RNCP Series Stackpole Electronics, Inc. High Power Anti-Sulfur Thin Film Chip Resistor Features: * * * Resistive Product Solutions Higher power ratings than standard thick film chips Absolute TCRs to 100ppm/C Impervious to Sulfur contamination, no silver present in terminations Absolute Tolerances to 1% Completely lead free and RoHS compliant without exemptions - does not use lead containing glass Comparable in cost to standard thick film chip resistors * * * Electrical Specifications Ohmic Range () and Tolerance Type / Code Package Type Power Rating(2) (Watts) @ 70C Maximum Working Voltage(1) Maximum Overload Voltage Resistance Temperature Coefficient RNCP0402 0402 0.1W 50V 100V 100 ppm/C 1 - 10K RNCP0603 0603 0.125W 150V 300V 100 ppm/C 1 - 47K 100 ppm/C 100 ppm/C 1 - 100K 1 - 100K RNCP0805 0805 0.25W 200V 400V RNCP1206 1206 0.5W 200V 400V (1) Lesser of PR or maximum working voltage (2) Power rating for each package size is valid if ambient temp 80C and terminal temp 105C 1%, 5% Please refer to the High Power Resistor Application Note (page 3) for more information on designing and implementing high power resistor types. Mechanical Specifications Type / Code L Body Length W Body Width H Body Height a Top Termination b Bottom Termination Unit RNCP0402 0.039 0.004 1.00 0.10 0.020 0.002 0.50 0.05 0.012 0.002 0.30 0.05 0.010 0.006 0.25 0.15 0.012 0.006 0.30 0.15 inches mm RNCP0603 0.059 0.008 1.50 0.20 0.031 0.004 0.80 0.10 0.016 0.004 0.40 0.10 0.012 0.006 0.30 0.15 0.016 0.008 0.40 0.20 inches mm RNCP0805 0.079 0.006 2.00 0.15 0.049 0.006 1.25 0.15 0.020 0.004 0.50 0.10 0.016 0.008 0.40 0.20 0.024 0.008 0.60 0.20 inches mm RNCP1206 0.122 0.008 3.10 0.20 0.059 0.008 1.50 0.20 0.020 0.004 0.50 0.10 0.020 0.008 0.50 0.20 0.028 0.008 0.70 0.20 inches mm Rev Date: 06/18/2012 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 marketing@seielect.com RNCP Series Stackpole Electronics, Inc. High Power Anti-Sulfur Thin Film Chip Resistor Resistive Product Solutions Performance Characteristics Test Test Conditions Short Time Overload Typical 1% 5% RCWV*2.5 or Max Overload Voltage, 5 seconds 1% 2% Thermal Shock MIL-STD-202F Method 107G -55C to +125C, 1000 Cycles 1% 1% Load Life MIL-STD-202F Method 108A RCWV, 125C, 1.5 Hrs ON, 0.5 Hrs OFF, Total 1000 Hrs 2% 3% Humidity (steady state) MIL-STD-202F Method 103B 85C, 85% RH, RCWV 1.5Hrs ON, 0.5Hrs OFF, Total 1000Hrs 3% 3% Resistance to Soldering Heat MIL-STD-202F Method 210E 260 5C, 10 1 second 1% 1% Storage Temperature : 25 3C; Humidity < 80% RH Operating Temperature Range: -55C to +155C Power Derating Curve: 100 -55C 70C Power Load (%) 80 60 40 20 0 -60 155C -40 -20 0 20 120 40 60 80 100 Ambient Temperature (C) 140 160 180 How to Order 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 R N C P 0 6 0 3 F T D 4 K 7 5 Size 0402 0603 0805 1206 Power 0.1W 0.125W 0.25W 0.5W Product Series High Power Anti-Corrosive RNCP Code F J Tolerance Tol Value 1% E94, E24 5% E24 Packaging Code Description T 7" Reel - Paper Tape Size 0402 0603, 0805, 1206 Quantity 10,000 5,000 TCR Code ppm D 100 RNCP SEI Type Code TCR Nominal Resistance Tolerance Packaging RNCP 0603 T1 4.75K 1% R Code Wattage Size 0402 0.1W 0402 0603 0.125W 0603 0805 0.25W 0805 1206 0.5W 1206 Code T1 = 100ppm Description High Power Anti-Corrosive Rev Date: 06/18/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Four characters with the multiplier used as the decimal holder. 1 ohm = 1R00 47 Kohm = 47K0 100 Kohm = 100K Legacy Part Number (before January 3, 2011): Type Resistance Value Tol 1% 5% 2 Value E94, E24 E24 SEI Types Pkg Qty Description Code 0402 10,000 7" reel - paper tape R 0603, 0805, 1206 5,000 www.seielect.com marketing@seielect.com RNCP Series Stackpole Electronics, Inc. High Power Anti-Sulfur Thin Film 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: 06/18/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 3 www.seielect.com marketing@seielect.com