RHC Series Stackpole Electronics, Inc. High Power Thick Film Chip Resistor Resistive Product Solutions Features: • Handles 2W of power • Resistances from 0.1Ω to 1MΩ • RoHS compliant and halogen-free • TCR of ± 100 ppm/ºC • 1% and 5% tolerances • Runs significantly cooler than standard thick film 2512 chip Electrical Specifications Maximum Maximum Package Power Rating (W) Ohmic Range (Ω) and Tolerance Type / Code Working Overload TCR (ppm/ºC) Type @ 70ºC Voltage (V)(1) Voltage (V) 1%, 5% RHC2512 2512 2 200 400 ±100 0.1 - 1M Note: (1) Lesser of √P*R or maximum working voltage Please refer to the High-Power Resistor Application Note (page 5) for more information on designing and implementing high power resistor types. Mechanical Specifications L W H a b Type / Code Unit Body Length Body Width Body Height Top Termination Bottom Termination 0.248 ± 0.008 0.126 ± 0.008 0.024 ± 0.004 0.028 ± 0.008 0.087 ± 0.008 inches RHC2512 6.30 ± 0.20 3.20 ± 0.20 0.60 ± 0.10 0.70 ± 0.20 2.20 ± 0.20 mm Test Typical Moisture Resistance Load Life Resistance to Soldering ±1% + 0.05Ω for <10Ω and ±1% for ≥10Ω Temperature Cycling Thermal Shock Short Time Overload Insulation Resistance ≥1MΩ Operating temperature range is -55°C to +155°C Power Derating Curve: -55ºC 70ºC 100 %) 80 er ( w Po 60 d e at R 40 nt e c er 20 P 155ºC 0 -60 0 20 40 60 80 100 120 140 160 180 Ambient Temperature (ºC) Rev Date: 11/18/2020 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.

RHC Series Stackpole Electronics, Inc. High Power Thick Film Chip Resistor Resistive Product Solutions Recommended Pad Layout L W D Type / Code Unit Total Length Total Width Pad Depth 0.315 0.138 0.118 inches RHC2512 8.00 3.50 3.00 mm Recommended Solder Profile This information is intended as a reference for solder profiles for Stackpole resistive components. These profiles should be compatible with most soldering processes. These are only recommendations. Actual numbers will depend on board density, geometry, packages used, etc., especially those cells labeled with “*”. 100% Matte Tin / RoHS Compliant Terminations Soldering iron recommended temperatures: 330°C to 350°C with minimum duration. Maximum number of reflow cycles: 3. Wave Soldering Description Maximum Recommended Minimum Preheat Time 80 seconds 70 seconds 60 seconds Temperature Diff. 140°C 120°C 100°C Solder Temp. 260°C 250°C 240°C Dwell Time at Max. 10 seconds 5 seconds * Ramp DN (°C/sec) N/A N/A N/A Temperature Diff. = Defference between final preheat stage and soldering stage. Convection IR Reflow Description Maximum Recommended Minimum Ramp Up (°C/sec) 3°C/sec 2°C/sec * Dwell Time > 217°C 150 seconds 90 seconds 60 seconds Solder Temp. 260°C 245°C * Dwell Time at Max. 30 seconds 15 seconds 10 seconds Ramp DN (°C/sec) 6°C/sec 3°C/sec * Rev Date: 11/18/2020 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.

RHC Series Stackpole Electronics, Inc. High Power Thick Film Chip Resistor Resistive Product Solutions Recommended Lead Free Resistor Reflow Profile Heat Rise and Terminal Temperature: Cº 140 1 2 120 100 80 60 40 20 Hot Spot 1 Solder Joint 2 0 0 Load (w) 1 2 Rev Date: 11/18/2020 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.

RHC Series Stackpole Electronics, Inc. High Power Thick Film Chip Resistor Resistive Product Solutions Repeated Overload: Test condition: Voltage (Power): 2.0, 2.25, 2.5, 2.75, 3.0, 3,25 times of rated voltage. (8W, 10.1W, 12.5W, 15.1W, 18W, 21.1W) Applied time: Each voltage 5 seconds. As a reference test, the RMC was tested with the same rated voltage and testing substrate. Packaging Specifications – Embossed Plastic Tape Type A B W F E P1 Unit 0.134± 0.004 0.260± 0.004 0.472± 0.008 0.217± 0.002 0.069± 0.004 0.157± 0.004 Inches RHC2512 3.40± 0.10 6.60± 0.10 12.00± 0.20 5.50± 0.05 1.75± 0.10 4.00± 0.10 mm Type P2 P0 D0 t1 t2 Unit 0.079± 0.002 0.157± 0.004 0.061± 0.002 0.010± 0.002 0.039± 0.004 Inches RHC2512 2.00± 0.05 4.00± 0.10 1.55± 0.05 0.25± 0.05 1.00± 0.10 mm Rev Date: 11/18/2020 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.

RHC Series Stackpole Electronics, Inc. High Power Thick Film Chip Resistor Resistive Product Solutions Reel Specifications Type A B C D E W1 W2 Unit 7.087± 0.118 2.362± 0.039 0.512± 0.008 0.827± 0.031 0.079± 0.020 0.512± 0.012 0.606± 0.039 Inches RHC2512 180.00± 3.00 60.00± 1.00 13.00± 0.20 21.00± 0.80 2.00± 0.50 13.00± 0.30 15.40± 1.00 mm 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 CSR1206 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: 11/18/2020 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.

RHC Series Stackpole Electronics, Inc. High Power Thick Film 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 Standard Lead-Free Standard Package / Series Lead-Free Termination Lead-Free E f f e c t i v e D a t e Product Description Termination Mfg. Effective Date RoHS Composition Code Series Type (Std Product Series) Compliant (YY/WW) High Power Thick Film RHC SMD YES(1) 100% Matte Sn over Ni Jul-04 04/27 Surface Mount Chip Resistor Note (1): RoHS Compliant by means of exemption 7c-I. “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: 11/18/2020 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.

RHC Series Stackpole Electronics, Inc. High Power Thick Film Chip Resistor Resistive Product Solutions How to Order 1 2 3 4 5 6 7 8 9 10 11 12 13 R H C 2 5 1 2 F T 1 0 K 0 Product Series Size Tolerance Packaging Resistance Value Series Description Code W Code Tol Value Code Description Size Quantity Four characters with RHC High Power 2512 2 F 1% E96, E24 7" Reel the multiplier used as T 2512 4000 J 5% E24 Plastic Tape the decimal holder. 0.1 ohm = R100 4.75 ohm = 4R75 10.2 Kohm = 10K2 1 Mohm = 1M00 Rev Date: 11/18/2020 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.