data shee t chip resistors RC1218 5%; 1% product specification ? mar. 09, 2004 v.0 5 supersedes date of feb. 13, 2003
w ww.yageo.com mar. 09, 2004 v.0 chip resistor surface mount 2 7 series rc 1218 RC1218 e-24 series: 3 digits first two digits for significant figure and 3rd digit for number of zeros both e-24 and e-96 series: 4 digits first three digits for significant figure and 4th digit for number of zeros fig. 1 value=100 ? ynsc023 101 RC1218 x x x xx xxxx ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 1 ) tolerance f = 1% j = 5% ( 2 ) packaging type k = embossed taping reel ( 3 ) temperature characteristic of resistance f = 100ppm/c g = 200ppm/c ? = base on spec ( 4 ) special type 11 = 11 inch dia. reel ( 5 ) resistance value: 5r6, 56r, 560r, 5k6, 56k. scope this specification describes rc 1218 series ch ip resistors made by thick film process. ordering information part number is identified by the series, size, tolerance, packing style, temperature coefficient, special type and resistance value. marking b ook, 4 columns protective coat resistor layer inner electrode end termination ceramic substrate mbe940_ a h i 2 fig. 3 chip resistor construction construction the resistors are constructed out of a high-grade ceramic body. internal metal electrodes are added at each end and connected by a resistive paste. the composition of the paste is adjusted to give the approximate required resistance and la ser cutting of this resistive layer that achieves tolerance trims the value. the resistive layer is covered with a protective coat and printed with the resistance value. finally, the two external terminations are added. see fig. 3 fig. 2 value=100 ? ynsc024 1000 for dimension see table 1
w ww.yageo.com mar. 09, 2004 v.0 chip resistor surface mount 3 7 series rc 1218 dimension ynsc025 protective coat w l i 1 fig. 4 chip resistor dimension power rating r r a a t t e e d d p p o o w w e e r r a a t t 7 7 0 0 c c , , r r c c 1 1 2 2 1 1 8 8 1 1 w w r r a a t t e e d d v v o o l l t t a a g g e e : : the dc or ac (rms) continuous working voltage corresponding to the rated power is determined by the following formula: v= (p x r) where v=continuous rated dc or ac (rms) working voltage (v) p=rated power (w) r=resistance value ( x ) mra632 70 100 ? 55 50 t amb ( c) (%p rated ) 0 0 50 100 155 p max fig. 5 maximum dissipation (p max ) in percentage of rated power as a function of the operating ambient temperature (t amb ) characteristics RC1218 1w operating temperature range ?55c to +155c maximum working voltage 200v maximum overload voltage 400v dielectric withstanding voltage 500v 1 ? to 1m ? (e24) 5% 1 ? to 1m ? (e24/e96) 1% resistance range zero ohm jumper<0.02 ? 10 ? < r 1m ? 100ppm/c temperature coefficient 1 ? r 10 ? 200ppm/c rated current 2.0a jumper criteria maximum current 10.0a electrical characteristics for dimension see table 1 type RC1218 l (mm) 3.100.10 w (mm) 4.600.10 h (mm) 0.550.10 i 1 (mm) 0.450.20 i 2 (mm) 0.400.20 table 1 table 2
w ww.yageo.com mar. 09, 2004 v.0 chip resistor surface mount 4 7 series rc 1218 packing method l l e e a a d d e e r r / / t t r r a a i i l l e e r r t t a a p p e e s s p p e e c c i i f f i i c c a a t t i i o o n n c 0.8 21 b a w t msa284_a taping reel dimension RC1218 tape width 12mm ?a (mm) 286+0/?1 ?b (mm) 60+1/?0 ?c (mm) 13.00.2 w (mm) 13.00.3 t (mm) 17.01 fig. 6 reel dimension table 3 for dimension see table 3 ccb325 empty compartments with cover tape (min. 240 mm) cover tape only leader 400 mm trailer (max. 260 mm) trailer end leader end fig. 8 leader and trailer tape dimension packing style reel dimension RC1218 embossed taping reel (k) 11" (286mm) 5,000 table 5 packing style and packaging quantity mbg516_a e f w p 2 p 0 d 0 b ad 1 p 1 direction of unreeling cover tape t dimension RC1218 a (mm) 3.50.2 b (mm) 4.80.2 w (mm) 120.3 e (mm) 1.750.1 f (mm) 5.50.05 p 0 (mm) 4.00.1 p 1 (mm) 8.00.1 p 2 (mm) 2.00.05 ?d 0 (mm) 1.50.1 ?d 1 (mm) 1.50.25 t (mm) 1.00.1 embossed tape specification fig. 7 embossed tape dimension table 4 for dimension see table 4
