WW/MWW/NWW Series
General Purpose and Precision Wirewound Resistor
Features:
•
•
•
•
•
•
•
•
•
•
•
Stackpole Electronics, Inc.
Resistive Product Solutions
WWS offers miniature size at higher power rating
High performance for low cost
High power to size ratio
MWW – completely molded construction with welded terminations
Complete welded terminations
Tinned copper leads
Available in non-inductive styles
High temperature silicone coating
RoHS compliant
Higher operating temperatures available
Bulk packaging available - contact Stackpole for package quantities
Electrical Specifications
Power Rating Power Rating
Type / Code MIL-R-26 Ref.
TCR (ppm/ºC)
(W)
(W)
@ 125ºC
@ 70ºC
0.5 W
WW12
-
0.4 W
WW1
-
1W
1.1 W
WW1A
RW-70
1W
1.3 W
WW2
RW-69
1.5 W
2.1 W
-
2.5 W
2.6 W
WW2S
WW2A
-
2.5 W
2.6 W
3.2 W
WW3
RW-79
3W
WWS3
-
3W
3.2 W
WW3A
-
3W
3.4 W
WW4
-
4W
4.3 W
4.3 W
WWS4
RW-79
4W
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
NWW12
-
0.4 W
0.5 W
1.1 W
NWW1
-
1W
NWW1A
RW-70
1W
1.3 W
< 1Ω = ±90ppm/ºC
NWW2
RW-69
1.5 W
2.1 W
1Ω to 10Ω = ± 50ppm/ºC
NWWS2
-
2.5 W
2.6 W
>10Ω = ±20ppm/ºC
2.5 W
NWW2A
-
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
NWW10
RW-78
10 W
11 W
NWWS10
-
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
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.
Ohmic Range (Ω) and Tolerance (*)
0.1%
5 - 2K
2 - 3K
1 - 5K
1 - 10K
1 - 10K
1 - 10K
1 - 22K
3 - 10K
1 - 30K
1 - 40K
1 - 22K
1 - 50K
1 - 40K
1 - 70K
1 - 50K
1 - 70K
1 - 100K
1 - 70K
10 - 1K
4 - 1.5K
2 - 2.5K
2 - 5K
2 - 5K
2 - 5K
2 - 11K
5 - 5K
2 - 15K
2 - 20K
2 - 11K
2 - 25K
2 - 20K
2 - 35K
2 - 25K
2 - 35K
2 - 50K
2 - 35K
5 - 2K
3 - 20K
2 - 40K
2 - 80K
10 - 1K
5 - 10K
3 - 20K
3 - 40K
0.5%
3 - 2K
2 - 3K
1 - 5K
0.5 - 10K
0.5 - 10K
0.5 - 10K
0.5 - 22K
1 - 10K
0.5 - 30K
0.5 - 40K
0.5 - 22K
0.5 - 50K
0.5 - 40K
0.5 - 70K
0.5 - 50K
0.5 - 70K
0.5 - 100K
0.5 - 70K
10 - 1K
4 - 1.5K
2 - 2.5K
2 - 5K
2 - 5K
2 - 5K
2 - 11K
5 - 5K
2 - 15K
2 - 20K
2 - 11K
2 - 25K
2 - 20K
2 - 35K
2 - 25K
2 - 35K
2 - 50K
2 - 35K
5 - 2K
3 - 20K
2 - 40K
2 - 80K
10 - 1K
5 - 10K
3 - 20K
3 - 40K
1%
3 - 2K
2 - 3K
1 - 5K
0.5 - 10K
0.5 - 10K
0.5 - 10K
0.5 - 22K
1 - 10K
0.5 - 30K
0.5 - 40K
0.5 - 22K
0.5 - 50K
0.5 - 40K
0.5 - 70K
0.5 - 50K
0.5 - 70K
0.5 - 100K
0.5 - 70K
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
1 - 50K
1 - 35K
5 - 2K
3 - 20K
2 - 40K
2 - 80K
5 - 1K
3 - 10K
2 - 20K
2 - 40K
5%
5 - 2K
2 - 3K
1 - 5K
0.5 - 10K
0.5 - 10K
0.5 - 10K
0.5 - 22K
1 - 10K
0.5 - 30K
0.5 - 40K
0.5 - 22K
0.5 - 50K
0.5 - 40K
0.5 - 70K
0.5 - 50K
0.5 - 70K
0.5 - 100K
0.5 - 70K
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
1 - 50K
1 - 35K
5 - 2K
3 - 20K
2 - 40K
2 - 80K
5 - 1K
3 - 10K
2 - 20K
2 - 40K
Rev Date: 08/07/2014
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
1
www.seielect.com
marketing@seielect.com
WW/MWW/NWW Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
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
Result
1% max
1%
0.5%
1%
500V for (N)WW12, 1, 1A and 2S.
