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| 型號(hào)： | P0300ECRP2 |
| 英文描述： | MCU CMOS 40 LD 10MHZ 8K OTP, -40C to +85C, 40-PDIP, TUBE |
| 中文描述： | SIDAC的| 40V的五（公報(bào)）最大| 800mA的我（縣）|對(duì)92VAR |
| 文件頁(yè)數(shù)： | 98/161頁(yè) |
| 文件大?。?/td> | 986K |
| 代理商： | P0300ECRP2 |
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UL 1950 3RD Edition/CSA C22.2 No. 950-95
SIDACtor
Data Book
4 - 24
Teccor Electronics
(972) 580-7777
5,"&9':
5'
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Overview
In an attempt to harmonize North American safety standards with Europe
’
s IEC 950,
Underwriters Laboratories and the Canadian Standards Association have adopted a
bi-national standard, UL 1950 in the U.S and CSA C22.2 No. 950-95 in Canada, to
replace UL1459 and CSA C22.2.
UL 1950 (CSA C22.2 No. 950-95) is applicable to
“
information technology equipment
”
with a rated voltage not exceeding 600V
RMS
, that is intended to be powered by either a
battery or electrical mains, and is designed to be installed in accordance with the
Canadian Electric Code, the National Electric Code, and NFPA 70. Effective dates are
as follows:
1.
July 28, 1995-April 1, 2000:
New product submittals will be evaluated against
the requirements of UL 1950 (CSA C22.2 No. 950-95) unless use of another
existing national standard is requested in writing by the manufacturer.
2.
From April 1
st
, 2000:
Products previously approved in accordance with existing
national standards, i.e., UL 1459 and CSA 22.2, will continue to be considered
approved until April, 1 2005.
3.
As of April 5
th
, 2005
: All products, whether new or previously approved, must
comply with UL 1950 (CSA C22.2 No. 950-95).
UL 1950
Like UL 1459, UL 1950 is intended to help ensure the electrical safety of equipment
that is connected to the public switched telecommunications network (PSTN). And
although the over-voltage requirements are somewhat similar, UL1950 permits design
engineers a much greater degree of flexibility through the use of design exceptions
found in the Over-Voltage Flowchart (Figure 4-11
).
Over-Voltage Flowchart
The Over-Voltage Flowchart contains specific guidelines that determine which over-
voltage requirements are applicable to specific designs. Applicable information that
pertains to the Over-Voltage Flowchart is:
1.
Current Limiting
- Equipment that has a fire enclosure along with methods for
limiting current to an I
2
t rating of 100A
2
s or 1.3A steady state, is not subject to
over-voltage testing.
2.
26 AWG Line Cord
- This refers to a 26 American Wire Gauge (AWG)
telecommunications line cord that is either supplied with the equipment or is
described in the safety instructions.
3.
Clause 6.3.3
- The telephone line must be adequately isolated from earth for the
operating mode being considered and at a voltage of 120V
RMS
. Refer to
section 6.3.3 of UL1950.
4.
Fire Enclosure
- Fire enclosures minimize fire hazards by containing any
emission of flame, molten metal, flaming drops, or glowing particles that could
be emitted by the equipment under fault conditions. Fire enclosure construction
is covered in section 4.4.6 of UL 1950.
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| P0300S_L | 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:SIDACtor㈢ Device |
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