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 225°C; for operation up to 275ºC, contact factory Excellent frequency response Low thermal EMF (<1µV/C) Proprietary processing technique produces extremely low resistance values RoHS compliant / lead-free Electrical Specifications Type/Code CSS1206 Maximum Power Rating (Watts) 1 Maximum Rating Current (A) 31.62 Ohmic Range (Ω) and Tolerance Maximum Overload Current (A) TCR (ppm/ºC) 0.5% 1%, 2%, 5% 63.25 ±50 ppm/ºC ±25 ppm/ºC ±15 ppm/ºC 0.007 - 0.015 0.016 - 0.05 0.001 - 0.004 0.005 - 0.015 0.016 - 0.05 0.007 - 0.1 0.001 - 0.003 0.004 - 0.006 0.007 - 0.1 CSS2010 1 31.62 63.25 ±50 ppm/ºC ±25 ppm/ºC ±15 ppm/ºC CSS2512 2 63.25 141.42 ±50 ppm/ºC ±25 ppm/ºC ±15 ppm/ºC 0.007 - 0.075 0.0005 - 0.003 0.004 - 0.006 0.007 - 0.075 CSSH2512 3 77.46 134.16 ±50 ppm/ºC ±25 ppm/ºC 0.007 - 0.01 0.0005 - 0.0025 0.003 - 0.01 CSS2725 4 126.49 252.95 ±50 ppm/ºC 0.004 - 0.007 0.008 - 0.1 0.004 - 0.007 0.008 - 0.1 0.004 - 0.007 0.008 - 0.05 0.00025 - 0.003 CSS2728 3 27.39 47.43 ±25 ppm/ºC ±15 ppm/ºC CSSH2728 4 31.62 63.25 ±25 ppm/ºC ±15 ppm/ºC 0.004 - 0.007 0.008 - 0.05 CSS4527 5 100 173 ±50 ppm/ºC 0.007 - 0.12 0.0005 - 0.12 Please refer to the High Power Resistor Application Note (page 6) for more information on designing and implementing high power resistor types. Rev Date: 06/04/2012 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 [email protected] 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 (Ω) 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 0.00025, 0.0005 0.001 0.0015 CSS2725 4 0.002 0.0025 0.003 CSS2728 3 0.004 - 0.1 CSSH2728 4 0.004 - 0.1 CSS4527 5 0.0005 - 0.005 0.0051 - 0.1 L 0.126 3.20 0.200 5.08 0.200 5.08 0.246 6.25 0.246 6.25 0.246 6.25 0.246 6.25 0.246 6.25 0.268 6.81 0.268 6.81 0.268 6.81 0.268 6.81 0.268 6.81 0.268 6.81 0.264 6.71 0.264 6.71 0.450 11.43 0.450 11.43 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± Rev Date: 06/04/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. W 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 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 0.010 0.25 0.010 0.25 0.063 1.60 0.100 2.54 0.100 2.54 0.130 3.30 0.130 3.30 0.130 3.30 0.130 3.30 0.130 3.30 0.254 6.45 0.254 6.45 0.254 6.45 0.254 6.45 0.254 6.45 0.254 6.45 0.283 7.19 0.283 7.19 0.270 6.85 0.270 6.85 2 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± a H 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 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 0.010 0.25 0.010 0.25 0.025 0.65 0.031 0.79 0.025 0.65 0.031 0.79 0.025 0.65 0.031 0.79 0.031 0.79 0.031 0.79 0.039 0.99 0.043 1.09 0.039 0.99 0.035 0.89 0.035 0.89 0.035 0.89 0.039 0.99 0.039 0.99 0.059 1.50 0.059 1.50 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± 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 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 0.010 0.25 0.010 0.25 0.020 0.51 0.051 1.30 0.031 0.79 0.074 1.88 0.044 1.12 0.074 1.88 0.044 1.12 0.066 1.68 0.085 2.16 0.085 2.16 0.085 2.16 0.071 1.80 0.065 1.65 0.051 1.30 0.045 1.14 0.045 1.14 0.038 0.97 0.038 0.97 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± b 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 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 0.010 0.25 0.010 0.25 0.020 0.51 0.051 1.30 0.031 0.79 0.074 1.88 0.044 1.12 0.074 1.88 0.044 1.12 0.066 1.68 0.085 2.16 0.085 2.16 0.085 2.16 0.071 1.80 0.065 1.65 0.051 1.30 0.045 1.14 0.045 1.14 0.127 3.22 0.071 1.82 