IRC TT AS-2 Semi-precision power wirewound resistor Datasheet

Semi-Precision Power
Wirewound Resistor
Alloy resistance wirewound
to specific parameters
including TCR’s from
AS Series
• 1/4 watt to 10 watts
AlphaDigital
Marking
All welded
cap and lead
• 0.1 ohm to 175K ohms
• ±5%, ±3%, ±1%, ±.5% tolerance
• Resistance wire TCR ±20 ppm/°C
Silicone
conformal coating
• RoHS-compliant version available
Heat conducting
ceramic
Electrical Data
IRC Type
Similar
MIL-R-26
Style
Power Rating 275°C
Max. Hot Spot
Commercial Range
(ohms)
Non-Inductive
Range
(ohms)
Available Resistance
(ohms)
125°C
25°C
Min.
Max.
Min.
Max.
0.5%, 1%
3%, 5%
0.5
1
0.1
1.0K
*
*
1-1K
0.1-1K
0.5
1
0.1
6.0K
*
*
1-6K
0.1-6K
1
2
0.1
7.5K
0.1
3.8K
1-7.5K
0.1-7.5K
1
2
.05
2K
*
*
1-2K
.05-2K
2
3
0.1
20K
0.5
10K
1-20K
0.1-20K
AS-2B
3
4
0.1
24K
0.5
12K
1-24K
0.1-24K
AS-2C
2
3
0.1
18K
0.2
7.5K
1-18K
0.1-18K
AS-3
3
5
0.1
30K
0.5
15K
1-30K
0.1-30K
5
7
0.1
60K
0.8
30K
1-60K
0.1-60K
7
9
0.1
90K
1.0
45K
1-90K
0.1-90K
10
14
0.1
175K
3.0
50K
1-175K
0.1-175K
AS-1/4
RW81
AS-1/2
AS-1
RW70U
AS-1C
AS-2
AS-5
RW79U
RW74U/
AS-7
AS-10
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.
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.
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
AS Series Issue August 2008 Sheet 1 of 3
Semi-Precision Power
Wirewound Resistor
Physical Data
NOTE:
• Coating and marking is resistant to normal degreasing.
Consult factory for special requirements.
B
1.50 MIN.
(38.1)
A
D
Please note lead length dimension
change on the following two items only:
AS-2B 1.3 min.
AS-2C 1.3 min.
IRC Type
C
A±0.032
B (max)
C (max)
D (Lead Diameter)
AS-1/4
0.250 (6.4)
0.094 (2.4)
0.312 (7.9)
0.020 (0.5)
AS-1/2
0.312 (7.9)
0.094 (2.4)
0.375 (9.5)
0.020 (0.5)
AS-1
0.367 (9.3)
0.125 (3.2)
0.429 (10.9)
0.020 (0.5) 0.025 (0.64)
AS-1C
0.256 (6.5)
0.115 (2.9)
0.303 (7.7)
0.025 (0.64) 0.032 (0.8)
AS-2
0.480 (12.2)
0.250 (6.3)
0.600 (15.2)
0.032 (0.8)
AS-2B
0.540 (13.7)
0.219 (5.6)
0.663 (16.6)
0.032 (0.8)
AS-2C
0.489 (11.0)
0.157 (4.0)
0.594 (15.1)
0.032 (0.8)
AS-3
0.687 (17.5)
0.282 (7.2)
0.812 (20.6)
0.040 (1.0)
AS-5
0.875 (22.2)
0.344 (8.8)
0.980 (24.9)
0.040 (1.0)
AS-7
1.250 (31.8)
0.344 (8.8)
1.375 (35.0)
0.040 (1.0)
AS-10
1.812 (46.0)
0.385 (9.8)
1.937 (49.2)
0.040 (1.0)
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
AS Series Issue August 2008 Sheet 2 of 3
Semi-Precision Power
Wirewound Resistor
Max ∆R
Test Condition
Load Life 1000 hours
1.0%
Moisture Resistance
1.0%
Temperature Cycle
0.5%
Short Time Overload
0.5%
Low Temperature Operation
0.5%
Solder Heat
0.25%
Shock
0.5%
Vibration
0.5%
Selected Pulse-Handling
Capability @ 125°C
Energy (watts-second)
200
AS- 1/4, 1/2, 1, 1C
175
AS- 3, 2
150
AS- 2C
AS- 5, 10
125
AS- 2B
100
AS- 7
75
0
25
75
125
175
225
275
Ambient Temperature (°C)
Ordering Data
Sample Part No.
AS - 3
27R0
F
LF
IRC Type
14
AS
AS- 2A
12
10
Power Derating Curve
Percent of 125°C Power Rating
Environmental Testing at 25°C
Power
3 = 3 watts
(See specification chart for other power ratings)
AS- 3
AS- 2
Resistance Value
(100 ohms and greater - First 3 significant digits plus 4th digit multiplier)
Example: 100 ohms = 1000, 1000 ohms = 1001, 150,000 ohms = 1503
(Less than 100 ohms - "R" is used to designate decimal)
Example: 51 ohms = 51R0, 1 ohm = 1R00, 0.25 ohms = R250
8
AS- 2B
6
AS- 2C
Tolerance
4
J = ±5%; H = ±3%; F = ±1%; D = ±0.5%
AS- 1
2
0
0.1
AS- 1/2
Lead Free Construction
AS- 1/4
0.2
0.5
1
2
5
10
Resistance (ohms)
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
AS Series Issue August 2008 Sheet 3 of 3
Similar pages