ISO-9001
Registered
SEMI-PRECISION
POWER WIREWOUND
Alloy resistance wire wound
to specific parameters
including TCR's from ±20 to
+5500 ppm/°C
Alpha - Digital
Marking
AS
SERIES
•
•
•
•
•
All welded cap
and lead
assembly
Silicone conformal
coating
1/2 watt to 10 watts
Heat conducting
±5%, ±3%, ±1%, ±.5% tolerance
ceramic substrate
0.1 ohm to 175K ohms
Resistance wire TCR ±20 ppm/°C
AS-SM for surface mount capabilities. See Surface Mount section of this catalog for details.
Manufactured in Barbados
SPECIFICATIONS:
Power Rating 275°C
Equivalent Max. Hot Spot (watts)
MIL-R-26
125°C
25°C
Style
IRC Type
Commercial Range
(ohms)
Min.
Max.
Non-Inductive Range
(ohms)
Min.
Max.
Available Resistance
(ohms)
0.5%, 1%
3%, 5%
LAS-1
LAS-3
AS-1/4
AS-1/2
AS-1
AS-1C
AS-2
AS-2B
AS-2C
AS-3
AS-5
AS-7
AS-10
RW68V/
RW78U
RW74U/
RW67V
RW81
RW70U
RW-69V/
RW79U
1
2
0.5
0.5
1
1
2
3
2
3
5
7
10
2
3
1
1
2
2
3
4
3
5
7
9
14
0.1
0.1
0.1
0.1
0.1
.05
0.1
0.1
0.1
0.1
0.1
0.1
0.1
7.5K
18K
1.0K
6.0K
7.5K
2K
20K
24K
18K
30K
60K
90K
175K
0.1
0.2
*
*
0.1
*
0.5
0.5
0.2
0.5
0.8
1.0
3.0
3.8K
7.5K
*
*
3.8K
*
10K
12K
7.5K
15K
30K
45K
50K
1-7.5K
1-18K
1-1K
1-6K
1-7.5K
1-2K
1-20K
1-24K
1-18K
1-30K
1-60K
1-90K
1-175K
0.1-6K
0.1-18K
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
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.
AS DIMENSIONS
(Inches and (mm)):
LAS-1 1.475
LAS-3 1.403
1.50 min.
(38.1)
B
A
C
D
NOTE:
Coating and marking is resistant to normal freon
degreasing. Consult factory for special requirements.
B (max)
C (max)
D (Lead Diameter)
IRC Type
A±0.032
LAS-1
LAS-3
AS-1/4
AS-1/2
AS-1
AS-1C
AS-2
AS-2B
AS-2C
AS-3
AS-5
AS-7
AS-10
0.348 (8.84)
0.491 (12.47)
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)
0.110 (2.80)
0.149 (3.80)
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)
0.407 (10.34)
0.550 (13.99)
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)
0.020 (0.53)
0.032 (0.81)
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)
*Leads 60/40 are solder plated. AS-1C leads are copper. All others are 40% conductivity copper sheathed steel.
WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860
·
Boone, North Carolina 28607-1860
·
Tel: 704-264-8861
·
Fax: 704-264-8865
1
ISO-9001
Registered
POWER DERATING:
200
AS-1/4, 1/2, 1
LAS-1, AS-2B
TEMPERATURE RISE @ 25°C:
275
250
Hot Spot Temperature (°C)
AS-7, 10
AS-3,
AS-5
AS-1, AS-2
AS-2
Percent of 125°C Power Rating
175
AS-3
, LAS-3
150
125
100
75
0
25
200
LAS-3,
AS-2A, 2C
AS-2A, 2C
AS-2
AS-5, 10
AS-2B
AS-2B
LAS-1
150
100
AS-1/2
AS-7, 25
AS-1/4
50
25
75
125
175
225
275
0
40
80
120
160
200
Ambient Temperature (°C)
Percent of 25°C Power Rating
TEMPERATURE RISE @ 125°C:
275
AS-7, 10
SELECTED PULSE-HANDLING
CAPABILITY @ 125°C:
14
AS-2A
250
Hot Spot Temperature (°C)
12
AS-3, AS-5
AS-5
AS2A, AS2C
AS-3, 2A, 2C
LAS-1
AS-1/2
Energy (watts-second)
AS-2
AS-2B
LAS-3
10
8
AS-2
AS-3
200
AS-1/4
AS-2B
6
AS-2C
4
AS-1
,LAS-1
LAS-3
150
125
2
0
20
40
60
80
100
0
0.1
AS-1/2
AS-1/4
0.2
0.5
1
2
5
10
Percent of 125°C Power Rating
Resistance (ohms)
ENVIRONMENTAL TESTING:
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 27Ω 0.25%
Ω
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%
WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860
·
Boone, North Carolina 28607-1860
·
Tel: 704-264-8861
·
Fax: 704-264-8865
2
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