MP800 Series Kool-Pak Power Film Resistors TO-220 Style and TO-126 Style - Non-Inductive Designs Page 1 of 2 Use your thermal design experience with power semiconductors in TO-220 and TO-126 style power packages to 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. MP820 and MP821 TO-220 Style Power Package with Metal Mounting Tab 20 Watts at +25C Case Temperature derated to zero at +175C. Metal Heat Sink Mounting Tab. MP820 Resistance Range of 10.0 ohm to 10.0 K. MP821 Resistance Range of 0.020 ohm to 9.99 ohm. Resistor element is electrically isolated from the mounting surface. MP821 Standard Resistance Values: Non-Inductive design for high speed switching, snubbers, Tolerance MP821: 1% Standard (0.5%, 2%, 5%, 10%, and 20% and rf applications. are available for most resistance values). 0.020 0.050 0.25 0.75 3.00 7.50 Construction of MP820 and MP821: 0.025 0.075 0.30 1.00 3.30 8.00 0.030 0.10 0.33 1.50 4.00 The MP820 and MP821 Kool-Tab Power Film Resistors are constructed with Caddock s 0.033 0.15 0.40 2.00 5.00 0.040 0.20 0.50 2.50 Micronox resistance lm red onto a at ceramic substrate which is thermally bonded to the copper heat sink tab. The resistor body is then molded with a high temperature MP820 Standard Resistance Values: molding compound to nish the metal tab TO-220 package. The lead wire attachment Tolerance MP820: 1% Standard (0.5%, 2%, 5%, 10%, and 20% and resistance element geometry are congured to provide outstanding non-inductive are available for most resistance values). performance. 10.0 30.0 75.0 300 750 3.30 K 12.0 33.0 100 330 1.00 K 4.00 K 15.0 40.0 120 400 1.50 K 5.00 K 20.0 47.0 150 470 2.00 K 7.50 K MP825 and MP850 Power Film Resistors 25.0 50.0 200 500 2.50 K 10.0 K 27.0 56.0 250 560 3.00 K Include an Integral Metal Mounting Surface for Highly Efcient Thermal Transfer MP825 TO-126 Style Power Package 25 Watts at +25C Case Temperature derated to zero at +150C. Copper Heat Sink Integral in the Molded Package. Resistance Range of 0.020 ohm to 10.0 K. Resistor element is electrically isolated from the mounting surface. Non-inductive Design. MP850 TO-220 Style Power Package 50 Watts at +25C Case Temperature derated to zero at +150C. Copper Heat Sink Integral in the Molded Package. Resistance Range of 0.20 ohm to 10.0 K. MP825 Standard Resistance Values: Resistor element is electrically isolated from the mounting surface. Tolerance MP825: 1% standard (except as noted), (0.5%, 2%, Non-inductive Design. 5%,10%, and 20% are available for most resistance values). 0.020 5% 0.30 4.00 33.0 300 3.00 K Construction of MP825 and MP850: 0.025 5% 0.33 5.00 40.0 330 3.30 K 0.030 5% 0.40 7.50 47.0 400 4.00 K The MP825 and MP850 Kool-Pak Power Film Resistors are constructed with Caddock s 0.033 5% 0.50 8.00 50.0 470 5.00 K Micronox resistance lm red onto a at ceramic substrate. The ceramic substrate is 0.040 5% 0.75 10.0 56.0 500 7.50 K 0.050 1.00 12.0 75.0 560 10.0 K bonded to a copper heat sink which becomes the metal mounting surface. This 0.075 1.50 15.0 100 750 assembly is molded with the copper heat sink ush with the back surface of the part. The 0.10 2.00 20.0 120 1.00 K terminal attachment and resistance element geometry are congured to provide 0.15 2.50 25.0 150 1.50 K 0.20 3.00 27.0 200 2.00 K outstanding non-inductive performance. 