CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor * * * Features: * * * * * Resistive Product Solutions High power metal alloy current sense resistor Very low inductance (0.5nH to 5nH) High temperature performance up to 225C; for operation up to 275C, contact factory Excellent frequency response Low thermal EMF (<1V/C) Proprietary processing technique produces extremely low resistance values All the CSS package sizes and the CSSH2512 package size are qualified to AEC-Q200 RoHS compliant / lead-free Electrical Specifications Type / Code Maximum Power Rating (Watts) Maximum Rating Current (A) Maximum Overload Current (A) TCR (ppm/C) CSS0603(*) 0.33 8.1 16.2 50 ppm/C 0.5% - 1%, 2%, 5% 0.005, 0.01, 0.015 (*) 0.5 12.9 25.8 50 ppm/C - 0.005, 0.01, 0.015 (*) 1 31.62 63.25 50 ppm/C 25 ppm/C 15 ppm/C 0.007 - 0.015 0.016 - 0.05 0.001 - 0.004 0.005 - 0.015 0.016 - 0.05 0.001 - 0.003 0.004 - 0.006 0.007 - 0.1 CSS0805 CSS1206 Ohmic Range () and Tolerance CSS2010 (*) 1 31.62 63.25 50 ppm/C 25 ppm/C 15 ppm/C 0.007 - 0.1 CSS2512(*) 2 63.25 141.42 50 ppm/C 25 ppm/C 15 ppm/C 0.007 - 0.075 0.0005 - 0.003 0.004 - 0.006 0.007 - 0.075 3 77.46 134.16 50 ppm/C 25 ppm/C 0.007 - 0.01 0.0005 - 0.0025 0.003 - 0.01 CSS2725 (*) 4 126.49 252.95 50 ppm/C - CSS2728(*) 3 27.39 47.43 25 ppm/C 15 ppm/C 0.004 - 0.007 0.008 - 0.1 0.004 - 0.007 0.008 - 0.1 CSSH2728 4 31.62 63.25 25 ppm/C 15 ppm/C 0.004 - 0.007 0.008 - 0.05 0.004 - 0.007 0.008 - 0.05 CSS4527(*) 5 100 173 50 ppm/C 0.007 - 0.12 (*) CSSH2512 0.00025 - 0.003 0.0005 - 0.12 (*) Qualified to AEC-Q200 Please refer to the High Power Resistor Application Note (page 5) for more information on designing and implementing high power resistor types. Rev Date: 10/01/2015 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 1 www.seielect.com marketing@seielect.com CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Mechanical Specifications Type/Code Maximum Power Rating (Watts) Resistance Range () L W H a b Unit CSS0603 0.33 0.005, 0.01, 0.015 0.063 0.008 1.60 0.20 0.031 0.008 0.80 0.20 0.012 0.004 0.30 0.10 0.012 0.006 0.30 0.15 0.012 0.006 0.30 0.15 CSS0805 0.5 0.005, 0.01, 0.015 0.080 0.008 2.03 0.20 0.050 0.008 1.27 0.20 0.012 0.004 0.30 0.10 0.014 0.008 0.35 0.20 0.014 0.008 0.35 0.20 CSS1206 1 0.001 - 0.05 0.126 0.010 3.20 0.25 0.063 0.010 1.60 0.25 0.025 0.010 0.65 0.25 0.020 0.010 0.51 0.25 0.020 0.010 0.51 0.25 0.001 - 0.003 0.200 0.010 5.08 0.25 0.100 0.010 2.54 0.25 0.031 0.010 0.79 0.25 0.051 0.010 1.30 0.25 0.051 0.010 1.30 0.25 0.0031 - 0.1 0.200 0.010 5.08 0.25 0.100 0.010 2.54 0.25 0.025 0.010 0.65 0.25 0.031 0.010 0.79 0.25 0.031 0.010 0.79 0.25 0.0005 - 0.004 0.246 0.010 6.25 0.25 0.130 0.010 3.30 0.25 0.031 0.010 0.79 0.25 0.074 0.010 1.88 0.25 0.074 0.010 1.88 0.25 0.0041 - 0.075 0.246 0.010 6.25 0.25 0.130 0.010 3.30 0.25 0.025 0.010 0.65 0.25 0.044 0.010 1.12 0.25 0.044 0.010 1.12 0.25 0.0005 0.246 0.010 6.25 0.25 0.130 0.010 3.30 0.25 0.031 0.010 0.79 0.25 0.074 0.010 1.88 0.25 0.074 0.010 1.88 0.25 0.0006 - 0.0029 0.0041 - 0.01 0.246 0.010 6.25 0.25 0.130 0.010 3.30 0.25 0.031 0.010 0.79 0.25 0.044 0.010 1.12 0.25 0.044 0.010 1.12 0.25 0.003 - 0.004 0.246 0.010 6.25 0.25 0.130 0.010 3.30 0.25 0.031 0.010 0.79 0.25 0.066 0.010 1.68 0.25 0.066 0.010 1.68 0.25 0.00025, 0.0005 0.268 0.010 6.81 0.25 0.254 0.010 6.45 0.25 0.039 0.010 0.99 0.25 0.085 0.010 2.16 0.25 0.085 0.010 2.16 0.25 0.001 0.268 0.010 6.81 0.25 0.254 0.010 6.45 0.25 0.043 0.010 1.09 0.25 0.085 0.010 2.16 0.25 0.085 0.010 2.16 0.25 0.0015 0.268 0.010 6.81 0.25 0.254 0.010 6.45 0.25 0.039 