CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Features: • High power metal alloy current sense resistor • High temperature performance up to 225C; for operation up to 275ºC, contact factory • Low thermal EMF (<1µV/C) • Proprietary processing technique produces extremely low resistance values • Qualified to AEC-Q200 • RoHS compliant, lead-free and halogen-free Electrical Specifications - CSS Maximum Power Maximum Rating Maximum Overload Ohmic Range (Ω) and Tolerance Type / Code TCR (ppm/°C) Rating (Watts) Current (A) Current (A) 0.5% 1%, 2%, 5% 9.08 18.16 ±75ppm/ºC - 0.004 CSS0603 0.33 8.1 16.2 ±50 ppm/ºC - 0.005, 0.01, 0.015 12.9 25.8 ±75ppm/ºC - 0.003 CSS0805 0.5 12.9 25.8 ±50 ppm/ºC - 0.005, 0.01, 0.015 ±50 ppm/ºC - 0.001 - 0.004 CSS1206 1 31.62 63.25 ±25 ppm/ºC 0.007 - 0.015 0.005 - 0.015 ±15 ppm/ºC 0.016 - 0.05 0.016 - 0.05 ±50 ppm/ºC - 0.001 - 0.003 CSS2010 1 31.62 63.25 ±25 ppm/ºC - 0.004 - 0.006 ±15 ppm/ºC 0.007 - 0.1 0.007 - 0.1 ±50 ppm/ºC - 0.0005 - 0.003 CSS2512 2 63.25 141.42 ±25 ppm/ºC - 0.004 - 0.006 ±15 ppm/ºC 0.007 - 0.075 0.007 - 0.075 ±100 ppm/ºC - 0.0002 CSS2725 4 126.49 316.23 ±50 ppm/ºC - 0.00025 - 0.003 ±25 ppm/ºC 0.004 -0.007 0.004 - 0.007 CSS2728 3 27.39 61.24 ±15 ppm/ºC 0.008 - 0.19 0.008 - 0.1 CSS4527 5 100 173 ±50 ppm/ºC 0.007 - 0.12 0.0005 - 0.12 Electrical Specifications – CSSH (High Power) Maximum Power Maximum Rating Maximum Overload Ohmic Range (Ω) and Tolerance Type / Code TCR (ppm°C) Rating (Watts) Current (A) Current (A) 0.5% 1%, 2%, 5% ±50 ppm/ºC - 0.0005 - 0.0025 CSSH2512 3 77.46 134.16 ±25 ppm/ºC 0.007 - 0.01 0.003 - 0.01 ±50 ppm/ºC 0.0101 - 0.05 0.0101 - 0.08 ±25 ppm/ºC 0.004 - 0.007 0.004 - 0.007 CSSH2728 4 31.62 70.71 ±15 ppm/ºC 0.008 - 0.019 0.008 - 0.05 Please refer to the High Power Resistor Application Note (page 5) for more information on designing and implementing high power resistor types. Rev Date: 01/28/2019 1 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.

CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Mechanical Specifications Maximum Power Resistance Range T1 Type / Code L W H Unit Rating (Watts) (Ω) Bottom Termination 0.004, 0.005 0 . 0 6 3 ± 0 . 0 0 8 0.031 ± 0.008 0.010 ± 0.004 0.012 ± 0.006 inches CSS0603 0.33 0.01, 0.015 1.60 ± 0.20 0.80 ± 0.20 0.25 ± 0.10 0.30 ± 0.15 mm Maximum Power Resistance Range T1 T 2 Type / Code L W H Unit Rating (Watts) (Ω) Bottom Termination Top Termination 0.003, 0.005 0 . 