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. Non-Inductive design for high speed switching, snubbers, MP821 Standard Resistance Values: and rf applications. Tolerance MP821: 1% Standard (0.5%, 5%, and 20% are available for most resistance values). Construction of MP820 and MP821: 0.020 0.050 0.25 0.75 3.00 7.50 0.025 0.075 0.30 1.00 3.30 8.00 The MP820 and MP821 Kool-Tab Power Film Resistors are constructed with Caddock s 0.030 0.10 0.33 1.50 4.00 0.033 0.15 0.40 2.00 5.00 Micronox resistance film fired onto a flat ceramic substrate which is thermally bonded to 0.040 0.20 0.50 2.50 the copper heat sink tab. The resistor body is then molded with a high temperature MP820 Standard Resistance Values: molding compound to finish the metal tab TO-220 package. The lead wire attachment Tolerance MP820: 1% Standard (0.5%, 5%, and 20% are and resistance element geometry are configured to provide outstanding non-inductive 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 Efficient 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%, Non-inductive Design. 5%, 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 film fired onto a flat 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 flush with the back surface of the part. The 0.10 2.00 20.0 120 1.00 K 0.15 2.50 25.0 150 1.50 K terminal attachment and resistance element geometry are configured to provide 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: MP850 - 50.0 - 1% Tolerance MP850: 1% standard, (0.5%, 5%, and 20% are Ordering Information: available for most resistance values). Model Number: Tolerance 2.50 K 0.20 2.00 12.0 50.0 330 Resistor Value: 0.25 2.50 15.0 56.0 400 3.00 K 3.30 K 0.30 3.00 20.0 75.0 470 0.33 3.30 25.0 100 500 4.00 K Packaging: MP800 Series Resistors are packaged in plastic shipping tubes, 5.00 K 0.40 4.00 27.0 120 560 50 pieces per tube when the order quantity permits. 0.50 5.00 30.0 150 750 7.50 K 10.0 K 0.75 7.50 33.0 200 1.00 K For custom resistance values and tolerances contact applications engineering 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. Sales and Applications Engineering 17271 North Umpqua Hwy. ELECTRONICS, INC. Roseburg, Oregon 97470-9422 e-mail: caddock caddock.com web: www.caddock.com Phone: (541) 496-0700 For Caddock Distributors listed by country see caddock.com/contact/dist.html Fax: (541) 496-0408 2003-2020 Caddock Electronics, Inc. 28 IL103.0420Page 2 of 2 Thermal Resistance Resistance Model Max.Vo Power Max. Temp. R Package JC Dimensions Comments No. ltage Rating T MAX Min. Max. Film (J) to Case (C) Metal Mounting Tab MP820 TO-220 Style 10.0 K 300 Figure 1 10.0 175C 20 Watts* 7.50C/Watt Power Figure 1 Metal Mounting Tab MP821 TO-220 Style 0.020 9.99 20 Watts* 7.50C/Watt 175C Limited Integral Metal Mounting Surface MP825 Figure 2 TO-126 Style 10.0 K 300 0.020 5.00C/Watt 150C 25 Watts* in Molded Package Integral Metal Mounting Surface MP850 TO-220 Style 10.0 K 300 Figure 3 0.20 150C 2.50C/Watt 50 Watts* in Molded Package Derating Curve Specifications: 100 80 Derating Using Case Temperature (T ): Temperature Coefficient: * C 60 TC referenced to +25C, R taken at T All power and associated overload ratings are derated MAX based upon case temperature using the derating curve. 40 The case temperature is measured at the center of the 5.00 ohms and above, -20 to +50 ppm/C A B 20 metal mounting surface, with the part properly mounted 0.50 ohm to 4.99 ohms, -20 to +80 ppm/C and under electrical load. Without a heat sink, when in 0 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 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. CASE TEMPERATURE, C A - MP825 / MP850 Max. Temperature, TMax = 150C Operating Temperature: -55C to T B - MP820 / MP821 Max. Temperature, TMax = 175C MAX The thermal design should satisfy the following equation: Inductance: 10nH typical in series when mea- Case Temperature (T ) + Thermal Resistance (R ) x power applied (Watts) T considering the full c JC MAX sured at a point 0.2 inches from the resistor body. operating temperature range of the application. Mounting Note: Mount on a smooth, clean and flat heat sink surface with a thermal interface material, such DWV: The dielectric strength rating of 1500 V AC rms as thermal grease. The entire exposed metal backface portion must be in thermal contact with the heat sink. is based upon connections made between When screw mounting, use a compression washer which provides a mounting force of 150 to 300 pounds terminals shorted and either the metal surface the (665 to 1330 N). This will provide sufficient pressure on the package over time and through large temperature part is mounted to or a metal clip in contact with the variations to maintain the maximum power dissipation capability. Mounting torque to avoid package damage 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 Insulation Resistance: 10,000 Megohms, min. a pressure bar method which can achieve a greater mounting force with a greater contact area. 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 power. R (1.0 percent + 0.001 ohm) max. Power rating .400 .010 .142 .003 .175 .015 (10.16 .26) (3.61 .08) DIA. (4.45 .38) dependent upon case temperature. See derating .052 .003 C L (1.32 .08) curve240 .010 (6.10 .26) Momentary Overload: .580 .010 .117 .003 Figure 1 (14.73 .26) MP820, MP821, MP850: 2 times rated power with (2.97 .08) MP820 Metal Tab 50.0 applied voltage not to exceed 1.5 times maximum 1% TO-220 Style continuous operating voltage for 5 seconds. R (0.3 percent + 0.001 ohm) max. MP820 and MP821 .540 .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 MP825 .115 .010 (2.03 .51) 0.10 (2.92 .26) Thermal Shock: Mil-Std-202, Method 107, Cond. 1% MP825 .053 .007 F. 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 .125 .004 .410 .010 204, Cond. D. R (0.2 percent + 0.001 ohm) (3.18 .10) DIA. (10.41 .26) .125 .010 C (3.18 .26) max. L Terminal Strength: Mil-Std-202, Method 211, Figure 3 .640 .010 .125 .010 Cond. A (Pull Test) 5 lbs. R (0.2 percent (16.26 .26) (3.18 .26) TO-220 Style MP850 .130 .030 + 0.001 ohm) max. 10.0 (3.30 .76) MP850 1% .053 .007 Terminal Material: Solderable (1.35 .18) .500 .050 .030 .004 (12.70 1.27) (.76 .10) Measurement Note: For these specifications, resistance measurement shall be made at a point .025 .004 .200 .010 (.64 .10) (5.08 .26) 0.2 inch (5.08 mm) from the resistor body070 .010 (1.78 .26) DIMENSIONS IN INCHES AND (MILLIMETERS) Sales and Applications Engineering 17271 North Umpqua Hwy. ELECTRONICS, INC. Roseburg, Oregon 97470-9422 e-mail: caddock caddock.com web: www.caddock.com Phone: (541) 496-0700 For Caddock Distributors listed by country see caddock.com/contact/dist.html Fax: (541) 496-0408 2003-2020 Caddock Electronics, Inc. 28 IL103.0420 POWER RATING, %