WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Features:
•
•
•
•
•
•
•
•
•
•
•
•
•
WWS offers miniature size at higher power rating
High performance for low cost
High power to size ratio
High temperature silicone coating
MWW/NMWW – completely molded construction with welded terminations
Complete welded terminations
Tinned copper leads
Available in non-inductive styles
Tighter tolerances may be available for non-inductive styles.
Contact Stackpole with requirements.
Higher operating temperatures available
“B” packaging code denotes bulk packaging - contact Stackpole for package quantities
WW/NWW/WWS meet UL94V-0
RoHS compliant and halogen-free
Electrical Specifications – WW, WWS, MWW
Power Rating
Power Rating
@ 125ºC
@ 70ºC
WW12
-
0.4 W
0.5 W
WW1
-
1W
1.1 W
WW1A
RW-70
1W
1.3 W
WW2
RW-69
1.5 W
2.1 W
WWS2
-
2.5 W
2.6 W
WW2A
-
2.5 W
2.6 W
WW3
RW-79
3W
3.2 W
WWS3
-
3W
3.2 W
WW3A
-
3W
3.4 W
WW4
-
4W
4.3 W
WWS4
RW-79
4W
4.3 W
WW5
RW-67, RW-74
5W
5.1 W
WWS5
-
5W
5.1 W
WW7
-
6.5 W
7.2 W
WWS7
RW-67, RW-74
6.5 W
7.2 W
WW7B
-
7W
7.7 W
WW10
RW-78
10 W
11 W
WWS10
-
10 W
11 W
MWW1
RW-70
1W
1.3 W
MWW3
RW-79
3W
3.2 W
MWW5
RW-67, RW-74
5W
5.5 W
MWW10
RW-68, RW-74
10 W
11 W
(*) Other resistance values available - contact factory for details.
Type / Code
MIL-R-26 Ref.
TCR (ppm/ºC)
Ohmic Range (Ω) and Tolerance
0.1%
0.5%
1%
5%
5 - 2K
3 - 2K
5 - 2K
2 - 3K
1 - 5K
1 - 10K
0.5 - 10K
1 - 10K
0.5 - 10K
1 - 10K
0.5 - 10K
1 - 22K
0.5 - 22K
3 - 10K
1 - 10K
1 - 30K
0.5 - 30K
1 - 40K
0.5 - 40K
1 - 22K
0.5 - 22K
1 - 50K
0.5 - 50K
1 - 40K
0.5 - 40K
1 - 70K
0.5 - 70K
1 - 50K
0.5 - 50K
1 - 70K
0.5 - 70K
1 - 100K
0.5 - 100K
1 - 70K
0.5 - 70K
5 - 2K
3 - 20K
2 - 40K
2 - 80K
(*)
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ± 50ppm/ºC
>10Ω = ±20ppm/ºC
Electrical Specifications – Non-Inductive Styles
Power Rating
Power Rating
@ 125ºC
@ 70ºC
NWW12
-
0.4 W
0.5 W
NWW1
-
1W
1.1 W
NWW1A
RW-70
1W
1.3 W
NWW2
RW-69
1.5 W
2.1 W
NWWS2
-
2.5 W
2.6 W
NWW2A
-
2.5 W
2.6 W
NWW3
RW-79
3W
3.2 W
NWWS3
-
3W
3.2 W
NWW3A
-
3W
3.4 W
NWW4
-
4W
4.3 W
NWWS4
RW-79
4W
4.3 W
NWW5
RW-67, RW-74
5W
5.1 W
NWWS5
-
5W
5.1 W
NWW7
-
6.5 W
7.2 W
NWWS7
RW-67, RW-74
6.5 W
7.2 W
NWW7B
-
7W
7.7 W
(*) Other resistance values available - contact factory for details.
Type / Code
MIL-R-26 Ref.
TCR (ppm/ºC)
Ohmic Range (Ω) and Tolerance
(*)
1% and 5%
10 - 1K
2 - 1.5K
1 - 2.5K
1 - 5K
1 - 5K
1 - 5K
1 - 11K
3 - 5K
1 - 15K
1 - 20K
1 - 11K
1 - 25K
1 - 20K
1 - 35K
1 - 25K
1 - 35K
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ± 50ppm/ºC
>10Ω = ±20ppm/ºC
Rev Date: 05/03/2019
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Electrical Specifications – Non-Inductive Styles (cont.)
Power Rating
Power Rating
@ 125ºC
@ 70ºC
NWW10
RW-78
10 W
11 W
NWWS10
-
10 W
11 W
NMWW1
RW-70
1W
1.3 W
NMWW3
RW-79
3W
3.2 W
NMWW5
RW-67, RW-74
5W
5.5 W
NMWW10 RW-68, RW-74
10 W
11 W
(*) Other resistance values available - contact factory for details.
