Sil-Pad K-4 (R) The Original Polyimide-Based Insulator Features and Benefits TYPICAL PROPERTIES OF SIL-PAD K-4 PROPERTY Color * Thermal impedance: 0.48C-in2/W (@50 psi) * Withstands high voltages * High dielectric strength * Very durable IMPERIAL VALUE Gray METRIC VALUE Gray Reinforcement Carrier Polyimide Polyimide -- Thickness (inch) / (mm) 0.006 0.152 ASTM D374 Hardness (Shore A) 90 90 ASTM D2240 Breaking Strength (lbs/inch) / (kN/m) 30 5 ASTM D1458 Elongation (%) 40 40 ASTM D412 5000 34 ASTM D412 -76 to 356 -60 to 180 -- Tensile Strength (psi) / (MPa) Continuous Use Temp (F) / (C) ELECTRICAL Dielectric Breakdown Voltage (Vac) 6000 6000 ASTM D149 Dielectric Constant (1000 Hz) 5.0 5.0 ASTM D150 Volume Resistivity (Ohm-meter) 1012 1012 ASTM D257 VTM-O VTM-O U.L.94 0.9 0.9 ASTM D5470 Flame Rating THERMAL Thermal Conductivity (W/m-K) Sil-Pad K-4 uses a specially developed film which has high thermal conductivity, high dielectric strength and is very durable. Sil-Pad K-4 combines the thermal transfer properties of well-known Sil-Pad rubber with the physical properties of a film. Sil-Pad K-4 is a durable insulator that withstands high voltages and requires no thermal grease to transfer heat. Sil-Pad K-4 is available in customized shapes and sizes. TEST METHOD Visual THERMAL PERFORMANCE vs PRESSURE Pressure (psi) 10 25 50 100 200 TO-220 Thermal Performance (C/W) 3.66 3.43 3.13 2.74 2.42 Thermal Impedance (C-in2/W) (1) 1.07 0.68 0.48 0.42 0.38 1) The ASTM D5470 test fixture was used.The recorded value includes interfacial thermal resistance.These values are provided for reference only. Actual application performance is directly related to the surface roughness, flatness and pressure applied. Typical Applications Include: * Power supplies * Power semiconductors * Motor controls Configurations Available: * Sheet form, die-cut parts and roll form * With or without pressure sensitive adhesive Building a Part Number NA Section E - 11.512 - Section D - 00 Section C 0.006 Section B - Section A SPK4 Standard Options NA = Selected standard option. If not selecting a standard option, insert company name, drawing number, and revision level. _ _ _ = Standard configuration dash number, 11.512 = 11.5" x 12" sheets, 11.5/250 = 11.5" x 250' rolls, or 00 = custom configuration AC = Adhesive, one side 00 = No adhesive Standard thicknesses available: 0.006" SPK4 = Sil-Pad K4 Material Note: To build a part number, visit our website at www.bergquistcompany.com. Sil-Pad (R): U.S. Patents 4,574,879; 4,602,125; 4,602,678; 4,685,987; 4,842,911 and others. www.bergquistcompany.com The Bergquist Company North American Headquarters 18930 West 78th Street Chanhassen, MN 55317 Phone: 800-347-4572 Fax: 952-835-0430 The Bergquist Company European Headquarters Netherlands Phone: 31-35-5380684 Fax: 31-35-5380295 The Bergquist Company Asia Headquarters Hong Kong Phone: 852-2690-9296 Fax: 852-2690-3408 All statements, technical information and recommendations herein are based on tests we believe to be reliable, and THE FOLLOWING IS MADE IN LIEU OF ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MARKETABILITY AND FITNESS FOR PURPOSE. Sellers' and manufacturers' only obligation shall be to replace such quantity of the product proved to be defective. Before using, user shall determine the suitability of the product for its intended use, and the user assumes all risks and liability whatsoever in connection therewith. NEITHER SELLER NOR MANUFACTURER SHALL BE LIABLE EITHER IN TORT OR IN CONTRACT FOR ANY LOSS OR DAMAGE, DIRECT, INCIDENTAL, OR CONSEQUENTIAL, INCLUDING LOSS OF PROFITS OR REVENUE ARISING OUT OF THE USE OR THE INABILITY TO USE A PRODUCT. No statement, purchase order or recommendations by seller or purchaser not contained herein shall have any force or effect unless in an agreement signed by the officers of the seller and manufacturer. PDS_SP K4_1113 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Bergquist Company: SPK4-0.006-00-11512