AS SERIES
SEMI-PRECISION POWER WIREWOUND RESISTOR
•
•
•
•
•
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
Alloy resistance wire
wound
to specific parameters
including TCR's from
All welded
cap
and lead
Alpha -
Digital
Marking
Silicone
conformal
coating
Heat conducting
ceramic
SPECIFICATIONS:
Similar
MIL-R-26
Style
RW81
RW70U
RW79U
Power Rating 275°C
Max. Hot Spot
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
Commercial Range
(ohms)
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
Non-Inductive Range
(ohms)
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
Available Resistance
(ohms)
0.5%, 1%
3%, 5%
1-1K
1-6K
1-7.5K
1-2K
1-20K
1-24K
1-18K
1-30K
1-60K
1-90K
1-175K
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
RW74U/
RW78U
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.
* Typical inductance of AS-1C <5 ohms is < 1µH.
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
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
NOTE:
•
Coating and marking is resistant to normal degreasing.
Consult factory for special requirements.
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)
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
POWER DERATING:
, 1C
SELECTED PULSE-HANDLING
CAPABILITY @ 125°C:
2A
Percent of 125°C Power Rating
,2
2C
5,10
2B
Energy (watts-second)
1
Ambient Temperature (°C)
Resistance (ohms)
ENVIRONMENTAL TESTING AT 25°C:
TEST CONDITION
Load Life 1000 hours
Moisture Resistance
Temperature Cycle
Short Time Overload
Low Temperature Operation
Solder Heat
Shock
Vibration
MAX
∆R
1.0%
1.0%
0.5%
0.5%
0.5%
0.25%
0.5%
0.5%
HOW TO ORDER:
Sample Part No.:
AS - 3
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
27R0
1%
LF
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
A subsidiary of TT electronics
1005
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