Type / Code
MIL-R-26 Ref.
TCR (ppm/ºC)
Ohmic Range (Ω) and Tolerance
(*)
1% and 5%
1 - 50K
1 - 35K
5 - 1K
3 - 10K
2 - 20K
2 - 40K
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ± 50ppm/ºC
>10Ω = ±20ppm/ºC
Mechanical Specifications
Type / Code
WW12 / NWW12
A
B
C
D
(Bulk)
(1)
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
1.500 typ.
38.10 typ.
Unit
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
0.312 ± 0.062
0.110 ± 0.031
0.025 ± 0.002
7.92 ± 1.57
2.79 ± 0.79
0.64 ± 0.05
0.375 ± 0.062
0.110 ± 0.031
0.025 ± 0.002
WW1, WWS2 / NWW1, NWWS2
9.53 ± 1.57
2.79 ± 0.79
0.64 ± 0.05
0.420 ± 0.062
0.110 ± 0.031
0.025 ± 0.002
WW1A / NWW1A
10.67 ± 1.57
2.79 ± 0.79
0.64 ± 0.05
0.370 ± 0.062
0.156 ± 0.031
0.032 ± 0.002
WW2, WWS3 / NWW2, NWWS3
9.40 ± 1.57
3.96 ± 0.79
0.81 ± 0.05
0.550 ± 0.062
0.156 ± 0.031
0.032 ± 0.002
WW2A / NWW2A
13.97 ± 1.57
3.96 ± 0.79
0.81 ± 0.05
0.560 ± 0.062
0.187 ± 0.031
0.032 ± 0.002
WW3, WWS4 / NWW3, NWWS4
14.22 ± 1.57
4.75 ± 0.79
0.81 ± 0.05
0.500 ± 0.062
0.218 ± 0.031
0.032 ± 0.002
WW3A / NWW3A
12.70 ± 1.57
5.54 ± 0.79
0.81 ± 0.05
0.700 ± 0.062
0.270 ± 0.031
0.036 ± 0.002
WW4, WWS5 / NWW4, NWWS5
17.78 ± 1.57
6.86 ± 0.79
0.91 ± 0.05
0.875 ± 0.062
0.312 ± 0.031
0.036 ± 0.002
WW5, WWS7 / NWW5, NWWS7
22.23 ± 1.57
7.92 ± 0.79
0.91 ± 0.05
1.000 ± 0.062
0.312 ± 0.031
0.036 ± 0.002
WW7 / NWW7
25.40 ± 1.57
7.92 ± 0.79
0.91 ± 0.05
1.200 ± 0.062
0.312 ± 0.031
0.036 ± 0.002
WW7B, WWS10 / NWW7B, NWWS10
30.48 ± 1.57
7.92 ± 0.79
0.91 ± 0.05
1.780 ± 0.062
0.375 ± 0.031
0.040 ± 0.002
WW10 / NWW10
(2)
45.21 ± 1.57
9.53 ± 0.79
1.02 ± 0.05
0.385 ± 0.062
0.135 ± 0.031
0.032 ± 0.002
MWW1 / NMWW1
9.78 ± 1.57
3.43 ± 0.79
0.81 ± 0.05
0.560 ± 0.062
0.205 ± 0.031
0.032 ± 0.002
MWW3 / NMWW3
14.22 ± 1.57
5.21 ± 0.79
0.81 ± 0.05
0.925 ± 0.062
0.330 ± 0.031
0.036 ± 0.002
MWW5 / NMWW5
23.50 ± 1.57
8.38 ± 0.79
0.91 ± 0.05
1.965 ± 0.062
0.480 ± 0.031
0.040 ± 0.002
MWW10 / NMWW10
49.91 ± 1.57
12.19 ± 0.79
1.02 ± 0.05
(1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product.
(2) Lead diameter (C) available in 0.036" / 0.91mm.
Rev Date: 05/03/2019
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Power Derating Curve:
100
-55 ºC
70 °C
125 °C
Percent Rated Power (%)
80
60
40
20
350 ºC
0
-60
0
50
100
150
200
250
300
350
400
Ambient Temperature (ºC)
Performance Characteristics
Test
Moisture Resistance
Load Life
Temperature Cycling
Short Time Overload
Dielectric Withstand Voltage
Test Condition
1000 hours, 95% R.H., 40ºC
1000 hours,
cycled power 1.5 hours ON, 0.5 hours OFF, 25ºC
5 cycles, -55ºC to 200ºC
5 times rated power for 5 seconds
Resistor leads are grounded and high potential probe is
touched to the resistor body
Test Specification
1% max
1%
0.5%
1%
500V for (N)WW12, 1, 1A and 2S.
