AS SERIES
SEMI-PRECISION POWER WIREWOUND RESISTOR
•
•
•
•
•
Alloy resistance wire
wound
to specific parameters
including TCR's from
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
All welded
cap
and lead
Silicone
conformal
coating
Heat conducting
ceramic
SPECIFICATIONS:
Similar
MIL-R-26
Style
RW81
Power Rating 275°C
Max. Hot Spot
Commercial Range
(ohms)
Non-Inductive Range
(ohms)
RW79U
125°C
0.5
0.5
1
1
2
25°C
1
1
2
2
3
Min.
0.1
0.1
0.1
.05
0.1
Max.
1.0K
6.0K
7.5K
2K
20K
Min.
*
*
0.1
*
0.5
Max.
*
*
3.8K
*
10K
AS-2B
AS-2C
AS-3
AS-5
RW74U/
3
2
3
5
4
3
5
7
0.1
0.1
0.1
0.1
24K
18K
30K
60K
0.5
0.2
0.5
0.8
AS-7
AS-10
RW78U
7
10
9
14
0.1
0.1
90K
175K
1.0
3.0
IRC Type
AS-1/4
AS-1/2
AS-1
AS-1C
AS-2
RW70U
Inductance of AS-1/2 is less than 1µH at 1MHz.
To order non-inductive types, add the prefix "N". Example: NAS-1, NAS-2C, etc.
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
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)
Available Resistance
(ohms)
0.5%, 1%
3%, 5%
1-1K
1-6K
1-7.5K
1-2K
1-20K
0.1-1K
0.1-6K
0.1-7.5K
.05-2K
0.1-20K
12K
7.5K
15K
30K
1-24K
1-18K
1-30K
1-60K
0.1-24K
0.1-18K
0.1-30K
0.1-60K
45K
50K
1-90K
1-175K
0.1-90K
0.1-175K
* Typical inductance of AS-1C <5 ohms is < 1µH.
Lower values available upon request.
NOTE:
• Coating and marking is resistant to normal degreasing.
Consult factory for special requirements.
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)
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)
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
WIREWOUND AND FILM TECHNOLOGIES DIVISION
1005
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
