pulse withstanding chip resistors pwc series excellent pulse withstand performance improved working voltage improved power rating standard chip sizes (0805 to 2512) electrical data size 0805 1206 2010 2512 power @70 c 0.125w 0.33w 0.75w 1.5w res istance range 1r0 to 10m tolerance 0.5*, 1, 5% lev 150v 200v 400v 500v tcr <10r:200ppm/ c > 10r:100ppm/ c operating temperature - 55 to +155 c values e96 preferred other values to special order pulse capability see graphs ? full application note avail able on request *0.5% tolerance only available on values 10r to 1m0 physical data dimensions of pwc resistors are given below in mm and weight in g l w t max a b* c wt. 0805 2.0 0.3 1.25 0.2 0.6 0.3 0.15 0.9 min 0.3 0.1 0.009 1206 3.2 0.4 1.6 0.2 0.7 0.4 0.2 1.7 min 0.4 0.15 0.020 2010 5.1 0.3 2.5 0.2 0.8 0.6 0.3 3.0 min n/a 0.036 2512 6.5 0.3 3.2 0.2 0.8 0.6 0.3 4.4 min n/a 0.055 general note irc, reserves the right to make changes in product specification without notice or liability. all information is subject to irc?s own test data and is considered accurate at time of print. irc irc ? ? advanced film division advanced film division 4222 south staples street, corpus christi, texas, 78411,usa. tel: 361 - 992 - 7900 fax: 361 - 992 - 3377 web: www.irctt.com construction thick film resistor material, overglaz e and organic protections are screen printed on a 96% alumina substrate. wrap - around terminations have an electroplated nickel barrier and tin - lead solder coating; this ensures excellent ?leach? resistance properties and solderability. chips can withstand immersion in solder at 260 c for 30 seconds. marking no marking provided. solvent resistance the body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. issue a 15 - 8 - 2001 sm b
performance data maximum typical load at rated power: 1000 hours at 70 c d r% 1 0.25 shelf life test: 12 months at room temperature d r% 0.1 0.02 derating from rated power at 70 c zero at 1 55 c overload: 6.25 x rated power for 5 seconds d r% 1 0.1 dry heat: 1000 hours at 155 c d r% 1 0.2 long term damp heat d r% 1 0.25 temperature rapid change d r% 0.25 0.05 resistance to solder heat d r% 0.25 0.05 voltage proof volts 500 note: an 0.01 ohm addition to be added to the performance of all resistors <10 ohms. pulse performance data general note irc, reserves the right to make changes in product specification withou t notice or liability. all information is subject to irc?s own test data and is considered accurate at time of print. irc irc ? ? advanced film division advanced film division 4222 south staples street, corpus christi, texas, 78411,usa. tel: 361 - 992 - 7900 fax: 361 - 992 - 3377 web: www. irctt.com 1.2/50 m m s lightning surge 10 100 1000 10000 1 10 100 1000 10000 100000 1000000 10000000 value (ohms) peak voltage (volts) o805 1206 2010 2512 10/700 m m s lightning surge 10 100 1000 10000 1 10 100 1000 10000 100000 1000000 10000000 value (ohms) peak voltage (volts) o805 1206 2010 2512 lightning surge resistors are tested in accordance with iec 60 115 - 1 using both 1.2/50us and 10/700us pulse shapes. the limit of acceptance is a shift in resistance of less than 1% from the initial value. issue a 15 - 8 - 2001 sm
pulse performance data general note irc, reserves the right to make changes in product specification without notice or liability. all information is subject to irc?s own test data and is considered accurate at tim e of print. irc irc ? ? advanced film division advanced film division 4222 south staples street, corpus christi, texas, 78411,usa. tel: 361 - 992 - 7900 fax: 361 - 992 - 3377 web: www.irctt.com single pulse 1 10 100 1000 0.0001 0.001 0.01 0.1 1 pulse duration ti (s) pulse power p (w) o805 1206 2010 2512 continuous pulses 0.1 1 10 100 0.0001 0.001 0.01 0.1 1 pulse duration ti (s) pulse power p (w) o805 1206 2010 2512 pulse voltage 10 100 1000 10000 0.0001 0.001 0.01 0.1 1 pulse duration ti (s) pulse voltage (volts) o805 1206 2010 2512 single impulse. the single impulse graph is the result of 50 impulses of rectangular shape applied at one minute intervals. the limit of accep tance 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 as shown. continuous load due to repetitive pulses. the continuous load graph was ob tained 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. issue a 15 - 8 - 2001 sm
packaging resistors are supplied tape and reel as per iec 286 - 3. type 1206 2010 2512 reel 3 ,000 3,000 1,800 mounting pwc resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional tolerances. electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow soldering of wrap - around terminations. wrap - around terminations provide good leach properties and ensure reliable contact. due to the robust construction the pwc can be immersed in the solder bath for 30 seconds at 260c. this enables the resistor to be mounted on one side of a printed circuit board and wire - leaded components applied on the other side. operating temperature range pwc resistors themselves can operate at a maximum temperature of 155c (see performance above). for soldered resistor s, the joint temperature should not exceed 110c. this condition is met when the stated power levels at 70c are used. ordering procedure specify type reference etc as shown in this example of pwc2512 10k ohms 1%. pwc 2512 - 10k f type size value (use iec62 code) tolerance (use iec 62 code) d 0.5% f 1% j 5% general note irc, reserves the right to make changes in product specification without notice or liability. all information is subject to irc?s own test da ta and is considered accurate at time of print. irc irc ? ? advanced film division advanced film division 4222 south staples street, corpus christi, texas, 78411,usa. tel: 361 - 992 - 7900 fax: 361 - 992 - 3377 web: www.irctt.com issue a 15 - 8 - 2001 sm
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