MP808 / MP825 (TO-126 style) and MP816 / MP850 (TO-220 style) Kool-Pak® Power Film Resistors Page 1 of 2 TO-126 and TO-220 Style Power Packages - Non-Inductive Designs Use your thermal design experience with power semiconductors in the TO-220 and TO-126 style power package. This experience will help you get the most out of this unique family of power resistors. The thermal design issues are the same where power handling capability is based on the case temperature which is maintained in your design. MP825 and MP850 Power Packages Include an Integral Metal Mounting Surface for Highly Efficient Thermal Transfer 25 W atts 50 W atts MP 825 Kool-Pak® Power Resistors MP 850 Kool-Pak® Power Resistors TO-126 Style Power Package TO-220 Style Power Package • • • • 25 Watts at +25°C Case Temperature derated to zero at +150°C Copper Heat Sink Integral in the Molded Package Resistance Range of 0.020 ohm to 10.0K Resistor element is electrically isolated from the mounting surface • • • • 50 Watts at +25°C Case Temperature derated to zero at +150°C Copper Heat Sink Integral in the Molded Package Resistance Range of 0.20 ohm to 10.0K Resistor element is electrically isolated from the mounting surface Construction of MP825 and MP850: The MP825 and MP850 Kool-Pak® Power Film Resistors are constructed with Caddock's Micronox® resistance film fired onto a flat ceramic substrate. The terminal attachment and resistance element geometry are configured to provide outstanding non-inductive performance. The ceramic substrate is bonded to a copper heat sink which becomes the metal mounting surface. This assembly is molded in a high thermal conductivity molding compound with the copper heat sink flush with the back surface of the part. MP808 and MP816 with an All Molded Package Configuration 16 W atts 8W atts MP 808 Kool-Pak® Power Resistors MP 816 Kool-Pak® Power Resistors TO -126 Style Power Package TO-220 Style Power Package • • • • • 8 Watts at +25°C Case Temperature derated to zero at +150°C Thermally Conductive Molded Package Lower Cost Resistance Range of 0.020 ohm to 10.0K Resistor element is electrically isolated from the mounting surface • • • • • 16 Watts at +25°C Case Temperature derated to zero at +150°C Thermally Conductive Molded Package Lower Cost Resistance Range of 0.10 ohm to 10.0K Resistor element is electrically isolated from the mounting surface Construction of MP808 and MP816: The MP808 and MP816 Kool-Pak® Power Film Resistors are constructed with Caddock's Micronox® resistance film fired onto a flat ceramic substrate. The terminal attachment and resistance element geometry are configured to provide outstanding non-inductive performance. The resistor body is completely surrounded by a high thermal conductivity molding compound to finish this cost effective power resistor package. RHOPOINT COMPONENTS LTD. Holland Road Hurst Green Oxted, Surrey, RH8 9AX © 1999 Caddock Electronics, Inc. CADDOCK Tel: +44 (0)1883 717988 Fax: +44 (0)1883 712938 Email: [email protected] Website: www.rhopoint.co.uk/components/ IL-103.039 MP808 / MP825 (TO-126 style) and MP816 / MP850 (TO-220 style) Kool-Pak® Power Film Resistors Model No. Power Rating MP 808 8 Watts * 16 Watts* 25 Watts* 50 Watts* MP 816 MP 825 MP 850 Resistance Min. Max. Package Dimensions Dielect. Strength VRMS AC Max. Voltage TO-126 Style Figure 1 1,500 300 0.020 Ω TO-220 Style Figure 2 1,500 300 0.10 Ω % ∆R Solderable All Molded Package 10.0 K Solderable 300 0.020 Ω 10.0 K Solderable TO-220 Style Figure 2 1,500 300 0.20 Ω 10.0 K Solderable 5.00 ohms and above, -20 to +50 ppm/°C 0.50 ohm to 4.99 ohms, -20 to +80 ppm/°C 0.050 ohm to 0.49 ohm, 0 to +200 ppm/°C 0.020 ohm to 0.049 ohm, 0 to +300 ppm/°C 0 25 100 150 o CASE TEMPERATURE, C case temperature is to be used for purposes of establishing the * The maximum applied power. See Derating Curve. The case temperature measurement is made with the thermocouple contacting the bottom insulated mounting surface of the package (center of bottom surface), the device mounted on a heat sink, thermal grease applied at a mounting torque of up to 8 in-lbs (0.90 N-m) maximum. Without a heat sink, when in free air at +25°C, the MP808 and the MP825 are rated for 1.25 watts, the MP816 and the MP850 are rated for 2.25 watts. DERATING CURVE 100 80 60 Derating ( thermal resistance ) for each MP808: 0.064 W/°C MP816: 0.128 W/°C MP825: 0.200 W/°C MP850: 0.400 W/°C 40 20 0 100 150 o CASE TEMPERATURE, C .320 ±.010 (8.12 ±.26) CL .110 ±.010 (2.79 ±.26) + .080 ±.020 (2.03 ±.51) .115 ±.010 (2.92 ±.26) MP808 0.10 1% .030 ±.004 (.76 ± .10) .200 ±.010 (5.08 ±.26) .125 ±.004 (3.18 ±.10) DIA. .440 ±.010 (11.18 ±.26) .053 ± .007 (1.35 ± .18) .450 ±.050 (11.43 ±1.27) Figure 2 TO-220 Style MP816, MP850 model is as follows: ( 15.63°C/W ) ( 7.81°C/W ) ( 5.00°C/W ) ( 2.50°C/W ) Mounting Note: The MP Kool-Pak® Resistors must be mounted using a screw and compression washer mounting technique. This will provide sufficient pressure on the package over time and through large temperature variations to maintain the maximum power dissipation capability. Mounting torque to avoid package damage is 8 in-lbs (0.90 N-m). .094 ±.004 (2.39 ±.10) DIA. Figure 1 TO-126 Style MP808, MP825 All Molded Package Integral Metal Mounting Surface in Molded Package Integral Metal Mounting Surface in Molded Package Specifications: Temperature Coefficient: TC referenced to +25°C, ∆R taken at +150°C 1 RATED LOAD, % 10.0 K 1,500 (5 Ω and above) 25 Comments Figure 1 TYPICAL TEMPERATURE COEFFICIENT CURVE 55 Terminal TO-126 Style 1 Page 2 of 2 .410 ±.010 (10.41 ±.26) CL .500 ±.050 (12.70 ±1.27) Ordering Information: .640 ±.010 (16.26 ±.26) MP850 10.0 1% .053 ± .007 (1.35 ± .18) .030 ±.004 (.76 ± .10) .200 ±.010 (5.08 ±.26) DIMENSIONS IN INCHES AND (MILLIMETERS) .058 ±.007 (1.47 ±.18) .125 ±.010 (3.18 ±.26) .125 ±.010 (3.18 ±.26) .130 ±.030 (3.30 ±.76) .023 ± .004 (.58 ±.10) .025 ± .004 (.64 ±.10) .070 ±.010 (1.78 ±.26) MP816 - 50.0 - 1% Model Number: Tolerance ResistanceTolerance: ±1% for 0.050Ω up to10.0kΩ, ±5% for 0.020Ω up to 0.049Ω (0.5%, 2%,5%,10% and 20% are available for most resistance values). Insulation Resistance: 10,000 Megohms, min. The resistor element is electrically isolated from the mounting surface. Terminal Strength: Mil-Std-202, Method 211, Cond. A (Pull Test) 5 lbs. MP808, MP816, MP825: ∆R ±(0.2 percent + 0.001 ohm) max. MP850: ∆R ±(0.2 percent + 0.01 ohm) max. Thermal Shock: Mil-Std-202, Method 107, Cond. F. MP808, MP816, MP825: ∆R ±(0.3 percent + 0.001 ohm) max. MP850: ∆R ±(0.3 percent + 0.01 ohm) max. Momentary Overload: MP816 and MP850: 2 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds. MP816: ∆R ±(0.3 percent + 0.001 ohm) max. MP850: ∆R ±(0.3 percent + 0.01 ohm) max. MP808 and MP825: 1.5 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds. MP808, MP825: ∆R ±(0.3 percent + 0.001 ohm) max. Moisture Resistance: Mil-Std-202, Method 106. MP808, MP816, MP825: ∆R ±(0.5 percent + 0.001 ohm) max. MP850: ∆R ±(0.5 percent + 0.01 ohm) max. Load Life: 2,000 hours at rated power. Power rating dependent upon case temperature. See derating curve. MP808, MP816, MP825: ∆R ±(1.0 percent + 0.001 ohm) max. MP850: ∆R ±(1.0 percent + 0.01 ohm) max. Shock: 100G, Mil-Std-202, Method 213, Cond. I. MP808, MP816, MP825: ∆R ±(0.2 percent + 0.001 ohm) max. MP850: ∆R ±(0.2 percent + 0.01 ohm) max. Vibration, High Frequency: Mil-Std-202, Method 204, Cond. D. MP808, MP816, MP825: ∆R ±(0.2 percent + 0.001 ohm) max. MP850: ∆R ±(0.2 percent + 0.01 ohm) max. Measurement Note: For these specifications, resistance measurement shall be made at a point 0.2 inch (5.08 mm) from the resistor body. Resistor Value: RHOPOINT COMPONENTS LTD. Holland Road Hurst Green Oxted, Surrey, RH8 9AX © 1999 Caddock Electronics, Inc. CADDOCK Tel: +44 (0)1883 717988 Tel: +44 (0)1883 717988 Email: [email protected] Website: www.rhopoint.co.uk/components/ IL-103.019