1000V for all others
Operating Temperature Range: -55ºC to +350ºC
Mechanical Specifications
Type / Code
WW12 / NWW12
WW1, WWS2 / NWW1, NWWS2
WW1A / NWW1A
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
0.312
7.92
0.375
9.53
0.420
10.67
0.370
9.40
0.550
13.97
0.560
14.22
0.500
12.70
0.700
17.78
0.875
22.23
1.000
25.40
1.200
30.48
1.780
45.21
0.385
9.78
0.560
14.22
0.925
23.50
1.965
49.91
A
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.062
1.57
0.110
2.79
0.110
2.79
0.110
2.79
0.156
3.96
0.156
3.96
0.187
4.75
0.218
5.54
0.270
6.86
0.312
7.92
0.312
7.92
0.312
7.92
0.375
9.53
0.135
3.43
0.205
5.21
0.330
8.38
0.480
12.19
B
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.025
0.64
0.025
0.64
0.025
0.64
0.032
0.81
0.032
0.81
0.032
0.81
0.032
0.81
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.040
1.02
0.032
0.81
0.032
0.81
0.036
0.91
0.040
1.02
C
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
0.002 (2)
0.05 (2)
0.002
0.05
0.002
0.05
0.002
0.05
0.002
0.05
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
(1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product
(2) Available in 0.036" / 0.91mm
Rev Date: 08/07/2014
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
2
www.seielect.com
marketing@seielect.com
WW/MWW/NWW Series
General Purpose and Precision Wirewound Resistor
Power Derating Curve:
100
-55ºC
100ºC
Stackpole Electronics, Inc.
Resistive Product Solutions
Percent Rated Power (%)
80
60
40
20
350ºC
0
-60
0
50
100
150
200
250
300
350
400
Ambient Temperature (ºC)
How to Order
1
2
3
4
5
6
7
8
9
W
W
1
F
T
1
K
0
0
Product Series
WW
Standard
WWS
Mini
MWW
Molded
NWW Non-Inductive
Mini
NWWS
Non-Inductive
Type/Code
WW12 /
WW1 /
WW1A /
WW2 /
WWS2 /
WW2A /
WW3 /
WWS3 /
WW3A /
WW4 /
WWS4 /
WW5 /
WWS5 /
WW7 /
WWS7 /
WW7B /
WW10 /
WWS10 /
MWW1 /
MWW3 /
MWW5 /
MWW10 /
NWW12
NWW1
NWW1A
NWW2
NWWS2
NWW2A
NWW3
NWWS3
NWW3A
NWW4
NWWS4
NWW5
NWWS5
NWW7
NWWS7
NWW7B
NWW10
NWWS10
NMWW1
NMWW3
NMWW5
NMWW10
Power Rating
@ 125ºC @ 70ºC
0.5 W
0.4W
1W
1.1 W
1.3 W
1W
1.5W
2.1 W
2.5W
2.6 W
2.5W
2.6 W
3W
3.2 W
3W
3.2 W
3.4 W
3W
4W
4.3 W
4W
4.3 W
5W
5.1 W
5W
5.1 W
6.5W
7.2 W
6.5W
7.2 W
7W
7.7 W
10W
11.0 W
10W
11.0 W
1W
1.3 W
3W
3.2 W
5W
5.5 W
10W
11.0 W
Tolerance
Code Tol
B
0.1%
D
0.5%
F
1%
J
5%
Code
Description
T
11" Tape
and Reel
Packaging
Quantity
Size
WW12 / NWW12
WW1 / NWW1
2,500
WWS2 / NWWS2
WW1A / NWW1A
MWW1 / NMWW1
WW2 / NWW2
WWS3 / NWWS3
WW2A / NWW2A
2,000
WW3 / NWW3
WWS4 / NWWS4
MWW3 / NMWW3
WW3A / NWW3A
WW4 / NWW4
WWS5 / NWWS5
WW5 / NWW5
500
WWS7 / NWWS7
WW7 / NWW7
WW7B / NWW7B
WWS10 / NWWS10
MWW5 / NMWW5
WW10 / NWW10
250
MWW10 / NMWW10
Resistance Value
Four characters
with the multiplier
used as the
decimal holder.
0.5 ohm = R500
1 ohm = 1R00
10 Kohm = 10K0
Rev Date: 08/07/2014
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
3
www.seielect.com
marketing@seielect.com
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