MIL-PRF-38534 CERTIFIED FACILITY
M.S.KENNEDY CORP.
600V/300A
SCR/DIODE PEM
4707 Dey Road Liverpool, N.Y. 13088
4891
(315) 701-6751
FEATURES:
SCR/DIODE Topology
600V Rated Voltage
300A Continuous Current
Proprietary Encapsulation Provides Near Hermetic Performance
HI-REL Screening Available (Modified 38534)
Light Weight Domed ALSIC Baseplate
Robust Mechanical Design for Hi-Rel Applications
Ultra-Low Inductance Internal Layout
Withstands 96 Hours HAST and Thermal Cycling (-55°C to +125°C)
DESCRIPTION:
The MSK 4891 is one of a family of plastic encapsulated modules (PEM) developed specifically for use in military,
aerospace and other severe environment applications. The SCR/DIODE configuration and 600 volt/300 amp rating make it
ideal for use in high current motor drive and inverter brake applications. The Aluminum Silicon Carbide (AlSiC) baseplate
offers superior flatness and light weight; far better than the copper or copper alloys found in most high power plastic
modules. The high thermal conductivity materials used to construct the MSK 4891 allow high power outputs at elevated
baseplate temperatures. Our proprietary coating, SEES™ - Severe Environment Encapsulation System - protects the internal
circuitry of MSK PEM's from moisture and contamination, allowing them to pass the rugged environmental screening
requirements of military and aerospace applications. MSK PEM's are also available with industry standard silicone gel
coatings for a lower cost option.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Motor Drives
Inverters
1
Rev. B
8/11
ABSOLUTE MAXIMUM RATING
IT
ITSM
IF
I FP
VCASE
6
TST
TJ
TC
SCR Forward Current (Continuous)
300A
SCR Peak Surge Current (1/2 Cycle 60Hz) 1100A
Diode Current (Continuous)
300A
Diode Current Pulsed (1mS)
600A
Case Isolation Voltage
2500V
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Storage Temperature Range
-55°C to +125°C
Junction Temperature
150°C
Case Operating Temperature Range
MSK 4891H
-55°C to +125°C
MSK 4891
-40°C to +85°C
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ELECTRICAL SPECIFICATIONS
NOTES:
1
2
3
4
5
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade devices shall be tested to subgroup 1 unless otherwise specified.
HI-REL grade devices ("H" suffix) shall be 100% tested to subgroups 1, 2 and sample tested to subgroup 3.
Subgroup 4 testing available upon request.
Subgroup 1, 4 TA = +25°C
2, 5 TA = +125°C
3, 6 TA = -55°C
6 Continuous operation at or above absolute maximum ratings may adversly effect the device performance and/or life cycle.
2
Rev. B
8/11
TYPICAL PERFORMANCE CURVES
TBD
3
Rev. B
8/11
SCREENING CHART
4
Rev. B 8/11
MECHANICAL SPECIFICATIONS
WEIGHT = 200 GRAMS MAX.
MSK4891 H
ORDERING INFORMATION
SCREENING
BLANK=INDUSTRIAL; H=HI-REL (MODIFIED 38534)
GENERAL PART NUMBER
THE ABOVE EXAMPLE IS A MILITARY SCREENED MODULE.
M.S. Kennedy Corp.
4707 Dey Road Liverpool, New York 13088
Phone (315) 701-6751
FAX (315) 701-6752
www.mskennedy.com
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however, and assumes no liability for the use of its products.
Please visit our website for the most recent revision of this datasheet.
5
Rev. B
8/11