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HomeShop SuppliesFluids, Oils, & LubricantsGreaseDow Corning 340 DOWSIL™ White Heat Sink CompoundDow Corning 340 DOWSIL™ White Heat Sink Compound Lubricant/Grease - 142 Gram Tube
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Dow Corning 340 DOWSIL™ White Heat Sink Compound Lubricant/Grease - 142 Gram Tube
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Dow Corning 340 DOWSIL™ White Heat Sink Compound Lubricant/Grease - 142 Gram TubeDow Corning 340 DOWSIL™ White Heat Sink Compound Lubricant/Grease - 142 Gram Tube

Dow Corning 340 DOWSIL™ White Heat Sink Compound Lubricant/Grease - 142 Gram Tube

Part#: 1446622
Our Price: $31.39
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Material Safety Information
Code: UN3077 | Class: 9 | Group: III - Details
Material Safety Data Sheet: MSDS1
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1 - 5$31.39 ea.
6 - 11$30.58 ea.
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24+$28.71 ea.
 
 
Dow Corning 340 Heat Sink Compound is a grease-like silicone fluid thickened with metal oxide filler, which promotes high thermal conductivity, high-temperature stability and low bleed. It is applied to the base and mounting studs of transistors, diodes and silicon-controlled rectifiers. It also serves as a highly effective thermal coupler for many heat sink devices where it helps maintain a positive heat sink seal which improves heat transfer from the electrical/electronic device to the heat sink or chassis. Also suitable for aircraft engines where heat sink properties are required. This product has also been used as a high-voltage corona suppressant, nonflammable coating in connections for flyback transformers and TV sets and similar applications. The compound resist changes in consistency at temperatures up to approximately 350°F (177°C).

Dow Corning 340 Heat Sink Compound has a shelf life of 60 months from date of manufacture. Refer to the product packaging for "Use By" date.

Alternate PN#s: DC340 DC340-5OZ
 
Product Details
UOM : Each
Size : 142 gm
Color Family : White
Ship Dimensions : 7 x 2 x 1.5 inches
Shipping Weight : 1.3 pounds
Manufacturer P/N : 1446622
NSN : 6850-00-927-9461
ECCN : EAR99
Schedule B Code : 3824.90.9270
Military Standard : MIL-C-47113 MIL-DTL-47113 A-A-56022
Alt. P/Ns : DC340 DC340-5OZ
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Features
  • High thermal conductivity
  • Low bleed
  • Stable at high temperatures
  • Specifications
    Typical Properties

    Method Test Result
    Color White
    ASTM D 217 Consistency, Penetration
    unworked
    worked 60 strokes
    worked 100,000 strokes

    300
    275
    245
    Fed. Std. 791, Method 321.2 Bleed after 24 hr at 392°F (200°C) 0.05%
    Fed. Std. 791, Method 321.2 Evaporation after 24 hr at 392°F (200°C) 0.5%
    ASTM D 2265 Drop Point 570°F (300°C)
    ASTM D 1475 Specific Gravity at 77°F (25°C) 2.1
    CTM* 0069 Thermal Conductivity, K Factor 0.0014 cal/sec-cm-°C
    ASTM D 149 Dielectric Strength** 210 volts/mil
    ASTM D 495 Arc Resistance 165 seconds
    ASTM D 150 Dielectric Constant
    at 100 Hz
    at 100 kHz

    5
    5
    ASTM D 150 Dissipation Factor
    at 100 Hz
    at 100 kHz

    0.01
    0.02
    ASTM D 1169 Volume Resistivity 2 x 10^15 ohm-cm
    ASTM D 4049 Water Spray Off 1.3%

    *CTMs (Corporate Test Methods) correspond to standard ASTM tests in most instances.
    **Measured using a sample thickness of 50 mils.
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