TO220 35 Watt Thick Film Power Resistors for Surface Mount, Including Metal Tab 4.5mm 7.87mm 1.1mm 0.5 0.5mm 0.5mm Land Pattern 8.6mm 1.5mm 0.5 1.4mm 4.8mm 8.51mm 2.63mm 1.5mm 0.5 0.9mm 3.81mm 0.5mm 1.65mm 2.54mm 5.08mm TO220 style power package for surface mounting applications; 35W power rating at 25C case temperature Soldering note: During surface mount soldering the soldering temperature profile must not cause the metal tab of this device to exceed 245C! PERFORMANCE CHARACTERISTICS Derating Material Lead Material: German Silver (Alpacca) 100% @ 25C to 0% @ 150C curve referenced to case temperature Dielectric Strength 1,800VAC Max. Mounting Torque 0.9Nm Operating Temperature Range -55C to +150C Temperature Coefficient 10 and above, 50ppm/C, referenced to 25C, R taken at +105C. Between 1 and 10, (100ppm+0.002)/C, referenced to 25C,R taken at +105C. Electrical Resistance Range: 0.1 to 10K other values on request Tolerance: 1% to 10% (0.5% on request) Max. Operating Voltage: 350V Insulation Resistance: 10G min. Power Rating: Depends upon case temperature. See Derating Curve. Working Temperature Range: 55C to +175C DERATING 100 35 80 28 60 21 40 14 20 7 Percent Rated Power 10.1mm 45 SPECIFICATIONS * 35 Watt power rating at 25C * SMD - TO-220 package configuration * Heat resistance to cooling plate: Rth <4.28 K/W * A molded case for environmental protection. * Resistor element is electrically insulated from the metal sink tab. 0 0 0 25 50 75 100 125 Case Temperature, C 150 175 Derating (thermal resistance): 0.23W/K (4.28K/W). The case temperature is to be used for purposes of establishing the applied power limit. The case temperature measurement must be made with a thermocouple contacting the center of the component mounted on the designed heat sink. Thermal grease should be applied propperly. ORDERING INFORMATION TEST DATA Load Life (MIL-R-39009, 2,000 hours R (1.0% +0.01) T D H 3 5 P R 1 0 0 J Moisture Resistance (MIL-Std-202, Method 106) R =(0.5% +0.01) max. Style Short Time Overload (2 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds) R (0.3% + 0.01) max. Thermal Shock (MIL-Std-202, Method 107, Cond. F) R =(0.3% + 0.01) max. Terminal Strength (MIL-Std-202, Method 211, Cond. A (Pull Test) 2.4N) R =(0.2% + 0.01) max. Vibration, High Frequency (MIL-STD-202, method 211, cond. A (pull test) 2.4N) R =(0.2% + 0.01) max. 1 Rated Power, W TDH35 Series FEATURES Ohms R = Decimal Example: R100 = 0.10 1R00= 1.0 10K0= 10,000 Tolerance F = 1% J = 5% K = 10% Ohmite Manufacturing Company 3601 Howard St., Skokie, IL 60076 * Tel. 847-675-2600 * Fax 847-675-1505 * www.ohmite.com * ohmite@wwa.com