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| Pulse Withstanding Chip Resistors PWC Series * * * * * Higher power ratings Improved working voltage ratings Excellent pulse withstanding performance Sn/Pb or Pb-free wrap-around terminations Standard chip sizes available from 0805 to 2512 Electrical Data Characteristic Resistance Range 1%, 5% 0.5% Power @ 70C Max Voltage Rating Absolute TCR Operating Temperature Thermal Impedance Pad/Trace Area Termination 220C/W 40mm2* 160C/W 125mm2* 125mW 150V 500mW 200V 1.0W to 10MW 10W to 1MW 1.0W 400V 2.0W 500V 0805 1206 2010 2512 <6W = 0 - 350ppm; 6W = 100ppm/C -55C to +155C 80C/W 250mm2* 40C/W 500mm2* Wrap-around Sn/Pb or Pb-free with leach resistant Ni barrier *Recommended minimum pad and adjacent trace area for each termination for rated power on FR4 PCB. Environmental Data Test Load life at rated power (1000 hours @ 70C) Overload (5.0 X rated power for 2512, 6.25 X rated power for other sizes, 5 secs) High temperature storage (1000 hours @ 155C) Moisture resistance Thermal shock Resistance to soldering heat Note : 0.01W added for all resistance values <10W. 1 Maximum1 R 1.00% 1.00% 1.00% 1.00% 0.25% 0.25% Typical R 0.25% 0.10% 0.20% 0.25% 0.05% 0.05% General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC's own data and is considered accurate at time of going to print. Advanced Film Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com A subsidiary of TTelectronics plc PWC Series Issue January 2009 Pulse Withstanding Chip Resistors Pulse Performance Data Lighting Surge Resistors are tested in accordance with IEC 60 115-1 using both 1.2/50ms and 10/700ms pulse shapes. The limit of acceptance is a shift in resistance of less than 1% from the initial value. 1.2/50 S Lightning Surge 10000 2512 2010 1206 0805 Peak voltage (volts) 1000 100 10 1 10 100 1000 10000 100000 1000000 10000000 Resistance (ohms) 10/700 S Lightning Surge 10000 2512 2010 Peak Voltage (volts) 1000 1206 0805 100 10 1 10 100 1000 10000 100000 1000000 10000000 Resistance (ohms) Advanced Film Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com PWC Series Issue January 2009 Pulse Withstanding Chip Resistors Pulse Performance Data Single impulse: The single impulse graph is the result of 50 impulses of rectangular shape applied at one minute intervals. The limit of acceptance was a shift in resistance of less than 1% from the initial value. The power applied was subject to the restrictions of the maximum permissible impulse voltage graph shown. Single Pulse 1000 Pulse Power (watts) 100 10 2512 2010 1206 1 0.0001 0.001 0.01 Pulse duration (seconds) 0.1 1 0805 Continuous Pulses 100 Pulse Power (watts) 10 2512 2010 1 Continuous load due to repetitive pulses: The continuous load graph was obtained by applying repetitive rectangular pulses where the pulse period was adjusted so that the average power dissipated in the resistor was equal to its rated power at 70C. Again the limit of acceptance was a shift in resistance of less than 1% from the initial value. 1206 0805 0.1 0.0001 0.001 0.01 Pulse Duration (seconds) 0.1 1 Pulse Voltage 10000 Pulse Voltage (Volts) 1000 2512 2010 1206 0805 100 10 0.0001 0.001 0.01 0.1 1 Pulse Duration (seconds) Advanced Film Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com PWC Series Issue January 2009 Pulse Withstanding Chip Resistors Physical Data L (mm) 0805 1206 2010 2.00.3 3.20.4 5.10.3 W (mm) 1.250.2 1.60.2 2.50.2 T max (mm) 0.6 0.7 0.8 A (mm) 0.30.15 0.40.2 0.60.3 B min (mm) 0.9 1.7 3.0 C (mm) 0.30.1 0.40.15 0.60.25 Weight (grams) L 0.009 C W 0.020 T 0.036 2512 6.50.3 3.20.2 0.8 0.60.3 4.4 0.60.25 0.055 A Construction: Thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. Wrap-around terminations have an electroplated nickel barrier and tin-lead solder or matte-tin finish, ensuring excellent leach resistance properties and solderability. Marking: Components are not marked. Reels are marked with type, value, tolerance, date code and quantity. Solvent resistance: The body protection is resistance to all normal industrial cleaning solvents suitable for printed circuits. Power Derating Data 100 Ordering Data Prefix Chip Type PWC - PWC 2512LF - 100R - F PWC % Of Rated P ower Chip Size and Termination 50 10 0805 = Sn/Pb solder termination 0805LF = 100% Tin (pb-free) termination 1206 = Sn/Pb solder termination 1206LF = 100% Tin (pb-free) termination 2010 = Sn/Pb solder termination 2010LF = 100% Tin (pb-free) termination 2512 = Sn/Pb solder termination 2512LF = 100% Tin (pb-free) termination 25 70 155 Resistance Value (Use IEC62 code) Tolerance Code Temperature in C J = 5%; F = 1%; D = 0.5% For additional information or to discuss your specific requirements, please contact our Applications Team using the contact details below. Advanced Film Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com PWC Series Issue January 2009 |
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