a subsidiary of tt electr onics plc 07 . 08 general note w elwyn components r eserves the right to make changes in pr oduct specification without notice or liability . all information is subject to w elwyn? s own data and is consider ed accurate at time of going to print. ? w elwyn components limited bedlington northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com pr ecision sur face mount resistors pr ecision metal film technology extended ohmic range 1r - 3m pr ecision to 0.01% and 5ppm/c tcr grades 50, 25, 15, 10, 5ppm/c passivated range for superior humidity performance load life stability and humidity to 0.05% power (w) pcf0201 pcf0402 pcf0603 pcf0805 pcf1206 pcf1210 pcf2010 pcf2512 0.05 0.063 0.063 0.1 0.125 0.25 0.25 0.5 t ype tcr (ppm/c limiting element v oltage (v) 100 25 50 25 15 10 5 50 25 15 10 5 50 25 15 10 5 50 25 15 10 5 25 10 5 50 25 15 10 5 50 25 15 10 5 15 25 75 100 150 200 150 150 ohmic v alue range * 0.1% 10r-200k 10r-200k 50r-12k 50r-12k 50r-3k 4r7-1m 4r7-1m 4r7-332k 4r7-332k 25r-15k 25r-15k 25r-15k 4r7-2m 4r7-2m 4r7-1m 4r7-1m 25r-30k 25r-30k 25r-30k 4r7-2m5 4r7-2m5 4r7-1m 4r7-1m 25r-50k 25r-50k 25r-50k 51r-2m 100r-330k 100r-200k 4r7-3m 4r7-3m 4r7-1m 4r7-1m 25r-100k 25r-100k 25r-100k 4r7-3m 4r7-3m 4r7-1m 4r7-1m 25r-100k 25r-100k 25r-100k 0.5% 10r-30r (1%) 33r -22k 10r-200k 10r-200k 50r-12k 2r-1m 2r-1m 4r7-332k 1r-2m 1r-2m 4r7-500k 1r-2m5 1r-2m5 4r7-1m 51r-2m 100r-330k 100r-200k 1r-3m 1r-3m 4r7-1m 1r-3m 1r-3m 4r7-1m 0.25% 10r-200k 10r-200k 50r-12k 2r-1m 2r-1m 4r7-332k 1r-2m 1r-2m 4r7-500k 1r-2m5 1r-2m5 4r7-1m 1r-3m 1r-3m 4r7-1m 1r-3m 1r-3m 4r7-1m 0.05% 50r-12k 50r-12k 50r-12k 50r-3k 4r7-150k 4r7-150k 25r-100k 4r7-500k 4r7-500k 25r-200k 4r7-1m 4r7-1m 25r-500k 4r7-1m 4r7-1m 25r-500k 4r7-1m 4r7-1m 25r-500k 0.01% 50r-12k 50r-12k 50r-12k 50r-12k 50r-3k 25r-100k 25r-100k 25r-100k 25r-100k 25r-200k 25r-200k 25r-200k 25r-200k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k 25r-500k * standar d values e24 or e96. other values may be available by r equest. electrical data - standar d range pcf series
construction a thi n - f ilm materi a l i s s e lect ive l y d epo site d o n a 9 6 % alumina s u bst rat e t o gethe r w ith m etallic c o n tac t s a t e ach e n d o f t h e r e sisto r . t h e u n adju s t e d r esistors a r e heat t r eated t o give the r equi r e d t c r a n d s t a b ilit y , t h e n a p r e cisely c o n t r o lled l a s e r t r i m p r o c e s s adjust s the r esistance value. epoxy pr otection is applied and wrap-ar ound terminations ar e added and plated with nickel then t in. each r esistor is measur ed immediately befor e packing into tape. t erminations the chips ar e supplied with 100% sn matte plated wrap-ar ound terminations suitable for soldering. pr ecision sur face mount resistors 0.5% 25r-25k 25r-25k 25r-200k 25r-200k 25r-400k 25r-400k 25r-500k 25r-500k 25r-600k 25r-600k 25r-600k 25r-600k power (w) t ype tcr (ppm/c limiting element v oltage (v) 50 25 50 25 50 25 50 25 50 25 50 25 ohmic v alue range * 0.25% 25r-25k 25r-25k 25r-200k 25r-200k 25r-400k 25r-400k 25r-500k 25r-500k 25r-600k 25r-600k 25r-600k 25r-600k 0.1% 25r-25k 25r-25k 25r-200k 25r-200k 25r-400k 25r-400k 25r-500k 25r-500k 25r-600k 25r-600k 25r-600k 25r-600k pcf 0 402 p pcf 0 603 p pcf 0 805 p pcf 1 206 p pcf 2 010 p pcf 2 512 p 0.063 0.063 0.1 0.125 0.25 0.5 25 50 100 150 150 150 * s t andard values e24 or e96. other values may be available by request. w 0.3 0.05 0.5 0.05 0.8 0.2 1.25 0.2 1.6 0.2 2.6 0.2 2.4 0.2 3.1 0.2 l 0 . 6 0 . 0 5 1 . 0 0 . 0 5 1.6 0.2 2.0 0.2 3.2 0.2 3.2 0.2 4.9 0.2 6.3 0.2 tmax 0.26 0.40 0.55 0.65 0.65 0.50 0.65 0.65 a 0.12 0.05 0.2 0.1 0.3 0.2 0.4 0.2 0.5 0.2 0.45 0.2 0.5 0.2 0.5 0.2 c 0.12 0.05 0.2 0.1 0.3 0.2 0.4 0.2 0.5 0.2 0.5 0.2 0.6 0.2 0.6 0.2 t w a a l w rap-around terminations (3 faces) c 0201 0402 0603 0805 1206 1210 2010 2512 dimensions (mm) & w eight (mg) wt 1 3 6 9 20 25 36 55 07 . 08 ? w elwyn components limited bedlington northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com pcf series physical data * s t andard values e24 or e96. other values may be available by request. 50 25 50 25 50 25 pcf0603h pcf0805h pcf1206h 0.1 0.125 0.25 0.5% 10r-332k 10r-332k 4r7-1m 4r7-1m 4r7-1m 4r7-1m power (w) t ype tcr (ppm/c limiting element v oltage (v) ohmic v alue range * 0.25% 10r-332k 10r-332k 4r7-1m 4r7-1m 4r7-1m 4r7-1m 0.1% 10r-332k 10r-332k 4r7-1m 4r7-1m 4r7-1m 4r7-1m 50 150 200 electrical data - high power range electrical data - passivated range