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± Unit 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 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 0.010 0.25 0.010 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 www.seielect.com [email protected] CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Solder Pad Dimensions Type/Code Maximum Power Rating Resistance Range (Ω) (Watts) CSS1206 1 CSS2010 1 0.001 - 0.05 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: 06/04/2012 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 0.063 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 0.086 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 0.039 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 www.seielect.com [email protected] CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Percent Rated Power (%) Power Derating Curve: 100 75 50 25 50 0 100 150 200 225ºC 250 300 Ambient Temperature (ºC) Performance Characteristics Test Item Temperature Coefficient of Resistance (TCR) Short Time Overload (rating power duration = 5 seconds) Insulation Resistance Dielectric Withstanding Voltage Condition of Test TCR (ppm/ºC) = (R2-R1) R1 (T2-T1) X 10 Test Method Test Limits JIS C 5201-1 4.8 Per specification (refer to Electrical Specification table) 6 R1: resistance of room temperature (T1) R2: resistance of 150ºC (T2) The number of rated power are as follows: 1. CSS1206-1W: 4 times rated power 2. CSS2010-1W: 4 times rated power 3. CSS2512-2W: 5 times rated power 4. CSSH2512-3W: 3 times rated power 5. CSS2725-4W: 4 times rated power 6. CSS2728-3W: 3 times rated power 7. CSSH2728-4W: 4 times rated power 8. CSS4527-5W: 3 times rated power 100±15V DC for 1 minute Applied 500V AC for 1 minute and limit surge current 50mA (max) JIS C 5201-1 4.13 (∆R/R1) ≤ ±0.5% (∆R/R1) ≤ ±2% 9 JIS C 5201-1 4.6 ≥10 Ω JIS C 5201-1 4.7 Without break down Operating Temperature Range: -55°C to +225°C. Contact factory for operation at higher temperatures. Rev Date: 06/04/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 4 www.seielect.com [email protected] CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions 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 Metal Alloy CSS High Power CSSH Size 1206 2010 2512 (H)2512 2725 2728 (H)2728 4527 Power 1W 1W 2W 3W 4W 3W 4W 5W Tolerance Code Tol D 0.5% F 1% G 2% J 5% Packaging Code Description T 7" Reel - Plastic Tape Resistance Value Size 1206 2010, 2512 (H)2512 2725, 2728 (H)2728 4527 Quantity 4,000 2,000 1,000 Four characters with "L" used as multiplier -3 of 10 for any value under 0.1 ohm. 0.00025 ohm = L250 0.0009 ohm = L900 0.003 ohm = 3L00 500 Legacy Part Number (before January 3, 2011): Type CSS CSSH SEI Type Code Nominal Resistance Tolerance Packaging CSS 2725 0.003 1% R Description Metal Alloy High Power Code 1206 2010 2512 (H) 2512 2725 2728 (H) 2728 4527 Wattage 1W 1W 2W 3W 4W 3W 4W 5W Size 1206 2010 2512 2512 2725 2728 2728 4527 Rev Date: 06/04/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Tolerance 0.5% 1% 2% 5% 5 SEI Types CSS1206 CSS2010 CSS2512 CSSH2512 CSS2725 CSS2728 CSSH2728 CSS4527 Quantity Standard Code 4,000 Description 2,000 R 7" reel plastic tape 1,000 500 www.seielect.com [email protected] 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 ½ 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 mΩ. This should be taken into account when designing. Rev Date: 06/04/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 6 www.seielect.com [email protected]