0 8 0 ± 0 . 0 0 8 0.050 ± 0.008 0.012 ± 0.004 0.014 ± 0.008 0.008 ± 0.006 inches CSS0805 0.5 0.01, 0.015 2.03 ± 0.20 1.27 ± 0.20 0.30 ± 0.10 0.35 ± 0.20 0.20 ± 0.15 mm Maximum Power Resistance Range T1 T 2 Type / Code L W H Unit Rating (Watts) (Ω) Bottom Termination Top Termination 0.126 ± 0.010 0.063 ± 0.010 0.025 ± 0.010 0.020 ± 0.010 0.020 ± 0.010 inches CSS1206 0.001 3.20 ± 0.25 1.60 ± 0.25 0.65 ± 0.25 0.51 ± 0.25 0.51 ± 0.25 mm 0.126 ± 0.010 0.063 ± 0.010 0.022 ± 0.010 0.020 ± 0.010 0.020 ± 0.010 inches CSS1206 0.002 - 0.004 3.20 ± 0.25 1.60 ± 0.25 0.55 ± 0.25 0.51 ± 0.25 0.51 ± 0.25 mm 1 CSS1206 0.005 0.126 ± 0.010 0.063 ± 0.010 0.022 ± 0.010 0.024 ± 0.010 0.024 ± 0.010 inches 3.20 ± 0.25 1.60 ± 0.25 0.55 ± 0.25 0.60 ± 0.25 0.60 ± 0.25 mm 0.126 ± 0.010 0.063 ± 0.010 0.022 ± 0.010 0.020 ± 0.010 0.020 ± 0.010 inches CSS1206 0.006 - 0.05 3.20 ± 0.25 1.60 ± 0.25 0.55 ± 0.25 0.51 ± 0.25 0.51 ± 0.25 mm 0.001 - 0.003 0.200 ± 0.010 0.100 ± 0.010 0.031 ± 0.010 0.051 ± 0.010 0.051 ± 0.010 inches 5.08 ± 0.25 2.54 ± 0.25 0.79 ± 0.25 1.30 ± 0.25 1.30 ± 0.25 mm CSS2010 1 0.200 ± 0.010 0.100 ± 0.010 0.025 ± 0.010 0.031 ± 0.010 0.031 ± 0.010 inches 0.0031 - 0.1 5.08 ± 0.25 2.54 ± 0.25 0.65 ± 0.25 0.79 ± 0.25 0.79 ± 0.25 mm 0.0005 - 0.004 0.246 ± 0.010 0.126 ± 0.010 0.031 ± 0.010 0.074 ± 0.010 0.074 ± 0.010 inches 6.25 ± 0.25 3.20 ± 0.25 0.79 ± 0.25 1.88 ± 0.25 1.88 ± 0.25 mm CSS2512 2 0.246 ± 0.010 0.126 ± 0.010 0.025 ± 0.010 0.044 ± 0.010 0.044 ± 0.010 inches 0.0041 - 0.075 6.25 ± 0.25 3.20 ± 0.25 0.65 ± 0.25 1.12 ± 0.25 1.12 ± 0.25 mm 0.246 ± 0.010 0.126 ± 0.010 0.031 ± 0.010 0.074 ± 0.010 0.074 ± 0.010 inches 0.0005 6.25 ± 0.25 3.20 ± 0.25 0.79 ± 0.25 1.88 ± 0.25 1.88 ± 0.25 mm 0.246 ± 0.010 0.126 ± 0.010 0.031 ± 0.010 0.044 ± 0.010 0.044 ± 0.010 inches 0.0006 - 0.0029 6.25 ± 0.25 3.20 ± 0.25 0.79 ± 0.25 1.12 ± 0.25 1.12 ± 0.25 mm 0.246 ± 0.010 0.126 ± 0.010 0.031 ± 0.010 0.074 ± 0.010 0.074 ± 0.010 inches CSSH2512 3 0.003 6.25 ± 0.25 3.20 ± 0.25 0.79 ± 0.25 1.88 ± 0.25 1.88 ± 0.25 mm 0.246 ± 0.010 0.126 ± 0.010 0.031 ± 0.010 0.066 ± 0.010 0.066 ± 0.010 inches 0.0031 - 0.004 6.25 ± 0.25 3.20 ± 0.25 0.79 ± 0.25 1.68 ± 0.25 1.68 ± 0.25 mm 0.246 ± 0.010 0.126 ± 0.010 0.026 ± 0.010 0.044 ± 0.010 0.044 ± 0.010 inches 0.0041 - 0.01 6.25 ± 0.25 3.20 ± 0.25 0.65 ± 0.25 1.12 ± 0.25 1.12 ± 0.25 mm Rev Date: 01/28/2019 2 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.

CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Mechanical Specifications (cont.) Maximum Power Resistance Range T1 T 2 Type / Code Rating (Watts) (Ω) L W H Bottom Termination Top Termination Unit 0.00025, 0.0005 0.268 ± 0.010 0.254 ± 0.010 0.039 ± 0.010 0.085 ± 0.010 0.085 ± 0.010 inches 6.81 ± 0.25 6.45 ± 0.25 0.99 ± 0.25 2.16 ± 0.25 2.16 ± 0.25 mm 0.268 ± 0.010 0.254 ± 0.010 0.043 ± 0.010 0.085 ± 0.010 0.085 ± 0.010 inches 0.001 6.81 ± 0.25 6.45 ± 0.25 1.09 ± 0.25 2.16 ± 0.25 2.16 ± 0.25 mm 0.268 ± 0.010 0.254 ± 0.010 0.039 ± 0.010 0.085 ± 0.010 0.085 ± 0.010 inches 0.0015 6.81 ± 0.25 6.45 ± 0.25 0.99 ± 0.25 2.16 ± 0.25 2.16 ± 0.25 mm CSS2725 4 0.268 ± 0.010 0.254 ± 0.010 0.035 ± 0.010 0.071 ± 0.010 0.071 ± 0.010 inches 0.002 6.81 ± 0.25 6.45 ± 0.25 0.89 ± 0.25 1.80 ± 0.25 1.80 ± 0.25 mm 0.0025 0.268 ± 0.010 0.254 ± 0.010 0.035 ± 0.010 0.065 ± 0.010 0.065 ± 0.010 inches 6.81 ± 0.25 6.45 ± 0.25 0.89 ± 0.25 1.65 ± 0.25 1.65 ± 0.25 mm 0.268 ± 0.010 0.254 ± 0.010 0.035 ± 0.010 0.051 ± 0.010 0.051 ± 0.010 inches 0.003 6.81 ± 0.25 6.45 ± 0.25 0.89 ± 0.25 1.30 ± 0.25 1.30 ± 0.25 mm 0.264 ± 0.010 0.283 ± 0.010 0.039 ± 0.010 0.045 ± 0.010 0.045 ± 0.010 inches CSS2728 3 0.004 - 0.1 6.71 ± 0.25 7.19 ± 0.25 0.99 ± 0.25 1.14 ± 0.25 1.14 ± 0.25 mm 0.264 ± 0.010 0.283 ± 0.010 0.039 ± 0.010 0.045 ± 0.010 0.045 ± 0.010 inches CSSH2728 4 0.004 - 0.1 6.71 ± 0.25 7.19 ± 0.25 0.99 ± 0.25 1.14 ± 0.25 1.14 ± 0.25 mm Maximum Power Resistance Range T1 T 2 Type / Code L W H Unit Rating (Watts) (Ω) Bottom Termination Top Termination 0.450 ± 0.010 0.270 ± 0.010 0.059 ± 0.010 0.127 ± 0.010 0.038 ± 0.010 inches 0.0005 - 0.005 CSS4527 5 11.43 ± 0.25 6.85 ± 0.25 1.50 ± 0.25 3.22 ± 0.25 0.97 ± 0.25 mm 0.450 ± 0.010 0.270 ± 0.010 0.059 ± 0.010 0.071 ± 0.010 0.038 ± 0.010 inches 0.0051 - 0.1 11.43 ± 0.25 6.85 ± 0.25 1.50 ± 0.25 1.82 ± 0.25 0.97 ± 0.25 mm Recommended Pad Layouts Type / Code Maximum Power Rating (Watts) Resistance Range (Ω) a b i Unit 0.039 0.050 0.020 inches CSS0603 0.33 0.005, 0.01, 0.015 1.00 1.27 0.50 mm 0.071 0.086 0.026 inches CSS0805 0.5 0.005, 0.01, 0.015 1.80 2.18 0.66 mm 0.063 0.086 0.039 inches CSS1206 1 0.001 - 0.05 1.60 2.18 1.00 mm Rev Date: 01/28/2019 3 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.

CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Recommended Pad Layouts Type / Code Maximum Power Rating (Watts) Resistance Range (Ω) a b i Unit 0.114 0.115 0.048 inches 0.001 - 0.003 2.89 2.92 1.22 mm CSS2010 1 0.090 0.115 0.095 inches 0.0031 - 0.1 2.29 2.92 2.41 mm 0.120 0.145 0.050 inches 0.0005 - 0.004 3.05 3.68 1.27 mm CSS2512 2 0.083 0.145 0.125 inches 0.0041 - 0.075 2.11 3.68 3.18 mm 0.120 0.145 0.050 inches 0.0005 3.05 3.68 1.27 mm 0.0006 - 0.0029 0.086 0.145 0.118 inches CSSH2512 3 0.0041 - 0.01 2.19 3.68 3.00 mm 0.110 0.145 0.071 inches 0.003 - 0.004 2.79 3.68 1.80 mm 0.125 0.270 0.052 inches CSS2725 4 0.00025 - 0.003 3.18 6.86 1.32 mm 0.108 0.308 0.138 inches CSS2728 3 0.004 - 0.1 2.75 7.82 3.51 mm 0.108 0.308 0.138 inches CSSH2728 4 0.004 - 0.1 2.75 7.82 3.51 mm 0.189 0.344 0.217 inches 0.0005 - 0.005 4.80 8.74 5.51 mm CSS4527 5 0.134 0.344 0.327 inches 0.0051 - 0.12 3.40 8.74 8.31 mm Power Derating Curve: -55ºC 70°C 100°C 100 80 %) d ( 60 oa L er 40 CSS0603, CSS0805 w o All other sizes P 20 0 150°C 225ºC -60 0 50 100 150 200 250 Ambient Temperature (ºC) Rev Date: 01/28/2019 4 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.

CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions Performance Characteristics Test Test Method Test Specification Test Condition TCR (ppm/º C) = (R2-R1) X 106 Per specification R1 (T2-T1) Temperature Coefficient of Resistance R1: resistance of room temperature (T1) JIS-C-5201-1 4.8 (refer to Electrical (TCR) R2: resistance of 150ºC (T2) Specification table) T1: room temperature T2: temperature at 150°C 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 Short Time Overload (∆R/R1) ≤ ±0.5% JIS-C-5201-1 4.13 CSS2512-2W: 5 times rated power (rating power duration = 5 seconds) CSSH2512-3W: 3 times rated power CSS2725-4W: 4 times rated power CSS2728-3W: 3 times rated power CSSH2728-4W: 4 times rated power (∆R/R1) ≤ ±2% CSS4527-5W: 3 times rated power Insulation Resistance JIS-C-5201-1 4.6 ≥109Ω 100±15V DC for 1 minute 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: -55C to +150°C. Contact factory for operation at higher temperatures. Operating Temperature Range for all other sizes: -55C to +225°C. Contact factory for operation at higher temperatures. 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°C for the CSS / CSSH series and 70°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 105°C. 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. Rev Date: 01/28/2019 5 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.

CSS/CSSH Series Stackpole Electronics, Inc. Ultra Precision Current Sensing Chip Resistor Resistive Product Solutions The 102°C heat rise shown here would indicate there will be additional thermal reduction techniques needed to keep this part under 105°C 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°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, via 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 ≤ 50mΩ. This should be taken into account when designing. RoHS Compliance Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to meet the various regulatory requirements now prevalent, such as the European Union’s directive regarding “Restrictions on Hazardous Substances” (RoHS 3). As part of this ongoing program, we periodically update this document with the status regarding the availability of our compliant components. All our standard part numbers are compliant to EU Directive 2011/65/EU of the European Parliament as amended by Directive (EU) 2015/863/EU as regards the list of restricted substances. RoHS Compliance Status Stan dard Lead-Free Standard Package / Lead-Free Product Description Termination Series Lead-Free Termination Mfg. Effective Date E f f e c t i v e D a te RoHS Composition Code Series Type Compliant (Std Product Series) (YY/WW) Ultra Precision Current Sensing CSS SMD YES 100% Matte Sn over Ni Always Always Chip Resistor CSSH Ultra Precision Current Sensing S M D YES 100% Matte Sn over Ni Always Always Chip Resistor (High Power) “Conflict Metals” Commitment We at Stackpole Electronics, Inc. are joined with our industry in opposing the use of metals mined in the “conflict region” of the eastern Democratic Republic of the Congo (DRC) in our products. Recognizing that the supply chain for metals used in the electronics industry is very complex, we work closely with our own suppliers to verify to the extent possible that the materials and products we supply do not contain metals sourced from this conflict region. As such, we are in compliance with the requirements of Dodd-Frank Act regarding Conflict Minerals. Compliance to “REACH” We certify that all passive components supplied by Stackpole Electronics, Inc. are SVHC (Substances of Very High Concern) free and compliant with the requirements of EU Directive 1907/2006/EC, “The Registration, Evaluation, Authorization and Restriction of Chemicals”, otherwise referred to as REACH. Contact us for complete list of REACH Substance Candidate List. Environmental Policy It is the policy of Stackpole Electronics, Inc. (SEI) to protect the environment in all localities in which we operate. We continually strive to improve our effect on the environment. We observe all applicable laws and regulations regarding the protection of our environment and all requests related to the environment to which we have agreed. We are committed to the prevention of all forms of pollution. Rev Date: 01/28/2019 6 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.

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 Size Tolerance Packaging Resistance Value Code Description Size Power Code Tol Code Description Size Quantity Four characters with CSS Metal Alloy 0603 0.33W D 0.5% 0603, 0805 5,000 the multiplier used as CSSH High Power 0805 0.5W F 1% 1206 4,000 the decimal holder. 1206 1W G 2% 2010, 2512 "L" used as multiplier 2,000 2010 1W J 5% T 7" Reel - Plastic Tape (H)2512 of 10-3 for any value 2512 2W 2725, 2728 under 0.1 ohm. 1,000 (H)2512 3W (H)2728 0.00025 ohm = L250 2725 4W 4527 500 0.004 ohm = 4L00 2728 3W 0.05 ohm = 50L0 (H)2728 4W 0.12 ohm = R120 4527 5W Rev Date: 01/28/2019 7 www.seielect.com This specification may be changed at any time without prior notice marketing@seielect.com Please confirm technical specifications before you order and/or use.