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KMP-1605

产品描述Lan-Pak for CSMA/CD Systems
文件大小89KB,共2页
制造商Murata(村田)
官网地址https://www.murata.com
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KMP-1605概述

Lan-Pak for CSMA/CD Systems

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www.murata-ps.com
1605C
Lan-Pak for CSMA/CD Systems
SELECTION GUIDE
Order Code
Turns Ratio
Min.
Primary
Inductance
μH
Max.
DC Resistance
Ω
Min.
ET Constant
Vμs
Max.
Leakage
Inductance
μH
Max.
Inerwinding
Capacitance
pF
1605C
1:1
26.0
0.2
1.8
0.2
8
ABSOLUTE MAXIMUM RATINGS
FEATURES
RoHS compliant
500Vrms isolation
Industry-standard footprint
Compatible with standard networks
Backward compatible with
Sn/Pb soldering systems
Operating free air temperature range
Storage temperature range
Isolation voltage (flash tested for 1 second)
0°C to 70°C
-60°C to 125°C
500Vrms
SOLDERING INFORMATION
1
Peak wave solder temperature, 1.5mm from case
Pin finish
All specifications typical at T
A
=25°C.
1 For further information, please visit www.murata-ps.com/rohs
300˚C for 10 seconds
Matte Tin
TECHNICAL NOTES
ISOLATION
VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Volt-
age’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’
are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed
to provide electrical isolation, to verify the integrity of that
isolation.
All products in this series are 100% production tested at
their stated isolation voltage.
A question commonly asked is, “What is the continuous
voltage that can be applied across the part in normal opera-
tion?”
For a part holding no specific agency approvals both input
and output should normally be maintained within SELV limits
i.e. less than 42.4V peak, or 60VDC. The isolation test volt-
age represents a measure of immunity to transient voltages
and the part should never be used as an element of a safety
isolation system. The part could be expected to function cor-
rectly with several hundred volts offset applied continuously
across the isolation barrier; but then the circuitry on both
sides of the barrier must be regarded as operating at an
unsafe voltage and further isolation/insulation systems must
form a barrier between these circuits and any user-acces-
sible circuitry according to safety standard requirements.
DESCRIPTION
The 1605C is a package of unity-turns-ratio
isolation transformers. The transformers are
designed to have fast rise times with low phase
shift and insertion loss to reduce signal distortion.
The high shunt impedance of these devices
minimises system loading and enables the correct
termination conditions to be accurately defined by
means of resistors. The devices can be used as
network-node isolators in CSMA/CD systems.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation
testing of a barrier component can actually degrade
isolation capability, to a lesser or greater degree
depending on materials, construction and environ-
ment. This series has toroidal isolation transformers,
with no additional insulation between primary and
secondary windings of enameled wire. While parts
can be expected to withstand several times the
stated test voltage, the isolation capability does de-
pend on the wire insulation. Any material, including
this enamel (typically polyurethane) is susceptible
to eventual chemical degradation when subject to
very high applied voltages thus implying that the
number of tests should be strictly limited. We there-
fore strongly advise against repeated high voltage
isolation testing, but if it is absolutely required, that
the voltage be reduced by 20% from specified test
voltage.
This consideration equally applies to agency recog-
nized parts rated for better than functional isolation
where the wire enamel insulation is always supple-
mented by a further insulation system of physical
spacing or barriers.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KMP_1605C_D01
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