0.010 0.99 0.25 0.085 0.010 2.16 0.25 0.085 0.010 2.16 0.25 0.002 0.268 0.010 6.81 0.25 0.254 0.010 6.45 0.25 0.035 0.010 0.89 0.25 0.071 0.010 1.80 0.25 0.071 0.010 1.80 0.25 0.0025 0.268 0.010 6.81 0.25 0.254 0.010 6.45 0.25 0.035 0.010 0.89 0.25 0.065 0.010 1.65 0.25 0.065 0.010 1.65 0.25 0.003 0.268 0.010 6.81 0.25 0.254 0.010 6.45 0.25 0.035 0.010 0.89 0.25 0.051 0.010 1.30 0.25 0.051 0.010 1.30 0.25 inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm CSS2010 CSS2512 CSSH2512 CSS2725 1 2 3 4 CSS2728 3 0.004 - 0.1 0.264 0.010 6.71 0.25 0.283 0.010 7.19 0.25 0.039 0.010 0.99 0.25 0.045 0.010 1.14 0.25 0.045 0.010 1.14 0.25 CSSH2728 4 0.004 - 0.1 0.264 0.010 6.71 0.25 0.283 0.010 7.19 0.25 0.039 0.010 0.99 0.25 0.045 0.010 1.14 0.25 0.045 0.010 1.14 0.25 CSS4527 5 0.450 11.43 0.450 11.43 0.270 6.85 0.270 6.85 0.059 1.50 0.059 1.50 0.038 0.97 0.038 0.97 0.127 3.22 0.071 1.82 0.0005 - 0.005 0.0051 - 0.1 Rev Date: 10/01/2015 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 0.010 0.25 0.010 0.25 2 0.010 0.25 0.010 0.25 0.010 0.25 0.010 0.25 0.010 0.25 0.010 0.25 0.010 0.25 0.010 0.25 www.seielect.com marketing@seielect.com CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Solder Pad Dimensions Type/Code Maximum Power Rating (Watts) Resistance Range () CSS0603 0.33 0.005, 0.01, 0.015 CSS0805 0.5 0.005, 0.01, 0.015 CSS1206 1 0.001 - 0.05 CSS2010 1 0.001 - 0.003 0.0031 - 0.1 0.0005 - 0.004 CSS2512 2 0.0041 - 0.075 0.0005 CSSH2512 3 0.0006 - 0.0029 0.0041 - 0.01 0.003 - 0.004 CSS2725 4 0.00025 - 0.003 CSS2728 3 0.004 - 0.1 CSSH2728 4 0.004 - 0.1 CSS4527 5 0.0005 - 0.005 0.0051 - 0.12 Rev Date: 10/01/2015 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 3 a b i Unit 0.039 1.00 0.071 1.80 0.063 1.60 0.114 2.89 0.090 2.29 0.120 3.05 0.083 2.11 0.120 3.05 0.086 2.19 0.110 2.79 0.125 3.18 0.108 2.75 0.108 2.75 0.189 4.80 0.134 3.40 0.050 1.27 0.086 2.18 0.086 2.18 0.115 2.92 0.115 2.92 0.145 3.68 0.145 3.68 0.145 3.68 0.145 3.68 0.145 3.68 0.270 6.86 0.308 7.82 0.308 7.82 0.344 8.74 0.344 8.74 0.020 0.50 0.026 0.66 0.039 1.00 0.048 1.22 0.095 2.41 0.050 1.27 0.125 3.18 0.050 1.27 0.118 3.00 0.071 1.80 0.052 1.32 0.138 3.51 0.138 3.51 0.217 5.51 0.327 8.31 inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm www.seielect.com marketing@seielect.com CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Power Derating Curve: 100 Resistive Product Solutions -55C 70C 100C Power Load (%) 80 60 CSS0603, CSS0805 All other sizes 40 20 0 -60 225 0 50 100 150 200 250 Ambient Temperature (C) Performance Characteristics Test Item Condition of Test Temperature Coefficient of Resistance (TCR) Short Time Overload (rating power duration = 5 seconds) Test Method Test Limits JIS C 5201-1 4.8 Per specification (refer to Electrical Specification table) TCR (ppm/C) R1: resistance of room temperature (T1) R2: resistance of 150C (T2) The number of rated power are as follows: CSS0603-0.33W: 4 times rated power CSS0805-0.5W: 4 times rated power CSS1206-1W: 4 times rated power CSS2010-1W: 4 times rated power CSS2512-2W: 5 times rated power CSSH2512-3W: 3 times rated power CSS2725-4W: 4 times rated power CSS2728-3W: 3 times rated power CSSH2728-4W: 4 times rated power CSS4527-5W: 3 times rated power (R/R1) 0.5% JIS C 5201-1 4.13 (R/R1) 2% 9 JIS C 5201-1 4.6 10015V DC for 1 minute 10 Applied 500V AC for 1 minute and Dielectric Withstanding Voltage JIS C 5201-1 4.7 Without break down limit surge current 50mA (max) Operating Temperature Range for sizes 0603 and 0805: -55C to +150C. Contact factory for operation at