w ww.yageo.com mar. 09, 2004 v.0 chip resistor surface mount 5 7 series rc 1218 type test method acceptance standard formula temperature coefficient o f resistance (t.c.r.) measure resistance at +25c or specified room temperature as r 1 , then measure at ?55c or +155c respectively as r 2. determine the temperature coefficient of resistance from the following formula: t.c.r. = ------------------------- 1 0 6 (ppm/c) where t 1 =+25c or specified room temperature t 2 =?55c or +155c test temperature r 1 =resistance at reference temperature in ohms r 2 =resistance at test temperature in ohms refer to table 2 thermal shoc k at ?553c for 2 minutes and at +1552c for 2 minutes as one cycle. after 5 cycles, the specimen shall be stabilized at room temp. measure the resistance to determine r/r(%) after one more hour. (0.5%+0.05 ? ) for 1% tol. (1%+0.05 ? ) for 5% tol. low temperature operation place the specimen in a test chamber ma intained at ?65 (+0/?5)c. after one hour stabilization at this temperature, full ra ted working voltage shall be applied for 45 (+5/?0) minutes. have15 (+5/?0 ) minutes af ter remove the voltage, the specimen shall be removed from the chamber and stab ilized at room temperature for 24 hrs. measure the resistance to determine r/r(%). (0.5%+0.05 ? ) for 1% tol . (1.0%+0.05 ? ) for 5% tol. no visible damage short time overload apply 2.5 times of rated voltage but no t exceeding the maximum overload voltage for 5 seconds. have the sp ecimen stabilized at room temperature for 30 minutes minimum. measure the resistance to determine r/r(%). (1.0%+0.05 ? ) for 1% tol. (2.0%+0.05 ? ) for 5% tol. no visible damage insulation resistance place the specimen in the jig and apply a rated continues overload volt age (r.c.o.v) for one minute as shown. measure the insulation resistance. type RC1218 voltage (dc) 400v 10,000m ? dielectric withstand voltage place the specimen in the jig and apply a specified value continuous overload voltage as shown for one minute. type RC1218 voltage (ac) 500vrms breakdown voltage> specification and without open/short resistance to soldering heat immerse the specimen in the solder po t at 2605c. for 101 seconds. have the specimen stabilized at room temp erature for 30 mi nutes minimum. measure the resistance to determine r/r(%). (0.5%+0.05 ? ) for 1% tol. (1.0%+0.05 ? ) for 5% tol. no visible damage r 2 ?r 1 r 1 (t 2 ?t 1 )
w ww.yageo.com mar. 09, 2004 v.0 chip resistor surface mount 6 7 series rc 1218 type test method acceptance standard moisture resistance place the specimen in the test chamber and subject to 42 damp heat cycles. each one of which consists of the steps 1 to 7 as figure 10. the total length of test is 1,000 hours. have the specimen stabilized at room temperature for 24 hours after testing. measure the resistance to determine r/r(%). (0.5%+0.05 ? ) for 1% tol. (2.0%+0.05 ? ) for 5% tol. no visible damage life place the specimen in the oven at 702c. apply the rated voltage to the specimen at the 1.5 hours on and 0.5 hour off cycle. the total length of test is 1,000 hours. have the specimen stabilized at room temperature for one hour minimum after testing. measure the r/r(%). (1%+0.05 ? ) for 1% tol. (3%+0.05 ? ) for 5% tol. no visible damage solderabilit y immerse the specimen in the so lder pot at 2355c for 2 sec. at least 95% solder coverage on the termination bending strength mount the specimen on a test board as shown in the figure 9. slowly apply the force till the board is bent for 51 sec. measure the r/r(%) at this position. type RC1218 bent distance (d) 2mm (1.0%+0.05 ? ) for 1% tol. (1.0%+0.05 ? ) for 5% tol. no visible damage fig. 9 principle of the bending test
w ww.yageo.com mar. 09, 2004 v.0 chip resistor surface mount 7 7 series rc 1218 75 initial drying 24 hours 90 ? 98% rh 80 ? 98% rh temperature tolerance 2 c (3.6 f) unless otherwise specified initial measurements as specified in 2.2 0 step1 step3 step2 prior to first cycle only step4 one cycle 24 hours; repeat as specified in 2.5 voltage applied as specified in 2.4 circulation of conditioning air shall be at a minimum cubic rate per minute equivalent to 10 times the volume of the chamber step6 step7 hbk073 step5 51015 end of final cycle; measurements as specified in 2.7 optional sub-cycle if specified (2.3); sub-cycle performed during any 5 of the first 9 cycles; humidity uncontrolled during sub-cycle 20 time [h] temperature [ c] 25 50 25 0 90 ? 98% rh 90 ? 98% rh + 10 c ( + 18 f) ? 2 c ( ? 3.6 f) 80 ? 98% rh rate of change of temperature is unspecified, however, specimens shall not be subjected to radiant heating from chamber conditioning processes fig. 10 conditions by change of temperature
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