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International Rectifier Electronic Components Datasheet



AS568

Semi-Precision Power Wirewound Resistor



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AS568 pdf
SEMI-PRECISION POWER
WIREWOUND RESISTOR
ISO-9001
Registered
AS SERIES
1/4 watt to 10 watts
±5%, ±3%, ±1%, ±.5% tolerance
0.1 ohm to 175K ohms
Resistance wire TCR ±20 ppm/°C
Alloy resistance wire wound
to specific parameters
including TCR's from ±20 to
+5500 ppm/°C
Alpha - Digital
Marking
All welded cap
and lead
assembly
Silicone conformal
coating
Heat conducting
ceramic substrate
SPECIFICATIONS:
Power Rating 275°C
Equivalent
MIL-R-26
Max. Hot Spot (watts)
IRC Type Style
125°C
25°C
AS-1/4
RW81
0.5
1
AS-1/2
0.5 1
AS-1
AS-1C
RW70U
1
1
2
2
AS-2
RW-69V/
RW79U
2
3
AS-2B
AS-2C
AS-3
AS-5
RW74U/
RW67V
3
2
3
5
4
3
5
7
AS-7
AS-10
RW68V/
RW78U
7
10
9
14
Commercial Range
(ohms)
Min.
0.1
0.1
0.1
.05
0.1
Max.
1.0K
6.0K
7.5K
2K
20K
0.1 24K
0.1 18K
0.1 30K
0.1 60K
0.1 90K
0.1 175K
Non-Inductive Range
(ohms)
Min.
*
*
0.1
*
0.5
Max.
*
*
3.8K
*
10K
Available Resistance
(ohms)
0.5%, 1%
1-1K
1-6K
1-7.5K
1-2K
1-20K
3%, 5%
0.1-1K
0.1-6K
0.1-7.5K
.05-2K
0.1-20K
0.5
12K
1-24K
0.1-24K
0.2
7.5K
1-18K
0.1-18K
0.5
15K
1-30K
0.1-30K
0.8
30K
1-60K
0.1-60K
1.0
45K
1-90K
0.1-90K
3.0 50K 1-175K 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.
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
1.50 min.
(38.1)
B
A
D
C
* Typical inductance of AS-1C <5 ohms is < 1µH.
Lower values available upon request.
NOTE:
Coating and marking is resistant to normal freon degreasing.
Consult factory for special requirements.
AS marking available in Alpha Numeric or Colorbanding -
identification available.
IRC Type
A±0.032
B (max)
C (max)
AS-1/4
0.250 (6.4)
0.094 (2.4)
0.312 (7.9)
AS-1/2
0.312 (7.9)
0.094 (2.4)
0.375 (9.5)
AS-1
0.367 (9.3)
0.125 (3.2)
0.429 (10.9)
AS-1C
0.256 (6.5)
0.115 (2.9)
0.303 (7.7)
AS-2
0.480 (12.2)
0.250 (6.3)
0.600 (15.2)
AS-2B
0.540 (13.7)
0.219 (5.6)
0.663 (16.6)
AS-2C
0.489 (11.0)
0.157 (4.0)
0.594 (15.1)
AS-3
0.687 (17.5)
0.282 (7.2)
0.812 (20.6)
AS-5
0.875 (22.2)
0.344 (8.8)
0.980 (24.9)
AS-7
1.250 (31.8)
0.344 (8.8)
1.375 (35.0)
AS-10
1.812 (46.0)
0.385 (9.8)
1.937 (49.2)
*Leads 60/40 are solder plated. AS-1C leads are copper. All others are 40% conductivity copper sheathed steel.
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)
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
1



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AS568 pdf
POWER DERATING:
200
175
AS-1/4, 1/2, 1
AS-3
150
125
AS-5, 10
AS-2A, 2C
AS-2
100
AASS-7-7, ,2B25
75
0
25 75 125 175 225
Ambient Temperature (°C)
275
TEMPERATURE RISE @ 125°C:
275
AS-7, 10
250
AS-3, AASS--55
AASS-23A, ,2AAS, 22CC
AS-2
AS-2B
200
AS-1/2
AS-1/4
150
12500
240 4800 16200 18600
Percent of 125°C Power Rating
12000
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%
ISO-9001
Registered
TEMPERATURE RISE @ 25°C:
275
250
AS-7, 10
AS-3,AS-5
ASA-1S, A-2S-2
200
AS-2A, 2C
ASA-2SB-2B
150
AS-1/2
100
50
25
0
AS-1/4
40 80 120 160
Percent of 25°C Power Rating
200
SELECTED PULSE-HANDLING
CAPABILITY @ 125°C:
14
12
AS-2
10
AS-3
AS-2A
8
6
4
2 AS-1/2
AS-1/4
00.1 0.2
AS-2B
AS-1
AS-2C
0.5 1
2
Resistance (ohms)
5
10
HOW TO ORDER:
Sample Part No.:
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%
AS-3 27R0 0.25%
2 WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com



Part Number AS568
Description Semi-Precision Power Wirewound Resistor
Maker International Resistive - International Resistive
Total Page 2 Pages
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