1 iso-9001 registered 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) d c a 1.50 min. (38.1) b semi-precision power wirewound resistor as series 1/4 watt to 10 watts 5%, 3%, 1%, .5% tolerance 0.1 ohm to 175k ohms resistance wire tcr 20 ppm/c specifications: inductance of as-1/2 is less than 1h at 1mhz. * typical inductan ce of as-1c <5 ohms is < 1h. to order non-inductive types, add the prefix "n". example: nas-1, nas-2c, etc. lower values available upon reque st. 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 freon degreasing. consult factory for special requirements. ? as marking available in alpha numeric or colorbanding - identification available. heat conducting ceramic substrate alpha - digital marking silicone conformal coating all welded cap and lead assembly alloy resistance wire wound to specific parameters including tcr's from 20 to +5500 ppm/c equivalent mil-r-26 style rw81 rw70u rw-69v/ rw79u rw74u/ rw67v rw68v/ rw78u power rating 275c max. hot spot (watts) 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 a 0.032 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) *leads 60/40 are solder plated. as-1c leads are copper. all others are 40% conductivity copper sheathed steel. 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 wirewound and film technologies division 736 greenway road ? boone, north carolina 28607-1860 ? tel: 828-264-8861 ? fax: 828-264-8866 ? www.irctt.com
2 iso-9001 registered test condition load life 1000 hours moisture resistance temperature cycle short time overload low temperature operation solder heat shock vibration 25 75 125 175 225 275 0 75 100 125 150 175 200 as-1/4, 1/2, 1 as-3 as-2a, 2c as-2 as-5, 10 as-7, 25 0 40 80 120 160 200 50 100 150 200 250 275 as-7, 10 as-5 as-2a, 2c as-2 as-2b as-1/2 as-1/4 25 power derating: environmental testing at 25c: how to order: sample part no.: as-3 27r0 0.25% type power 3 =3 watts (see specification chart for other power ratings) resistance value expressed in ohms (standard eia/mil values) tolerance 5%, 3%, 1%, 0.5% max d d d d d r 1.0% 1.0% 0.5% 0.5% 0.5% 0.25% 0.5% 0.5% temperature rise @ 125c: ambient temperature (c) percent of 125c power rating percent of 25c power rating hot spot temperature (c) temperature rise @ 25c: 0.1 0.2 0.5 1 2 5 10 0 2 4 6 8 10 12 14 as-2a as-3 as-2 as-2b as-1 as-2c as-1/2 as-1/4 selected pulse-handling capability @ 125c: resistance (ohms) energy (watts-second) as-3, as-1, as-2 as-2b wirewound and film technologies division 736 greenway road ? boone, north carolina 28607-1860 ? tel: 828-264-8861 ? fax: 828-264-8866 ? www.irctt.com 0 20406080100 125 150 200 250 275 as-7, 10 as-5 as-3, 2a, 2c as-2 as-2b as-1/2 as-1/4 percent of 125c power rating hot spot temperature (c) as2a, as2c as-3, as-5 0 40 80 120 160 200 as-7, 2b
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