sales and applications engineering 17271 north umpqua hwy. roseburg, oregon 97470-9422 phone: (541) 496-0700 fax: (541) 496-0408 28_il103.0717 ? 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, and rf applications. mp825 to-126 style power package the mp825 and mp850 kool-pak ? power film resistors are constructed with caddock's micronox ? resistance flm fred onto a fat ceramic substrate. the ceramic substrate is bonded to a copper heat sink which becomes the metal mounting surface. this assembly is molded with the copper heat sink fush with the back surface of the part. the terminal attachment and resistance element geometry are confgured to provide outstanding non-inductive performance. mp825 and mp850 power film resistors include an integral metal mounting surface for highly effcient thermal transfer certain products shown in this catalog are covered by one or more patents, there are also patents pending. mp800 series kool-pak ? power film resistors to-220 style and to-126 style - non-inductive designs ? 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. ? resistor element is electrically isolated from the mounting surface. ? non-inductive design. mp820 and mp821 to-220 style power package with metal mounting tab 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. mp850 - 50.0 - 1% model number: resistor value: tolerance the mp820 and mp821 kool-tab ? power film resistors are constructed with caddock's micronox ? resistance flm fred onto a fat ceramic substrate which is thermally bonded to the copper heat sink tab. the resistor body is then molded with a high temperature molding compound to fnish the metal tab to-220 package. the lead wire attachment and resistance element geometry are confgured to provide outstanding non-inductive performance. for custom resistance values and tolerances contact applications engineering mp825 standard resistance values : 0.020 5% 0.025 5% 0.030 5% 0.033 5% 0.040 5% 0.050 0.075 0.10 0.15 0.20 0.25 tolerance mp825: 1% standard (except as noted), (0.5%, 2%, 5%,10%, and 20% are available for most resistance values). 0.30 0.33 0.40 0.50 0.75 1.00 1.50 2.00 2.50 3.00 3.30 4.00 5.00 7.50 8.00 10.0 12.0 15.0 20.0 25.0 27.0 30.0 33.0 40.0 47.0 50.0 56.0 75.0 100 120 150 200 250 300 330 400 470 500 560 750 1.00 k 1.50 k 2.00 k 2.50 k 3.00 k 3.30 k 4.00 k 5.00 k 7.50 k 10.0 k mp850 standard resistance values : 0.20 0.25 0.30 0.33 0.40 0.50 0.75 1.00 1.50 2.00 2.50 3.00 3.30 4.00 5.00 7.50 8.00 10.0 12.0 15.0 20.0 25.0 27.0 30.0 33.0 40.0 47.0 50.0 56.0 75.0 100 120 150 200 250 300 330 400 470 500 560 750 1.00 k 1.50 k 2.00 k tolerance mp850: 1% standard, (0.5%, 2%, 5%,10%, and 20% are available for most resistance values). 2.50 k 3.00 k 3.30 k 4.00 k 5.00 k 7.50 k 10.0 k ? 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. construction of mp825 and mp850: ordering information: construction of mp820 and mp821: mp850 to-220 style power package mp821 standard resistance values: 0.020 0.025 0.030 0.033 0.040 tolerance mp821: 1% standard (0.5%, 2%, 5%, 10%, and 20% are available for most resistance values). 0.050 0.075 0.10 0.15 0.20 0.25 0.30 0.33 0.40 0.50 0.75 1.00 1.50 2.00 2.50 3.00 3.30 4.00 5.00 7.50 8.00 mp820 standard resistance values: 10.0 12.0 15.0 20.0 25.0 27.0 tolerance mp820: 1% standard (0.5%, 2%, 5%, 10%, and 20% are available for most resistance values). 30.0 33.0 40.0 47.0 50.0 56.0 75.0 100 120 150 200 250 300 330 400 470 500 560 750 1.00 k 1.50 k 2.00 k 2.50 k 3.00 k 3.30 k 4.00 k 5.00 k 7.50 k 10.0 k packaging: mp800 series resistors are packaged in plastic shipping tubes, 50 pieces per tube when the order quantity permits. page 1 of 2 ? 2003-2017 caddock electronics, inc. e-mail: caddock@caddock.com ? web: www.caddock.com for caddock distributors listed by country see caddock.com/contact/dist.html electronics, inc.
