RHC SEI | Alldatasheet

Document overview

  • Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
  • PDF pages: 7

Technical content

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 High Power Thick Film Chip Resistor Stackpole Electronics, Inc. Resistive Product Solutions Features:

  • Handles 2W of power
  • Resistances from 0.1Ω to 1MΩ
  • TCR of ± 100 ppm/ºC
  • 1% and 5% tolerances
  • Runs significantly cooler than standard thick film 2512 chip
  • RoHS compliant and halogen free
  • REACH compliant Please refer to the High-Power Resistor Application Note (page 5) for more information on designing and implementing high power resistor types. Power Derating Curve: Electrical Specifications Mechanical Specifications 1%, 5% RHC2512 2512 2 200 400 ±100 0.1 - 1M Note: (1) Lesser of or maximum working voltage Type/Code Package Type Power Rating (W) @ 70ºC Maximum Working Voltage (V)(1) Maximum Overload Voltage (V) TCR (ppm/ºC) Ohmic Range (Ω) and Tolerance √ P*R Type/Code Unit RHC2512 L W H a b Body Length Body Height Top Termination Bottom TerminationBody Width Test Typical Moisture Resistance Load Life Resistance to Soldering Temperature Cycling Thermal Shock Short Time Overload Insulation Resistance ≥1MΩ ±1% + 0.05Ω for <10Ω and ±1% for ≥10Ω Operating temperature range is -55°C to +155°C

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 High Power Thick Film Chip Resistor Stackpole Electronics, Inc. Resistive Product Solutions 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 dura tion. Maximum number of reflow cycles: 3. Recommended Pad Layout 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 * L W D Total Length Total Width Pad Depth 0.315 0.138 0.118 inches 8.00 3.50 3.00 mmRHC2512 UnitType/Code

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 High Power Thick Film Chip Resistor Stackpole Electronics, Inc. Resistive Product Solutions Heat Rise and Terminal Temperature: Recommended Lead Free Resistor Reflow Profile

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 High Power Thick Film Chip Resistor Stackpole Electronics, Inc. Resistive Product Solutions Repeated Overload: Test condition: Applied time: Each voltage 5 seconds. As a reference test, the RMCF was tested with the same rated voltage and testing substrate.

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 High Power Thick Film Chip Resistor Stackpole Electronics, Inc. Resistive Product Solutions Type Unit P1A B W F E RHC2512 Type Unit P2 P0 D0 t1 t2 RHC2512 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 10 0°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 1206 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. Reel Specifications Type Unit W2A B C D E W1 Packaging Specifications – Embossed Plastic Tape

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 High Power Thick Film Chip Resistor Stackpole Electronics, Inc. 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 s older 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 sp ecify 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 elect ronic 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 o f 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 RHC High Power Thick Film Surface Mount Chip Resistor SMD YES(1) 100% Matte Sn over Ni Jul-04 04/27 Lead-Free Mfg. Effective Date (Std Product Series) Lead-Free Effective Date Code (YY/WW) Note (1): RoHS Compliant by means of exemption 7c-I. Standard Product Series

Description

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. RHC Series High Power Thick Film Chip Resistor Stackpole Electronics, Inc. Resistive Product Solutions 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 “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. How to Order Resistance Value Series Description Code W Code Tol Value Code Description Size Quantity RHC High Power 2512 2 F 1% E96, E24 J 5% E24 0.1 ohm = R100 4.75 ohm = 4R75

10.2 Kohm = 10K2

1 Mohm = 1M00

the decimal holder.4000 Product Series PackagingSize T 7" Reel Plastic Tape 2512