1000V for all others
Operating Temperature Range: -55ºC to +350ºC
Lead-Tape Specifications
Type / Code
WW12
WW1, WWS2
NWW1, NWWS2
WW1A, NWW1A
Dimension "E":
A max
.(1)
2.880
73.15
2.880
73.15
2.880
73.15
B max
11.000
279.40
11.000
279.40
11.000
279.40
0.197
5.00
0.197
5.00
0.197
5.00
C
±
±
±
±
±
±
0.020
0.50
0.020
0.50
0.020
0.50
D
(2)
2.063
52.40
2.063
52.40
2.063
52.40
±
±
±
±
±
±
0.079
2.00
0.079
2.00
0.079
2.00
Tape
0.250
6.35
0.250
6.35
0.250
6.35
Unit
inches
mm
inches
mm
inches
mm
This is a non-critical dimension that does not have a tolerance in the standard.
Range of diameters is from 0.547 inches (13.90 mm) to 1.500 inches (38.10 mm).
(1) Reference value only. The "A" dimension shall be governed by the overall length of the taped component.
The distance between flanges shall be 0.059 inches (1.50 mm) to 0.315 (8.00 mm) greater than the overall component.
(2) The given dimension "D" expresses the standard width spacing. A 26mm narrow spacing is available as option "N" packaging code.
Rev Date: 05/03/2019
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Lead-Tape Specifications (cont.)
Type / Code
WW2, WWS3
NWW2, NWWS3
WW2A, NWW2A
WW3, WWS4
NWW3, NWWS4
WW3A, NWW3A
WW4, WWS5
NWW4, NWWS5
WW5, WWS7
NWW5, NWWS7
WW7, NWW7
WW7B, WWS10
NWW7B, NWWS10
WW10, NWW10
MWW1, NMWW1
MWW3, NMWW3
MWW5, NMWW5
MWW10, NMWW10
A max
.(1)
B max
11.000
279.40
11.000
279.40
11.000
279.40
11.000
279.40
11.000
279.40
11.000
279.40
11.000
279.40
11.000
279.40
11.000
279.40
13.504
343.00
13.504
343.00
13.504
343.00
13.504
343.00
0.197
5.00
0.197
5.00
0.197
5.00
0.394
10.00
0.394
10.00
0.394
10.00
0.394
10.00
0.394
10.00
0.394
10.00
0.197
5.00
0.394
10.00
0.394
10.00
0.394
10.00
C
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
0.020
0.50
2.063
52.40
2.063
52.40
2.500
63.50
2.874
73.00
2.500
63.50
2.874
73.00
2.874
73.00
2.874
73.00
2.874
73.00
2.063
52.40
2.063
52.40
2.874
73.00
4.310
109.47
D
(2)
Tape
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.079
2.00
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
0.250
6.35
Unit
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
2.880
73.15
2.880
73.15
2.880
73.15
3.740
95.00
2.500
63.50
3.740
95.00
5.100
129.54
5.100
129.54
5.100
129.54
3.311
84.10
3.484
88.50
3.850
97.80
4.764
121.00
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
This is a non-critical dimension that does not have a tolerance in the standard.
Range of diameters is from 0.547 inches (13.90 mm) to 1.500 inches (38.10 mm).
(1) Reference value only. The "A" dimension shall be governed by the overall length of the taped component.
The distance between flanges shall be 0.059 inches (1.50 mm) to 0.315 (8.00 mm) greater than the overall component.
(2) The given dimension "D" expresses the standard width spacing. A 26mm narrow spacing is available as option "N" packaging code.
Dimension "E":
Rev Date: 05/03/2019
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Energy Handling Capability:
(Typical performance - for reference only.)
RoHS Compliance
Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to meet the various
regulatory requirements now prevalent, such as the European Union’s directive regarding “Restrictions on Hazardous Substances”
(RoHS 3). As part of this ongoing program, we periodically update this document with the status regarding the availability of our
compliant components. All our standard part numbers are compliant to EU Directive 2011/65/EU of the European Parliament as
amended by Directive (EU) 2015/863/EU as regards the list of restricted substances.
RoHS Compliance Status
Standard
Product
Series
MWW
NWW
Description
Package /
Termination
Type
Axial
Axial
Standard
Series
RoHS
Compliant
YES
YES
Lead-Free Termination
Composition
Lead-Free
Mfg. Effective Date
(Std Product Series)
Jan-06
Jan-06
Lead-Free
Effective Date
Code
(YY/WW)
06/01
06/01
WW
General Purpose and Precision Leaded
Wirewound Resistor - Molded
General Purpose and Precision Leaded
Wirewound Resistor - Conformal Coated -
Non-Inductive
General Purpose and Precision Leaded
Wirewound Resistor - Conformal Coated -
Non-Inductive
100% Matte Sn
100% Matte Sn
Axial
YES
100% Matte Sn
Jan-06
06/01
Rev Date: 05/03/2019
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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