0.05% tolerance 0603 to 2512 0.25% 0.3% 0.5% 0.25% 0.1% 0.2% load life humidity short term overload high temperatur e operation t emperatur e cycle resistance to solder heat solderability maximum change (+0.05r) chip size 0402 0.5% 0.3% 0.5% 0.25% 0.1% 0.2% 0.01% tolerance 0603 to 2512 0.05% 0.05% 0.05% 0.25% 0.05% 0.05% conditions t est parameters 1000 hours rated load @ 70c 1000 hours @ 40c, 90 - 95%rh 6.25 x rate d power , o r 2 x l e v , f o r 5 s e c 1000 hours at 125c 5 cycles -55 c, 125c 270c, 10 sec 235c, 2 sec 95% minimum coverage 0.5% 0.5% 0.5% 0.5% 0.25% 0.2% 95% minimum coverage load life humidity short term overload high temperatur e operation t emperatur e cycle resistance to solder heat solderability maximum change (+0.05r) conditions t est parameters 1000 hours rated load @ 70c 1000hrs @ 40c, 90 - 95%rh 6.25 x rate d powe r , o r 2 x l e v , f o r 5 s e c 1000 hours at 155c 5 cycles -55c, 150c 270c, 10 sec 235c, 2 sec 0603 to 2512 0.05% 0.05% 0.02% 0.05% 0.02% 0.02% load life humidity short term overload high temperatur e operation t emperatur e cycle resistance to solder heat solderability maximum change (+0.05r) conditions t est parameters 1000 hours rated load @ 70c 1000hrs @ 40c, 90 - 95%rh 6.25 x rate d powe r , o r 2 x l e v , f o r 5 s e c 1000 hours at 125c 5 cycles -55 c, 125c 270c, 10 sec 235c, 2 sec 95% minimum coverage 0402 0.25% 0.5% 0.1% 0.5% 0.1% 0.1% solderability derating curve the terminations have an electr oplated nickel barrier and tin coating. this ensur es excellent 'leach' r esistance pr operties and solderability . packaging pcf resistors ar e supplied taped and r eeled as per iec 286-3. application notes pcf r esistors ar e ideally suited for handling by automatic methods due to their r ectangular shape and the small dimensional tolerances. electrical connection to a ceramic substrate or to a printed cir cuit boar d can be made by r eflow or wave soldering of wrap-ar ound terminations. pr ecision sur face mount resistors 07 . 08 ? w elwyn components limited bedlington northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com pcf series per for mance data - standar d range per for mance data - high power range per for mance data - passivated range 0 % 1 0 0 % t ( c ) 7 0 1 2 5 1 5 5 p / p r p c f , p c f - p p c f - h
t ype size range w rap-ar ound terminations pr ovide good leach pr operties and ensur e r eliable contact. due to the r obust construction, the pcf can be immersed in the solder bath for 30 seconds at 260 c. this enables the r esistor to be mounted on one side of a printed cir cuit boar d and wir e-leaded components applied on the other side. pcf r esist ors t h emselves c a n o p era t e a t a m a xim u m t e mperatu r e o f 1 2 5 c ( see p e rfo r m anc e a b o ve) ( 1 5 5 c f o r hig h p o w e r g r ades) . for solder ed r esistors, the joint temperatur e should not exceed 110 c. this condition is met when the stated power levels at 70 c kilohms ar e used. or dering pr ocedur e pr ecision sur face mount resistors pcf 0603 - 1 1 - 1k54 b i 50,000/r eel 10,000/r eel 5000/r eel 4000/r eel 1000/r eel i 0201 0402 0603, 0805, 1206, 1210 2010, 2512 0402, 0603, 0805, 1206, 2010, 2512 standar d t1 please enquir e to confirm availability of 1000 piece r eels 0.25% 0.5% 0.01% 0.05% 0.1% l w b c d 25ppm/ c 50ppm/ c 5ppm/c 10ppm/c 15ppm/c 13 12 11 r 2 standar d high power passivated h p tcr resistance value (iec62 code) t olerance packing 07 . 08 ? w elwyn components limited bedlington northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com pcf series p
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