WW/MWW Series
General Purpose and Precision Wirewound
Features:
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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 tested to MIL-R-39007
Complete welded terminations
Tinned copper leads
Available in non-inductive styles
High temperature silicone coating
RoHS compliant / lead-free
Electrical Specifications
Type / Code
WW H
WW 1 / WWS 2
WW 1A
WW 2 / WWS 3
WW 2A
WW 3 / WWS 4
WW 3A
WW 4 / WWS 5
WW 5 / WWS 7
WW 7
WW 7B / WWS 10
WW 10
MWW 1
MWW 3
MWW 5
MWW 10
MIL-R-26 Ref.
-
-
RW-70
RW-69
-
RW-79
-
-
RW-67, RW-74
-
-
RW-78
RW-70
RW-79
RW-67, RW-74
RW-68, RW-74
Dielectric
Power Rating (Watts)
Strength
(V)
@ 125ºC (U) @ 25ºC (V)
500V
500V
500V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
1,000V
0.4W
1W
1W
1.5W
2.5W
3W
3W
4W
5W
6.5W
7W
10W
1W
3W
5W
10W
0.6W
1.2W
1.5W
2.5W
3W
3.7W
4W
5W
6W
8.5W
9W
13W
1.5W
3.75W
6.5W
13W
>10Ω = ±20ppm/ºC
1Ω to 10Ω = ±50ppmºC
< 1Ω = ±90ppm/ºC
Resitance Temperature
Coefficient
Ohmic Range(Ω) and Tolerance(1)
0.1%, 0.5%, 1% & 5%
Standard
0.1 - 2K
0.1 - 3K
0.1 - 7K
0.1 - 10K
0.1 - 15K
0.1 - 22K
0.1 - 30K
0.1 - 40K
0.1 - 50K
0.1 - 70K
0.1 - 100K
0.1 - 150K
0.1 - 2K
0.1 - 20K
0.1 - 40K
0.1 - 150K
Non-Inductive
0.1 - 1K
0.1 - 1.5K
0.1 - 3.5K
0.1 - 5K
0.1 - 7.5K
0.1 - 11K
0.1 - 15K
0.1 - 20K
0.1 - 25K
0.1 - 35K
0.1 - 50K
0.1 - 75K
-
-
-
-
(1) Lesser of√PR or maximum working voltage
How to Order
SEI Type
Code
Nominal
Resistance
Tolerance
Packaging
WW
Type
WW
WWS
MWW
NWW
Description
Standard
Mini
Molded
Non-Inductive
1
1A
2
2A
3
3A
1
Code
4
5
7
7B
10
H
10K
1%
Tolerance
0.1%
0.5%
1%
5%
R
Types
WW H, WW 1, WWS2, WW 1A, MWW 1
WW 2, WWS3, WW 2A, WW 3, WWS4,
WW 4, WWS5, MWW 3
WW 3A
WW 5, WWS7, WW 7, WW 7B, WWS10,
WW 10, MWW 5
WW 10, MWW 10
Qty
2,500
2,000
5,000
500
250
11" Flange
R
Description
Code
Rev Date: 04/23/2010
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
79
www.seielect.com
marketing@seielect.com
WW/MWW Series
General Purpose and Precision Wirewound
Stackpole Electronics, Inc.
Resistive Product Solutions
Mechanical Specifications
Type / Code
WW H
WW 1 / WWS 2
WW 1 A
WW 2 / WWS 3
WW 2A
WW 3 / WWS 4
WW 3A
WW 4 / WWS 5
WW 5 / WWS 7
WW 7
WW 7B / WWS 10
WW 10
MWW 1
MWW 3
MWW 5
MWW 10
A
0.312 ± 0.062
7.9 ± 1.6
0.375 ± 0.062
9.5 ± 1.6
0.42 ± 0.062
10.7 ± 1.6
0.37 ± 0.062
9.4 ± 1.6
0.55 ± 0.062
14 ± 1.6
0.56 ± 0.062
14.2 ± 1.6
0.5 ± 0.062
12.7 ± 1.6
0.7 ± 0.062
17.8 ± 1.6
0.875 ± 0.062
22.2 ± 1.6
1 ± 0.062
25.4 ± 1.6
1.2 ± 0.062
30.5 ± 1.6
1.78 ± 0.062
45.2 ± 1.6
0.385 ± 0.062
9.8 ± 1.6
0.56 ± 0.062
14.2 ± 1.6
0.925 ± 0.062
23.5 ± 1.6
1.965 ± 0.062
49.9 ± 1.6
B
0.11 ± 0.031
2.8 ± 0.8
0.11 ± 0.031
2.8 ± 0.8
0.11 ± 0.031
2.8 ± 0.8
0.156 ± 0.031
4 ± 0.8
0.156 ± 0.031
4 ± 0.8
0.187 ± 0.031
4.8 ± 0.8
0.218 ± 0.031
5.5 ± 0.8
0.27 ± 0.031
6.9 ± 0.8
0.312 ± 0.031
7.9 ± 0.8
0.312 ± 0.031
7.9 ± 0.8
0.312 ± 0.031
7.9 ± 0.8
0.375 ± 0.031
9.5 ± 0.8
0.135 ± 0.031
3.4 ± 0.8
0.205 ± 0.031
5.2 ± 0.8
0.33 ± 0.031
8.4 ± 0.8
0.48 ± 0.031
12.2 ± 0.8
C
0.025 ± 0.002
0.64 ± 0.05
0.025 ± 0.002
0.64 ± 0.05
0.025 ± 0.002
0.64 ± 0.05
0.032 ± 0.002
0.81 ± 0.05
0.032 ± 0.002
0.81 ± 0.05
0.032 ± 0.002
0.81 ± 0.05
0.032 ± 0.002
0.81 ± 0.05
0.036 ± 0.002
0.91 ± 0.05
0.036 ± 0.002
0.91 ± 0.05
0.036 ± 0.002
0.91 ± 0.05
0.036 ± 0.002
0.91 ± 0.05
0.036 ± 0.002(1)
0.91 ± 0.05(1)
0.032 ± 0.002
0.81 ± 0.05
0.032 ± 0.002
0.81 ± 0.05
0.036 ± 0.002
0.91 ± 0.05
0.04 ± 0.002
1.02 ± 0.05
Units
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) Available in 0.04mm / 0.0016"
Performance Characteristics
Test
Moisture Resistance
Load Life
Temperature Cycling
Short Time Overload
Results
1% max
1%
0.5%
1%
Rev Date: 04/23/2010
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
80
www.seielect.com
marketing@seielect.com
WW/MWW Series
General Purpose and Precision Wirewound
Stackpole Electronics, Inc.
Resistive Product Solutions
Power Derating Curve:
120
Percent Rated Power (%)
100
80
60
40
20
Power Derating Curve
Char. V
Char. U
25
75
125
175
225
275
325
Ambient Temperature (ºC)
Characteristic "U" -55ºC to +275ºC
Characteristic "V" -55ºC to +350ºC
Rev Date: 04/23/2010
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
81
www.seielect.com
marketing@seielect.com
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