amplitude I
PP
A
200
100
37.5
37.5
500
100
Current Wave Shape
t
t
R
/
D
μ
s)
10/160
10/560
5/320
5/310
2/10
10/1000
Melting I
2
t
A
2
s
6.4
5.6
0.45
0.45
2.5
10
TIA/EIA-IS-968 Type A (FCC Part 68)
TIA/EIA-IS-968 Type B (FCC Part 68)
UL 60950 / ITU-T K.21
Telcordia (formally Bellcore)
GR-1089-CORE
UL 60950, Annex NAC testing requires that the total I
2
t does not exceed 100 A
2
s for test 1
K.21 has a.c. induction withstand tests of 1 A
2
s (basic) and 10 A s (enhanced)
Fuse power cross current capability can be determined from its time-current curve. The fuse must be rated to break the current at the applied
power cross a.c. voltage level.
Fuses for ITU-T Recommendation K.21
Like TIA/EIA-IS-968, K.21 requires an operation pass on a 37.5 A, 5/310 transverse current impulse, giving a minimum fuse I
2
t of 0.45 A
2
s. This
value may be increased when the coordination test requirements are included. Depending on the conformance level, basic or enhanced, an
a.c. power induction operational pass requires a minimum fuse I
2
t of either a 1 A
2
s or a 10 A
2
s level.
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PDF描述 |
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| TISP61089AD | DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS |
| TISP61089ASD | DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TISP4XXXL3LM | 制造商:BOURNS 制造商全稱:Bourns Electronic Solutions 功能描述:BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS |
| TISP4XXXM3AJ | 制造商:BOURNS 制造商全稱:Bourns Electronic Solutions 功能描述:BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS |
| TISP4XXXM3BJ | 制造商:BOURNS 制造商全稱:Bourns Electronic Solutions 功能描述:BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS |
| TISP4XXXM3LM | 制造商:BOURNS 制造商全稱:Bourns Electronic Solutions 功能描述:BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS |
| TISP5070H3BJ | 制造商:BOURNS 制造商全稱:Bourns Electronic Solutions 功能描述:FORWARD-CONDUCTING UNIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS |
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