Thick Film High Power Chip Resistors on Aluminum Nitride The ims APX series of thick film high power chip resistors on aluminum nitride is ideal for most applications requiring high power dissipation in a small size package. AlN is an ideal replacement for BeO as it has very high power dissipation with no potential environmental hazards. The "X" designation in each series is a variable that allows for specifying the termination metalization. Please see the ordering information on the back for instructions. Thick film technology provides a stable resistor at a very affordable price. These chip resistors have the following features: * High stability thick film resistor element * AlN substrate material * Au (gold) terminations for wirebonding or epoxy attachment * PtAg (platinum silver) terminations for epoxy or solder attachment * PtAg (platinum silver) with solder coating for solder attachment * Standard tolerance 5%, other tolerances available * Available in bulk or on tape and reel Termination styles Features Very high power dissipation Thick film technology AlN substrate material Terminations available: -1 -3 -C SG - Single wrap with groundplane WA Full Wraparound Au PtAg PtAg with 62/36/2 solder coating Various additional styles are available. Please see reverse. Resistance values from 10 ohms to 2 Kohms Resistance Ranges Standard tolerance 5% The standard resistance range is from 10 ohms to 2 Kohms. Other values are available. Please contact the factory. Tight TCRs A Word About Thermal Management 50 Schoolhouse Lane Portsmouth, RI 02871 Tel (401) 683-9700 Fax (401) 683-5571 e-mail: ims@ims-resistors.com http://www.ims-resistors.com Care must be taken when using chip resistors capable of dissipating large amounts of power. IMS' APX power chips can dissipate large amounts of power for their size. Because of this, thermal management is critical. The CW power ratings listed for the chip resistors on this data sheet are measured using an infinite heatsink. Each chip handled the rated power and still performed well within its stated electrical parameters. Actual performance will depend upon the efficiency with which heat is extracted from the system. Dimensions Part Number APX-0505 APX-0805 APX-1005 APX-1206 APX-2010 APX-2512 APX-2525 APX-3725 Length 0.050 0.080 0.100 0.126 0.197 0.250 0.250 0.375 Width 0.050 0.050 0.050 0.063 0.098 0.120 0.250 0.250 Height 0.020 0.020 0.020 0.020 0.035 0.035 0.035 0.035 Additional sizes and thicknesses available. Please contact factory. Terminal dimensions for full wrap only. Specifications W H L SG W L H WA Maximum Working Voltage E=PR Rated power W Part Number CW Power* APX-0505 APX-0805 APX-1005 APX-1206 APX-2010 APX-2512 APX-2525 APX-3725 L H 20W 30W 40W 50W 60W 70W 150W 250W SS (SB with backplane) W L H *Rating is based upon a maximum film temperature of 150C and a maximum heatsink temperature of 50C. Power is based upon an infinite heatsink. EW Ordering Information Example: 50, 5%, 40W, 1005 Single wrap resistor with groundplane AP Example: AP3 - 1005SG- 50R0 J Form factor 0505 0805 1206 2010 2525 3725 Tolerance J - 5% G - 2% 1 - Gold 3 - Platinum silver C - PtAg with 62/36/2 soldercoating 1005 2512 Specify CS, EW, SS, SB, SG, or WA to indicate termination style desired. W Resistance value The first three digits are significant values. The fourth is the number of zeroes following. The R indicates a decimal point for resistance values less than 100. APX ver.2 09/03 Specifications subject to change without H L CS (1206 and larger) 50 Schoolhouse Lane Portsmouth, RI 02871 Tel (401) 683-9700 Fax (401) 683-5571 e-mail: ims@ims-resistors.com http://www.ims-resistors.com