general note irc reserves the right to make changes in product speci?cation without notice or liability. all information is subject to ircs own data and is considered accurate at time of going to print. a subsidiary of tt electronics 1005 ? 1/4 watt to 10 watts ? 5%, 3%, 1%, .5% tolerance ? 0.1 ohm to 175k ohms ? resistance wire tcr 20 ppm/c ? rohs-compliant version available alpha - digital marking wirewound and film technologies division 736 greenway road ? boone, north carolina 28607-1860 ? tel: 828-264-8861 ? fax: 828-264-8866 ? www.irctt.com heat conducting ceramic all welded cap and lead silicone conformal coating alloy resistance wire wound to speci?c parameters including tcr's from d (lead diameter) 0.020 (0.5) 0.020 (0.5) 0.020 (0.5) 0.025 (0.64) 0.025 (0.64) 0.032 (0.8) 0.032 (0.8) 0.032 (0.8) 0.032 (0.8) 0.040 (1.0) 0.040 (1.0) 0.040 (1.0) 0.040 (1.0) specifications: inductance of as-1/2 is less than 1h at 1mhz. * typical inductance of as-1c <5 ohms is < 1h. to order non-inductive types, add the pre?x "n". example: nas-1, nas-2c, etc. lower values available upon request. dimensions (inches and (mm)): please note lead length dimension change on the following two items only: as-2b 1.3 min as-2c 1.3 min note: ? coating and marking is resistant to normal degreasing. consult factory for special requirements. similar mil-r-26 style rw81 rw70u rw79u rw74u/ rw78u power rating 275c max. hot spot commercial range (ohms) non-inductive range (ohms) available resistance (ohms) 125c 0.5 0.5 1 1 2 3 2 3 5 7 10 25c 1 1 2 2 3 4 3 5 7 9 14 min. 0.1 0.1 0.1 .05 0.1 0.1 0.1 0.1 0.1 0.1 0.1 max. 1.0k 6.0k 7.5k 2k 20k 24k 18k 30k 60k 90k 175k min. * * 0.1 * 0.5 0.5 0.2 0.5 0.8 1.0 3.0 max. * * 3.8k * 10k 12k 7.5k 15k 30k 45k 50k 0.5%, 1% 1-1k 1-6k 1-7.5k 1-2k 1-20k 1-24k 1-18k 1-30k 1-60k 1-90k 1-175k 3%, 5% 0.1-1k 0.1-6k 0.1-7.5k .05-2k 0.1-20k 0.1-24k 0.1-18k 0.1-30k 0.1-60k 0.1-90k 0.1-175k irc type as-1/4 as-1/2 as-1 as-1c as-2 as-2b as-2c as-3 as-5 as-7 as-10 a0.032 0.250 (6.4) 0.312 (7.9) 0.367 (9.3) 0.256 (6.5) 0.480 (12.2) 0.540 (13.7) 0.489 (11.0) 0.687 (17.5) 0.875 (22.2) 1.250 (31.8) 1.812 (46.0) b (max) 0.094 (2.4) 0.094 (2.4) 0.125 (3.2) 0.115 (2.9) 0.250 (6.3) 0.219 (5.6) 0.157 (4.0) 0.282 (7.2) 0.344 (8.8) 0.344 (8.8) 0.385 (9.8) c (max) 0.312 (7.9) 0.375 (9.5) 0.429 (10.9) 0.303 (7.7) 0.600 (15.2) 0.663 (16.6) 0.594 (15.1) 0.812 (20.6) 0.980 (24.9) 1.375 (35.0) 1.937 (49.2) irc type as-1/4 as-1/2 as-1 as-1c as-2 as-2b as-2c as-3 as-5 as-7 as-10 semi-precision power wirewound resistor as series
a subsidiary of tt electronics 1005 power derating: test condition load life 1000 hours moisture resistance temperature cycle short time overload low temperature operation solder heat shock vibration environmental testing at 25c: max ? r 1.0% 1.0% 0.5% 0.5% 0.5% 0.25% 0.5% 0.5% ambient temperature (c) percent of 125c power rating selected pulse-handling capability @ 125c: resistance (ohms) energy (watts-second) wirewound and film technologies division 736 greenway road ? boone, north carolina 28607-1860 ? tel: 828-264-8861 ? fax: 828-264-8866 ? www.irctt.com how to order: sample part no.: as - 3 27r0 1 % lf type power 3 =3 watts (see speci?cation chart for other power ratings) resistance value expressed in ohms (standard eia/mil values) tolerance 5%, 3%, 1%, 0.5% lead free construction 2 a 1 , 1 c , 2 2 c 5 , 1 0 2 b
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