0.25 3.30 30.0 250 2.50 K MP850 Standard Resistance Values: Ordering Information: MP850 - 50.0 - 1% Tolerance MP850: 1% standard, (0.5%, 2%, 5%,10%, and 20% are available for most resistance values). Model Number: Tolerance 2.50 K 0.20 2.00 12.0 50.0 330 Resistor Value: 3.00 K 0.25 2.50 15.0 56.0 400 3.30 K 0.30 3.00 20.0 75.0 470 Packaging: MP800 Series Resistors are packaged in plastic shipping tubes, 4.00 K 0.33 3.30 25.0 100 500 50 pieces per tube when the order quantity permits. 5.00 K 0.40 4.00 27.0 120 560 7.50 K 0.50 5.00 30.0 150 750 For custom resistance values and tolerances contact applications engineering 10.0 K 0.75 7.50 33.0 200 1.00 K 1.00 8.00 40.0 250 1.50 K 1.50 10.0 47.0 300 2.00 K Certain products shown in this catalog are covered by one or more patents, there are also patents pending. Applications Engineering Sales and Corporate Ofce 17271 North Umpqua Hwy. 1717 Chicago Avenue CADDOCK Roseburg, Oregon 97470-9422 Riverside, California 92507-2364 e-mail: caddock caddock.com web: www.caddock.com Phone: (541) 496-0700 Phone: (951) 788-1700 For Caddock Distributors listed by country see caddock.com/contact/dist.html Fax: (541) 496-0408 Fax: (951) 369-1151 2004 Caddock Electronics, Inc. 28 IL103.1004Page 2 of 2 Thermal Resistance Resistance Model Power Max. Max. Temp. R Package JC Dimensions Comments No. Rating Voltage Min. Max. T MAX Film (J) to Case (C) Metal Mounting Tab MP820 TO-220 Style 10.0 10.0 K 20 Watts* 300 175 C Figure 1 7.50C/Watt Power MP821 TO-220 Style 0.020 9.99 20 Watts* 7.50C/Watt 175 C Figure 1 Metal Mounting Tab Limited Integral Metal Mounting Surface MP825 0.020 25 Watts* Figure 2 TO-126 Style 10.0 K 300 5.00C/Watt 150 C in Molded Package Integral Metal Mounting Surface MP850 TO-220 Style 0.20 10.0 K 150 C Figure 3 50 Watts* 300 2.50C/Watt in Molded Package Derating Curve Specications: 100 80 Derating Using Case Temperature (T ): Temperature Coefcient: * C 60 TC referenced to +25C, R taken at T All power and associated overload ratings are derated MAX 40 based upon case temperature using the derating curve. A The case temperature is measured at the center of the 5.00 ohms and above, -20 to +50 ppm/C B 20 metal mounting surface, with the part properly mounted 0.50 ohm to 4.99 ohms, -20 to +80 ppm/C 0 and under electrical load. Without a heat sink, when in 0.050 ohm to 0.49 ohm, 0 to +200 ppm/C 25 100 150 175 free air at +25C, the MP820, MP821, and MP850 are CASE TEMPERATURE, C 0.020 ohm to 0.049 ohm, 0 to +300 ppm/C rated for 2.25 watts, the MP825 is rated for 1.25 watts. A - MP825 / MP850 Max. Temperature, TMax = 150 C B - MP820 / MP821 Max. Temperature, TMax = 175 C Operating Temperature: -55C to T MAX The thermal design should satisfy the following equation: Case Temperature (T ) + Thermal Resistance (R ) x power applied (Watts) T considering the full Inductance: 10nH typical in series when mea- c JC MAX operating temperature range of the application. sured at a point 0.2 inches from the resistor body. Mounting Note: Mount on a smooth, clean and at heat sink surface with a thermal interface material, such as thermal grease. The entire exposed metal backface portion must be in thermal contact with the heat sink. DWV: The dielectric strength rating of 1500 V AC rms When screw mounting, use a compression washer which provides a mounting force of 150 to 300 pounds is based upon connections made between (665 to 1330 N). This will provide sufcient pressure on the package over time and through large temperature