28_il103.0717 sales and applications engineering 17271 north umpqua hwy. roseburg, oregon 97470-9422 phone: (541) 496-0700 fax: (541) 496-0408 dimensions in inches and (millimeters) .640 .010 (16.26 .26) .030 .004 (.76 .10) .025 .004 (.64 .10) .200 .010 (5.08 .26) .500 .050 (12.70 1.27) .130 .030 (3.30 .76) .125 .010 (3.18 .26) .410 .010 (10.41 .26) mp850 10.0 1% .125 .010 (3.18 .26) .125 .004 (3.18 .10) dia. c l .053 .007 (1.35 .18) .070 .010 (1.78 .26) figure 2 to-126 style mp825 figure 1 metal tab to-220 style mp820 and mp821 mp820 50.0 1% .540 .040 (13.72 1.02) c l .117 .003 (2.97 .08) .240 .010 (6.10 .26) .400 .010 (10.16 .26) .200 .010 (5.08 .26) .032 .004 dia. (.81 .10) .175 .015 (4.45 .38) .052 .003 (1.32 .08) .580 .010 (14.73 .26) .097 .010 (2.46 .26) .142 .003 (3.61 .08) dia. figure 3 to-220 style mp850 all power and associated overload ratings are derated based upon case temperature using the derating curve. the case temperature is measured at the center of the metal mounting surface, with the part properly mounted and under electrical load. without a heat sink, when in free air at +25c, the mp820, mp821, and mp850 are rated for 2.25 watts, the mp825 is rated for 1.25 watts. the thermal design should satisfy the following equation: case temperature (t c ) + [thermal resistance (r jc [srhudssolhg:dwwv7 max considering the full operating temperature range of the application. mounting note: 0rxqwrqdvprrwkfohdqdqgdwkhdwvlqnvxuidfhzlwkdwkhupdolqwhuidfhpdwhuldovxfk as thermal grease. the entire exposed metal backface portion must be in thermal contact with the heat sink. when screw mounting, use a compression washer which provides a mounting force of 150 to 300 pounds wr17klvloosurlghvxiflhqwsuhvvxuhrqwkhsdfndjhrhuwlphdqgwkurxjkodujhwhpshudwxuh 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 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. for additional applications information regarding mounting and pulse handling see the caddock applications notes at caddock.com or contact applications engineering. * derating using case temperature (t c ): derating curve mp821 mp820 model no. comments integral metal mounting surface in molded package mp850 integral metal mounting surface in molded package mp825 metal mounting tab metal mounting tab to-220 style to-220 style package to-220 style to-126 style 0.020 9.99 10.0 10.0 k min. max. resistance 0.20 10.0 k 0.020 10.0 k 20 watts * 20 watts * power rating 50 watts * 25 watts * max.vo ltage power limited 300 300 300 thermal resistance r jc film ( j ) to case ( c ) 7.50c/watt 5.00c/watt 2.50c/watt 7.50c/watt 175c figure 1 figure 1 dimensions figure 3 figure 2 max. temp. t max 175c 150c 150c + .030 .004 (.76 .10) .023 .004 (.58 .10) .200 .010 (5.08 .26) .450 .050 (11.43 1.27) .115 .010 (2.92 .26) mp825 0.10 1% .110 .010 (2.79 .26) .053 .007 (1.35 .18) .058 .007 (1.47 .18) .320 ( .010 (8.12 .26) .094 .004 (2.39 .10) dia. c l .440 .010 (11.18 .26) .080 .020 (2.03 .51) 6 s h f l f d w l r q v 7 h p s h u d w x u h & r h i f l h q w tc referenced to +25c, ? r taken at t max 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 operating temperature: -55c to t max inductance: 10nh typical in series when mea- sured at a point 0.2 inches from the resistor body. dwv: the dielectric strength rating of 1500 v rms ac is based upon connections made between terminals shorted and either the metal surface the part is mounted to or a metal clip in contact with the top surface of the part. insulation resistance: 10,000 megohms, min. the resistor element is electrically isolated from the mounting surface. load stability: 2,000 hours at rated power. ? r (1.0 percent + 0.001 ohm) max. power rating dependent upon case temperature. see derating curve. momentary overload: mp820, mp821, mp850: 2 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds. ? r (0.3 percent + 0.001 ohm) max. mp825: 1.5 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds. ? r (0.3 percent + 0.001 ohm) max. moisture resistance: mil-std-202, method 106. ? r (0.5 percent + 0.001 ohm) max. thermal shock: mil-std-202, method 107, cond. f. ? r (0.3 percent + 0.001 ohm) max. shock: 100g, mil-std-202, method 213, cond. i. ? r (0.2 percent + 0.001 ohm) max. vibration, high frequency: mil-std-202, method 204, cond. d. ? r (0.2 percent + 0.001 ohm) max. terminal strength: mil-std-202, method 211, cond. a (pull test) 5 lbs. ?r (0.2 percent + 0.001 ohm) max. terminal material: solderable measurement note: )ru wkhvh vshflfdwlrqv resistance measurement shall be made at a point 0.2 inch (5.08 mm) from the resistor body. 100 175 0 20 40 100 power rating, % 80 60 150 a b 25 a - mp825 / mp850 max. temperature, t max = 150c b - mp820 / mp821 max. temperature, t max = 175c case temperature, c page 2 of 2 ? 2003-2017 caddock electronics, inc. e-mail: caddock@caddock.com ? web: www.caddock.com for caddock distributors listed by country see caddock.com/contact/dist.html electronics, inc.
|