higher temperatures. Operating Temperature Range for all other sizes: -55C to +225C. Contact factory for operation at higher temperatures. Insulation Resistance How to Order 1 2 3 4 5 6 7 8 9 10 11 12 13 C S S 2 7 2 5 F T 3 L 0 0 Product Series CSS Metal Alloy CSSH High Power Size 0603 0805 1206 2010 2512 (H)2512 2725 2728 (H)2728 4527 Power 0.33W 0.5W 1W 1W 2W 3W 4W 3W 4W 5W Tolerance Code Tol D 0.5% F 1% G 2% J 5% Rev Date: 10/01/2015 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Packaging Code Description T 7" Reel - Plastic Tape 4 Size 0603, 0805 1206 2010, 2512 (H)2512 2725, 2728 (H)2728 4527 Quantity 5,000 4,000 2,000 1,000 500 Resistance Value Four characters with the multiplier used as the decimal holder. "L" used as multiplier of 10-3 for any value under 0.1 ohm. 0.00025 ohm = L250 0.004 ohm = 4L00 0.05 ohm = 50L0 0.12 ohm = R120 www.seielect.com marketing@seielect.com CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions High Power Chip Resistors and Thermal Management Stackpole has developed several surface mount resistor series in addition to our current sense resistors, which have had higher power ratings than standard resistor chips. This has caused some uncertainty and even confusion by users as to how to reliably use these resistors at the higher power ratings in their designs. The data sheets for the RHC, RMCP, RNCP, CSR, CSRN, CSRF, CSS, and CSSH state that the rated power assumes an ambient temperature of no more than 100 degrees C for the CSS / CSSH series and 70 degrees C for all other high power resistor series. In addition, IPC and UL best practices dictate that the combined temperature on any resistor due to power dissipated and ambient air shall be no more than 105C. At first glance this wouldn't seem too difficult, however the graph below shows typical heat rise for the CSR 1/2 100 milliohm at full rated power. The heat rise for the RMCP and RNCP would be similar. The RHC with its unique materials, design, and processes would have less heat rise and therefore would be easier to implement for any given customer. The 102 degrees C heat rise shown here would indicate there will be additional thermal reduction techniques needed to keep this part under 105C total hot spot temperature if this part is to be used at 0.75 watts of power. However, this same part at the usual power rating for this size would have a heat rise of around 72 degrees C. This additional heat rise may be dealt with using wider conductor traces, larger solder pads and land patterns under the solder mask, heavier copper in the conductors, vias through PCB, air movement, and heat sinks, among many other techniques. Because of the variety of methods customers can use to lower the effective heat rise of the circuit, resistor manufacturers simply specify power ratings with the limitations on ambient air temperature and total hot spot temperatures and leave the details of how to best accomplish this to the design engineers. Design guidelines for products in various market segments can vary widely so it would be unnecessarily constraining for a resistor manufacturer to recommend the use of any of these methods over another. Note: The final resistance value can be affected by the board layout and assembly process, especially the size of the mounting pads and the amount of solder used. This is especially notable for resistance values 50 m. This should be taken into account when designing. Rev Date: 10/01/2015 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 5 www.seielect.com marketing@seielect.com