mi-Precision Power
Semi-Precision Power
ewound Resistor
Wirewound Resistor
AS / NAS Series
Alloy resistance wirewound
to specific parameters
including TCR’s from
All welded
Alloy resistance wirewound
cap and lead
to specific parameters
including TCR’s from
Semi-Precision Power
S Series
Wirewound Resistor
·
1/4 watt to 10 watts
All welded
cap and lead
·
0.1 ohm to 175K ohms
to 175K ohms
±3%, ±1%, ±.5% tolerance
·
±5%,
AS
Resistance wire TCR ±20 ppm/°C
·
1/4
/ NAS
to
Series
%, ±1%, ±.5% tolerance
•
watt 10 watts
·
0.1
±20
to
ppm/°C
version available
RoHS-compliant
nce wire TCR
ohm 175K ohms
•
•
Resistance wire TCR ±20 ppm/°C
•
RoHS-compliant version available
to 10 watts
Alpha-
Digital
Marking
•
±5%, ±3%, ±1%, ±.5%
ompliant version available
tolerance
Alpha-
Silicone
Digital
Marking
conformal
Silicone
Heat conducting
conformal coating
ceramic
coating
Heat conducting
ceramic
ical Data
Data
Electrical
Similar
IRC Type
MIL-R-26
Style
Style
125°C
AS-1/4
NAS-1/4
NAS-1/2
AS-1
NAS-1
AS-1C
NAS-1C
AS-2
NAS-2
AS-2B
NAS-2B
AS-2C
NAS-2C
RW79U
AS-3
NAS-3
AS-5
NAS-5
AS-7
NAS-7
AS-10
NAS-10
AS-1/2
RW81
Power Rating
Power Rating 275°C
275°C
/
AS / Commercial
AS Commercial
Similar
Max. Hot Spot
Range (ohms)
Max. Hot Spot
Range (ohms)
MIL-R-26
125°C
0.25
0.5
1
1
NAS / Non-Inductive
Available
Available
NAS / Non-Inductive
Resistance
Range (ohms)
(ohms)
pe
Range (ohms)
Max.
60
Resistan
(ohms)
25°C
1
1
2
2
3
2
3
25°C
1
1
2
2
Min.
0.1
0.1
0.1
Min.
0.1
0.1
0.1
.05
0.1
Max.
1.0K
Max.
Min.
0.2
0.5
0.2
10
Min.
0.2
0.5
0.2
Max.
0.5%, 1%
1-1K
0.5%, 1%
0.1-1K
0.1-6K
3%, 5%
3%, 5
RW81
4
0.25
RW70U
0.5
1.0K
6.0K
7.5K
6.0K
2K
60
3.8K
1K
10K
60
1-6K
1-7.5K
60
1-2K
1-1K
1-6K
0.1-1
2
0.1-7.5K
.05-2K
0.1-6
RW70U
1
RW79U
7.5K
20K
0.1
0.1
0.1
3.8K
1-20K
12K
7.5K
15K
1-7.5K
0.1-20K
0.1-7.
3
0.25
0.1
0.2
0.1
0.1
C
1
2
3
2
RW78U
2
3
4
3
5
7
9
14
4
3
5
7
9
14
.05
0.1
0.1
0.1
0.1
0.1
0.1
0.1
2K
24K
20K
30K
18K
10
1K
1-24K
10K
1-18K
1-2K
0.1-24K
0.1-18K
0.1-30K
0.1-60K
.05-2
0.25
0.1
1-20K
1-24K
0.1-20
1-30K
B
RW74U
5
7
10
0.1
0.1
0.1
24K
60K
90K
18K
175K
30K
45K
50K
12K
1-60K
0.1-24
C
0.2
0.2
0.2
1-90K
7.5K
1-175K
0.1-90K
1-18K
0.1-175K
0.1-18
3
30K
60K
90K
0.1
0.1
0.2
0.2
15K
30K
45K
50K
1-30K
1-60K
1-90K
0.1-30
RW74U
5
7
0.1-60
0.1-90
0
RW78U
General Note
IRC reserves the right to make changes in product specification without notice or liability.
General Note
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
10
175K
1-175K
A subsidiary of
TT electronics plc
0.1-17
TT electronics reserves the right to make changes in product specification without notice or liability.
All information
Technologies Division
own
South Staples
considered
Christi Texas
time of
Wire and Film
is subject to TT electronics’
• 4222
data and is
Street • Corpus
accurate at
78411 USA
going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
AS / NAS Series Issue February 2010 Sheet 1 of 3
© TT electronics plc
01. 12
Semi-Precision Power
Wirewound Resistor
Semi-Precision Power
Wirewound Resistor
AS / NAS Series
Physical Data
1.50 MIN.
(38.1)
B
A
D
C
Please note lead length dimension
change on the following two items only:
AS / NAS -2B 1.3 min.
AS / NAS -2C 1.3 min.
NOTE:
• Coating and marking is resistant to normal degreasing.
Consult factory for special requirements.
IRC Type
AS-1/4
NAS-1/4
AS-1/2
NAS-1/2
AS-1
NAS-1
AS-1C
NAS-1C
AS-2
NAS-2
AS-2B
NAS-2B
AS-2C
NAS-2C
AS-3
NAS-3
AS-5
NAS-5
AS-7
NAS-7
AS-10
NAS-10
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)
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 / NAS Series Issue February 2010 Sheet 2 of 3
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
01. 12
Semi-Precision Power
Wirewound Resistor
AS / NAS Series
Semi-Precision Power
Wirewound Resistor
Power Derating Curve
Percent of 125°C Power Rating
200
175
150
125
AS- 2B
AS- 1/4, 1/2, 1, 1C
AS- 3, 2
AS- 2C
AS- 5, 10
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%
100
75
0
25
75
AS- 7
125
175
225
275
Ambient Temperature (°C)
Selected Pulse-Handling
Capability @ 125°C
14
Energy (watts-second)
12
10
8
AS- 2B
AS- 2
AS- 3
AS- 2A
6
AS- 2C
4
AS- 1
2
0
0.1
AS- 1/2
AS- 1/4
0.2
0.5
1
2
5
10
Resistance (ohms)
Ordering Data
Sample Part No.
IRC Type
Power
Non-inductive styles will be indicated as NAS
AS
3
27R0
F
LF
XXX
3 = 3 watts (See specification chart for other power ratings)
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
Tolerance
J = ±5%; H = ±3%; F = ±1%; D = ±0.5%
Lead Free Construction
RoHS compliance status: products carrying the LF designator will
provide 100% Matte Sn plated leads. Omission of the LF designator
explicitly specifies standard Sn/Pb plated lead wires.
Specification Number (Optional)
Custom design identifier for non-standard products
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 / NAS Series Issue February 2010 Sheet 3 of 3
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
01. 12
