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
D (Lead Diameter)
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)
D
C
A
1.50 min.
(38.1)
B
SEMI-PRECISION
POWER WIREWOUND
AS SERIES
• •
• •
•
1/2 watt to 10 w atts
••
••
•
±5%, ±3%, ±1%, ±.5% tolerance
••
••
•
0.1 ohm to 175K ohms
• •
• •
•
Resistance wire TCR ±20 ppm/°C
••
••
•
AS-SM f or surface mount capabilities. See Surface Mount section of this catalog for details.
Manufactured in Barbados
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 reque st.
AS DIMENSIONS (Inches and (mm)):
LAS-1 1.475
LAS-3 1.403 NOTE:
Coating and marking is resistant to normal freon
degreasing. Consult factory for special requirements.
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 275°C
Max. Hot Spot (watts) Commercial Range
(ohms) Non-Inductive Range
(ohms) Available Resistance
(ohms)
125°C
1
2
0.5
0.5
1
1
2
3
2
3
5
7
10
25°C
2
3
1
1
2
2
3
4
3
5
7
9
14
Min.
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
Max.
7.5K
18K
1.0K
6.0K
7.5K
2K
20K
24K
18K
30K
60K
90K
175K
Min.
0.1
0.2
*
*
0.1
*
0.5
0.5
0.2
0.5
0.8
1.0
3.0
Max.
3.8K
7.5K
*
*
3.8K
*
10K
12K
7.5K
15K
30K
45K
50K
0.5%, 1%
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
3%, 5%
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
IRC Type
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
A±0.032
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)
*Leads 60/40 are solder plated. AS-1C leads are copper. All others are 40% conductivity copper sheathed steel.
B (max)
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)
C (max)
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)
IRC Type
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
WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860 · Boone, North Carolina 28607-1860 · Tel: 704-264-8861 · Fax: 704-264-8865 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: HOW TO ORDER:
Sample Part No.:
AS-3 27ΩΩ
ΩΩ
Ω
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 ∆∆
∆∆
∆R
1.0%
1.0%
0.5%
0.5%
0.5%
0.25%
0.5%
0.5%
TEMPERATURE RISE @ 125°C:
Ambient Temperature (°C)
Percent of 125°C Power Rating
Percent of 25°C Power Rating
Hot Spot Temperature (°C)
TEMPERATURE RISE @ 25°C:
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 @ 125°C:
Resistance (ohms)
Energy (watts-second)
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 125°C Power Rating
Hot Spot Temperature (°C)
LAS-1
AS-3, AS-1, AS-2
AS-2B LAS-1
LAS-1, AS-2B
, LAS-3
LAS-3,
,LAS-1
AS2A, AS2C
AS-3, AS-5 LAS-3
LAS-3