KMP_1000C_B03 Page 2 of 2
1000 Series
Pulse Transformers
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without
notice. © 2011 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/support
MECHANICAL DIMENSIONS
PIN CONNECTIONS (TOP VIEW)
15.06 (0.593)
15.06
(0.593)
15.75±0.50
(0.620±0.02)
20.5
(0.807)
5.08 (0.20)
5.08 (0.20)
10.16 (0.40)
Ø0.71±0.05
(Ø0.028±0.002)
1003C
YYWW
15.06 (0.593)
15.06
(0.593)
15.75±0.50
(0.620±0.02)
20.5
(0.807)
10.16 (0.40)
10.16 (0.40)
Ø0.71±0.05
(Ø0.028±0.002)
1001C
YYWW
12
2
6
2
4
6
1
5
1
3
5
Pri
Sec
Pri
S2 S1
2
4
6
1
3
5
PriSec
A
B
All dimensions in mm (inches). Package weight: 8.0g Typ.
C
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isola-
tion Test Voltage’ are all terms that relate to the same thing, a test voltage, applied for a specifi ed 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 operation?”
For a part holding no specifi c 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 voltage 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 correctly 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-accessible circuitry according to safety standard requirements.
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 great-
er degree depending on materials, construction and environment. While
parts can be expected to withstand several times the stated test voltage,
the isolation capability does depend on the insulative materials used.
Such materials are susceptible to chemical degradation when subject
to very high applied voltages. We therefore strongly advise against
repeated high voltage isolation testing, but if it is absolutely required,
that the voltage be reduced by 20% from specifi ed test voltage.
This consideration equally applies to agency recognized parts rated for
better than functional isolation where wire enamel insulation is always
supplemented by a further insulation system of physical spacing or
barriers.
