 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 usr unr 2-t220 / t220b / t221 uss uns 2-t220 precision foil resistors type usr / uss unr /uns resistance range 0.5 ohms to 150 kohms 0.5 ohms to 5 kohms power rating free air 70c (r<50r0) free air 70c (r>50r0) with heatsink (r<50r0) with heatsink (r>50r0) 1.5w 1.0w 10w 6w 1.5w 1.0w 15w 10w thermal resistance rthj-c r<50r0 r>50r0 10.8 k/w 18.8 k/w 6.8 k/w 10.8 k/w tolerances from 0.5 ohms from 10.0 ohms from 25.0 ohms from 50.0 ohms 0.1% / 0.25% / 0.5% / 1% 0.05% / 0.1% / 0.25% / 0.5% / 1% 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% 0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% stability 0.01% shelf life stability 25ppm / ?r after 1 year 50ppm / ?r after 3 year temperature coeffcient max. 5ppm/k (-55 to 155c) typ. 3ppm/k (-55 to 125c) voltage proof 1 kvdc thermal emf < 0.1v/k operating temperature range -55 to 155c resistor material nicr-foil substrate al 2 o 3 aln housing epoxy + cu heatsink nickel plated connector material cu tinned terminals 2 max. torque 1.0 nm notes specially designed for applications with fast changing electrical load specifications part description: part type - resistance - contact - tolerance - tcr example: unr 2-t220b 5.7kohms c 0.5% 3ppm ordering information ? resistances from 0.5ohm to 150kohms ? power rating to 10watt ? resistance tolerances to 0.01% ? tcr to 3ppm/k ? load stability to 0.01% ? to-220 housing ? convenient smd d2pak available
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 0 20 40 60 80 100 120 25 50 85 100 115 130 145 155 temperature of the backplate(c) power (% from nominal power) -800 -600 -400 -200 0 200 400 600 800 -50 -25 0 25 50 75 100 125 -5ppm/k +5ppm/k nominal ?r/r nominal spread 2.3ppm/k nominal spread 2.3ppm/k temperature (c) ?r/r (ppm) derating temperature coeffcient specifications (continued) usr unr 2-t220 / t220b / t221 uss uns 2-t220 precision foil resistors dimensions dimension mm tol. (mm) inches tol. (inches) a 12.70 0.2 0.50 0.008 b 10.16 0.2 0.40 0.008 c 0.76 0.1 0.03 0.004 d 5.08 0.1 0.20 0.004 e 4.00 0.1 0.16 0.004 f 1.20 0.1 0.05 0.004 g 14.60 0.2 0.57 0.008 h 15.00 0.2 0.59 0.008 i 17.33 0.2 0.68 0.008 j 0.40 0.1 0.02 0.004 k 1.85 0.1 0.07 0.004 dimension mm inches a 12.10 0.476 b 11.16 0.439 c 18.33 0.722 d 5.08 0.200 e 1.76 0.069 f 3.20 0.126 uss 2-t220 / uns 2-t220 power rating notes - the u-series resistors must be attached to a suitable heatsink. the maximum internal resistor temperature is 155c. to specify an appropriate heatsink use the following formula : r qh = t max - ( p x r qr ) - t a p where: r qh = thermal resistance of heatsink ( k/w ) r qr = thermal resistance of resistor ( k/w ) t max = maximum temperature of resistor t a = ambient temperature of heatsink ( c ) p = power through resistor ( w ) riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 dimensions specifications (continued) usr unr 2-t220 / t220b / t221 uss uns 2-t220 precision foil resistors dimension mm tol. (mm) inches tol. (inches) a 15.30 0.2 0.60 0.008 b 10.00 0.2 0.39 0.008 c 2.80 0.1 0.11 0.004 d ?3.7 0.1 ?0.146 0.004 e 2.00 0.1 0.08 0.004 f 5.08 0.1 0.20 0.004 g 1.27 0.1 0.05 0.004 h 4.60 0.1 0.18 0.004 i 6.00 0.2 0.24 0.008 j 35.30 2.0 1.39 0.079 k ?0.6 0.1 ?0.02 0.004 l 2.41 0.1 0.09 0.004 usr 2-t220b / unr 2-t220b usr 2-t220 / unr 2-t220 usr 2-t221 / unr 2-t221 dimension mm tol. (mm) inches tol. (inches) a 17.30 0.2 0.68 0.008 b 10.16 0.2 0.40 0.008 c 6.00 0.1 0.24 0.004 d ?3.7 0.1 ?0.146 0.004 e 16.40 0.2 0.65 0.008 f 5.08 0.1 0.20 0.004 g 0.76 0.1 0.03 0.004 h 1.30 0.1 0.05 0.004 i 10.00 0.2 0.39 0.008 i (c-contact) 13.80 0.2 0.54 0.008 j 2.00 0.1 0.08 0.004 k 1.20 0.1 0.05 0.004 l 4.00 0.1 0.16 0.004 m 2.90 0.1 0.11 0.004 n 0.40 0.1 0.02 0.004 o 1.85 0.1 0.07 0.004 dimension mm tol. (mm) inches tol. (inches) a 18.30 0.2 0.72 0.008 b 10.16 0.2 0.40 0.008 c 3.70 0.1 0.15 0.004 d ?3.2 0.1 ?0.126 0.004 e 16.40 0.2 0.65 0.008 f 5.08 0.1 0.20 0.004 g 0.76 0.1 0.03 0.004 h 1.30 0.1 0.05 0.004 i 10.00 0.2 0.39 0.008 i (c-contact) 13.80 0.2 0.54 0.008 j 2.00 0.1 0.08 0.004 k 1.20 0.1 0.05 0.004 l 4.00 0.1 0.16 0.004 m 3.90 0.1 0.15 0.004 n 0.40 0.1 0.02 0.004 o 1.85 0.1 0.07 0.004 |
Price & Availability of UNR2-T220B57KOHMS
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |