General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s 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 specific 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 1µH at 1MHz. * Typical inductance of AS-1C <5 ohms is < 1µH.
To order non-inductive types, add the prefix "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 275°C
Max. Hot Spot
Commercial Range
(ohms)
Non-Inductive Range
(ohms)
Available Resistance
(ohms)
125°C
0.5
0.5
1
1
2
3
2
3
5
7
10
25°C
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)
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 25°C:
MAX ∆R
1.0%
1.0%
0.5%
0.5%
0.5%
0.25%
0.5%
0.5%
Ambient Temperature (°C)
Percent of 125°C Power Rating
SELECTED PULSE-HANDLING
CAPABILITY @ 125°C:
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 specification 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
, 1C
, 2
2 C
5,10
2 B
