951 Bergquist, 951 Datasheet - Page 9

• Manufacturer Part Number: 951
• Description: THERMAL PAD TO-220 .009" SP1000
• Manufacturer: Bergquist
• Series: Sil-Pad® 1000r

Specifications of 951

• Usage: TO-220
• Shape: Rectangular
• Outline: 19.05mm x 12.70mm
• Thickness: 0.009" (0.229mm)
• Backing, Carrier: Fiberglass
• Color: Pink
• Thermal Resistivity: 0.35°C/W
• Thermal Conductivity: 1.2 W/m-K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Adhesive: -
• Other names: 951; BER199

Electrical Isolation - Power Applications
Dielectrics are available in thicknesses from 0.003" (76µm) to 0.009"
(229µm), depending on your isolation needs. See “Electrical Design
Considerations” on pages 16-17 to help determine which thickness is
appropriate for your application.
Thermal Impedance Determines Watt Density
Thermal impedance is the only measurement that matters in
determining the watt density capability of your application because
it measures the temperature drop across the stack-up for each watt
of heat flow. Lower thermal impedance results in lower junction tem-
peratures.The lower the thermal impedance, the more efficiently heat
travels out of the components.
.002"
(51)
.002"
(51)
Breakdown Voltage In Oil with 2" (51mm) Probe
Lower Thermal Impedance = Lower JunctionTemperatures
.004"
(102)
.004"
(102)
TOTAL IMPEDANCE
Dielectric Thickness Inches (µm)
Dielectric Thickness Inches (µm )
ASTM D149
.006"
(152)
.006"
(152)
.008"
(203)
(203)
.008"
=
.010"
(254)
.010"
(254)
Thermal Conductivity
Selecting Dielectric Materials
Sample Thickness
.012"
(305)
.012"
(305)
High Power Lighting Applications
HPL is a dielectric specifically formulated for high power lighting LED
applications with demanding thermal performance requirements. This
thin dielectric at 0.0015" (38µm) has an ability to withstand high tem-
peratures with a glass transition of 185°C and phenomenal thermal
performance of 0.30°C/W. For detailed information, call Bergquist
Sales or go online.
1.7
1.2
0.7
0.2
.000"
.003"
(0)
(76)
.002"
+ Interfacial Resistance
(51)
MP
HT
CML
HPL
.005"
(127)
.004"
(102)
Dielectric Thickness Inches (µm)
Dielectric Thickness Inches (µm)
(152)
.006"
(178)
.007"
.008"
(203)
.009"
(229)
.010"
(254)
.012"
(305)
.011"
(279)
.014"
(357)
7