terminals shorted and either the metal surface the variations to maintain the maximum power dissipation capability. Mounting torque to avoid package damage part is mounted to or a metal clip in contact with the is 8 in-lbs (0.90 N-m). If a spring clip is used, a clip force of 8 to 30 pounds (35 to 130 N) is recommended to top surface of the part. be applied to the center of the package. The clip should be round or smooth in the contact area to avoid concentrating the load on a small point of the plastic body of the package. Another mounting option is to use a pressure bar method which can achieve a greater mounting force with a greater contact area. Insulation Resistance: 10,000 Megohms, min. The resistor element is electrically isolated from For additional applications information regarding mounting and pulse handling see the Caddock the mounting surface. Applications Notes at caddock.com or contact Applications Engineering. Load Stability: 2,000 hours at rated power400 .010 .142 .003 .175 .015 R (1.0 percent + 0.001 ohm) max. Power rating (10.16 .26) (3.61 .08) DIA. (4.45 .38) dependent upon case temperature. See derating .052 .003 C (1.32 .08) L curve240 .010 (6.10 .26) Momentary Overload: .580 .010 Figure 1 .117 .003 (14.73 .26) (2.97 .08) MP820, MP821, MP850: 2 times rated power with MP820 Metal Tab 50.0 applied voltage not to exceed 1.5 times maximum 1% TO-220 Style continuous operating voltage for 5 seconds. MP820 and MP821 R (0.3 percent + 0.001 ohm) max540 .040 .032 .004 DIA. (13.72 1.02) (.81 .10) MP825: 1.5 times rated power with applied voltage not to exceed 1.5 times maximum .200 .010 .097 .010 (5.08 .26) (2.46 .26) continuous operating voltage for 5 seconds. R (0.3 percent + 0.001 ohm) max094 .004 .320 .010 .110 .010 (2.39 .10) DIA. (8.12 .26) (2.79 .26) C L Moisture Resistance: Mil-Std-202, Method 106. + R (0.5 percent + 0.001 ohm) max. Figure 2 .440 .010 (11.18 .26) TO-126 Style .080 .020 .115 .010 MP825 (2.03 .51) 0.10 (2.92 .26) Thermal Shock: Mil-Std-202, Method 107, Cond. F. 1% MP825 .053 .007 R (0.3 percent + 0.001 ohm) max. (1.35 .18) .450 .050 (11.43 1.27) .030 .004 Shock: 100G, Mil-Std-202, Method 213, Cond. I. (.76 .10) R (0.2 percent + 0.001 ohm) max023 .004 (.58 .10) .200 .010 (5.08 .26) .058 .007 (1.47 .18) Vibration, High Frequency: Mil-Std-202, Method .410 .010 .125 .004 204, Cond. D. R (0.2 percent + 0.001 ohm) (10.41 .26) (3.18 .10) DIA125 .010 max. (3.18 .26) C L Terminal Strength: Mil-Std-202, Method 211, Figure 3 .640 .010 .125 .010 Cond. A (Pull Test) 5 lbs. R (0.2 percent TO-220 Style (16.26 .26) (3.18 .26) MP850 + 0.001 ohm) max130 .030 MP850 10.0 (3.30 .76) 1% Terminal Material: Solderable .053 .007 (1.35 .18) .500 .050 .030 .004 (12.70 1.27) (.76 .10) Measurement Note: For these specications, resistance measurement shall be made at a point .025 .004 .200 .010 (.64 .10) 0.2 inch (5.08 mm) from the resistor body. (5.08 .26) DIMENSIONS IN INCHES AND (MILLIMETERS) .070 .010 (1.78 .26) Applications Engineering Sales and Corporate Ofce 17271 North Umpqua Hwy. 1717 Chicago Avenue CADDOCK Roseburg, Oregon 97470-9422 Riverside, California 92507-2364 e-mail: caddock caddock.com web: www.caddock.com Phone: (541) 496-0700 Phone: (951) 788-1700 For Caddock Distributors listed by country see caddock.com/contact/dist.html Fax: (541) 496-0408 Fax: (951) 369-1151 2004 Caddock Electronics, Inc. 28 IL103.1004 POWER RATING, %