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Semitron® MDS 100 Low Moisture
Test Socket Material Specifications

904 West 6th Street, Shiner, Texas 77984 USA
Phone: 1-361-594-2941     Fax: 1-361-594-2349     E-Mail:


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click to resize photo Semitron® MDS 100 was developed to offer a remarkable combination of high strength, low moisture absorption, high stiffness and the resulting dimensional stability. Its unique, proprietary polymer matrix makes it ideal for use in parts where fine machining and precise tolerances are critical. As a result, Semitron MSD-100 is an ideal choice for semiconductor test sockets, nests and fixtures in used in electrical test and packaging equipment.

With a Flexural Modulus (ASTM D790) in excess of 1,400,000 psi and extremely low moisture absorption (24 hr., ASTM D570) of .10%, Semitron MDS 100 delivers performance that solves engineering problems associated with uncontrolled application environments. Its low Coefficient of Linear Thermal Expansion (ASTM E831) of 1.1 x 10-5 also contributes to its remarkable stability. The Heat Deflection or softening temperature (ASTM D648) is 410° F (210° C)

Semitron® MDS 100 is  LIGHT GREY  in color and available in sheet or plates ranging in thicknesses from 1 mm to 6 mm (.04 to .236") in sheet sizes of 250 mm x 250 mm (9.84") and 500 mm x 500 mm (19.68"). Other thicknesses are possible.

( see also Semitron MP 370 Specifications )

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ASTM or UL test Property Semitron® MDS-100
D792 Density (lb/in³)
D570 Water Absorption, 24 hrs (% by wt) 0.10
D638 Tensile Strength (psi) 14,700
D638 Tensile Modulus (psi) 1,500,000
D638 Tensile Elongation at Break (%) 1.5
D790 Flexural Strength (psi) 20,500
D790 Flexural Modulus (psi) 1,425,000
D695 Compressive Strength (psi) -
D695 Compressive Modulus (psi) -
D785 Hardness, Rockwell R121
D256 IZOD Notched Impact (ft-lb/in) -
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
D648 Heat Deflection Temp (°F / °C)
at 264 psi

410 / 210
D3418 Glass Transition Temp (°F / °C) 320 / 160
- Max Operating Temp (°F / °C) 480 / 249
C177 Thermal Conductivity
(x 10-4 cal/cm-sec-°C)

UL94 Flammability Rating -
D149 Dielectric Strength (V/mil) short time, 1/8" thick 362
D150 Dielectric Constant at 1 MHz 3.37
D150 Dissipation Factor at 1 MHz 0.007
EOS/ESD S11.11 Surface Resistivity (ohms/square) -
EOS/ESD S11.11 Volume Resistivity (ohms-cm) -

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.
All values at 73°F (23°C) unless otherwise noted.
SEMITRON is a registered trademark of Quadrant Engineering Plastic Products.

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Boedeker Plastics, Inc.
904 West 6th Street, Shiner, Texas 77984 USA
USA TOLLFREE : 1-800-444-3485
Phone: 1-361-594-2941     Fax: 1-361-594-2349     E-Mail:

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