commercial cr0503 cr0805 cr1005 cr1206 cr2010 CR2512 notes power rating at 70? watts 0.063 0.125 0.125 0.25 0.5 1.0 resistance range ohms 1r to 10m 1r to 100m 1r to 1m limiting element voltage volts 50 100 150 200 400 500 tcr -55 to +155? ppm/? <10 ohms 350: 10 to 100 ohms 200: 100 to 1m ohm 100: >1m ohm 250 resistance tolerance % 0.1, 0.25, 0.5, 1, 2, 5 see table of value ranges ambient temperature range ? -55 to 155 approved cecc 40401-004 cr0805 cr1206 power rating at 70? watts 0.125 0.25 resistance range ohms 1r to 10m limiting element voltage volts 100 200 tcr -55? to +125? ppm/? <10 ohms 200: 10 to 1m 100: >1m 200 tcr +20? to +70? ppm/? <10 ohms 200: 10 to 1m 50: >1m 100 resistance tolerance % 0.5, 1, 2, 5 see table of value ranges ambient temperature range ? -55 to +125 surface mounted resistors cr series cecc released products custom designs/sizes available any resistance value available within specified range terminations available for wire bonding or soldering available in sizes down to 0503 resistance range 1 ohm to100m ohms tolerances down to 0.1% solder terminations have a nickel barrier layer shorting links available general note welwyn components reserves the right to make changes in product specification without notice or liability. all information is subject to welwyn s own data and is considered accurate at time of going to print. ?welwyn components limited ?bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com electrical data issue f ?10.05 a subsidiary of tt electronics plc welwyn components approved cecc 40401-008 cr0805 cr1206 cr2010 CR2512 power rating at 70? watts 0.125 0.25 0.5 1.0 resistance range ohms 1r to 10m 1r to 10m 1r to 1m 1r to 1m limiting element voltage volts 100 200 400 500 tcr -55? to +155? ppm/? <10 ohms 200: 10 to 1m ohms 100: >1m ohms 250 resistance tolerance % 0.1, 0.25, 0.5, 1, 2, 5 see table of value ranges ambient temperature range ? -55 to 155 approved cecc 40401-003 cr0805 cr1206 power rating at 70? watts 0.063 0.125 resistance range ohms 1r to 3m 1r to 5m limiting element voltage volts 100 200 tcr -55? to +125? ppm/? <5 ohms 500: 5 to 10 ohms 350: 10 to 3m ohms 100: >3m ohms 250 resistance tolerance % 0.25, 0.5, 1, 2, 5 see table of value ranges ambient temperature range ? -55 to 125 17 values e24 & e96 preferred any value to order thermal impedance ?/watt 800 360 290 200 80 70 mounted on custom designed pcb s
dimensions of standard styles (mm) & weight (g) wrap around style l w t max a b ? cwt 0503 1.25?.2 0.63?15 0.5 not available 0.20?.1 0.005 0805 2.0?.2 1.25?.15 0.6 0.3?.15 0.9 min 0.3?.1 0.009 1005 2.5?.3 1.25?.2 0.7 not available 0.4?.15 0.015 1206 3.2?.2 1.6?.2 0.7 0.4?.2 1.7 min 0.4?.15 0.020 2010 5.1?.3 2.5?.2 0.7 0.6?.3 3.0 min n/a 0.036 2512 6.5?.3 3.2?.2 0.7 0.6?.3 4.4 min n/a 0.055 surface mounted resistors cr series ?welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com cecc 40401-008 cecc40401-004 cecc40401-003 actual requirements requirements requirements maximum typical load at rated power: 1000 hours at 70? ? r% 2 2 3m3 2 2 0.25 >3m3 3 shelf life: 12 months at room temp. ? r% - - - 0.1 0.02 derating from rated power at 70? zero at 155? zero at 125? zero at 125? overload ? r% 0805:1 1206:0.5 0.5 2 1 0.1 dry heat: 1000 hours at uct ? r% 2 1 3m3 2 to 10m 1 0.2 (125? for 003 & 004 - 155? for 008) >3m3 3 >10m 2 >10m 1 long term damp heat ? r%2221 0.25 temperature rapid change ? r% 0.5 0.5 1 0.25 0.05 resistance to solder heat ? r% 0.5 0.5 2 0.25 0.05 voltage proof volts 0805 : 200 1206 : 300 0503 : 100 2010 : 400 2512 : 500 all others : 500 physical data ? this dimension determines the number of conductors which may pass under the surface mounted device. issue f ?10.05 welwyn components 18 performance data value ranges (ohms) t w a a b l wrap-around terminations (3 faces) t w l planar terminations c c construction thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. terminations planar (or single-sided) termination is gold and suitable for wire-bonding; wrap-around is suitable for soldering. solderability wrap-around terminations have an electroplated nickel barrier and solder coating, this ensures excellent ?each?resistance properties and solderability. they will withstand immersion in solder at 260? for 30 seconds. marking all relevant information recorded on the primary package or reel. tolerance % size 5 2 1 0.5 0.25 0.1 0503 1 to 10m 1 to 10m 10 to 10m 100 to 1m n/a n/a 0805 1 to 100m 1 to 50m 1 to 20m 10 to 10m 100 to 1m 100 to 1m 1005 1 to 100m 1 to 50m 1 to 20m 10 to 10m 100 to 1m 100 to 1m 1206 1 to 100m 1 to 50m 1 to 25m 10 to 10m 100 to 1m 100 to 1m 2010 1 to 1m 1 to 1m 1 to 1m 10 to 10m 100 to 1m n/a 2512 1 to 1m 1 to 1m 1 to 1m 10 to 10m 100 to 1m n/a alternative styles for surface mounting resistors note: an 0.01 ohm addition to be added to the performance of all resistors <10 ohms
surface mounted resistors cr series ?welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com issue f ?10.05 welwyn components 19 operating temperature range the chips themselves can operate at a maximum temperature of 155? (see performance claims above). for soldered chips, the joint temperature should not exceed 110?. this condition is met when the stated power levels at 70? are used. mounting this chip resistor is ideally suited for handling by automatic methods due to its rectangular shape and the small dimensional tolerances. electrical connection to a ceramic substrate or to a printed circuit board can be made by wire bonding (eg suffix ??in cr0805g) or by reflow soldering of wrap-around terminations (eg suffix ??in cr0805f). the ??terminations provide good leach properties and ensure reliable contact. due to the robust construction the resistor chip can be immersed in the solder bath for 30 seconds at 260?. this enables the resistor to be mounted on one side of a printed circuit board and other wire-leaded components on the other side. packaging wrap-around termination chip resistors are supplied taped and reeled on standard 8mm tape to iec 286-3. quantity per reel; 3000 max. planar terminations resistor chips are supplied in waffle packs. application notes type cr0805 10m b resistance value (iec62 code) tolerance (iec62 code) b 0.1% c 0.25% d 0.5% f1% g2% j5% ordering procedure specify type reference, value and tolerance as shown in this example of cr0805 10m 0.1%:
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