WW / MWW Series — General Purpose and Precision Wirewound
Features
• High performance for low cost
• Excellent stability in operation
• 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
Std. Resistance Range* (ohms)
Power Rating (Watts)
Type / Code
MIL-R-26 Ref.
Dielectric Strength
@ 125°C (U)
WW H
WW 1
WW 1A
WW 2
WW 2A
WW 3
WW 3A
WW 4
WW 5
WW 7
WW 7B
WW 10
MWW 1
MWW 3
MWW 5
MWW 10
–
–
RW-70
RW-69
–
RW-79
–
–
RW-67, RW-74
–
–
RW-78
RW-70
RW-79
RW-67, RW-74
RW-68, RW-74
500
500
500
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
0.4W
1.0W
1.0W
1.5W
2.5W
3.0W
3.0W
4.0W
5.0W
6.5W
7.0W
10W
1.0W
3.0W
5.0W
10.0W
@ 25°C (V)
0.6W
1.2W
1.5W
2.5W
3.0W
3.7W
4.0W
5.0W
6.0W
8.5W
9.0W
13W
1.5W
3.75W
6.5W
13.0W
0.1%, 0.5%, 1% & 5%
Std
0.1Ω – 2KΩ
0.1Ω – 3KΩ
0.1Ω – 7KΩ
0.1Ω – 10KΩ
0.1Ω – 15KΩ
0.1Ω – 22KΩ
0.1Ω – 30KΩ
0.1Ω – 40KΩ
0.1Ω – 50KΩ
0.1Ω – 70KΩ
0.1Ω – 100KΩ
0.1Ω – 150KΩ
0.1Ω – 2KΩ
0.1Ω – 20KΩ
0.1Ω – 40KΩ
0.1Ω – 150KΩ
Non-Inductive
0.1Ω – 1KΩ
0.1Ω – 1.5KΩ
0.1Ω – 3.5KΩ
0.1Ω – 5KΩ
0.1Ω – 7.5KΩ
0.1Ω – 11KΩ
0.1Ω – 15KΩ
0.1Ω – 20KΩ
0.1Ω – 25KΩ
0.1Ω – 35KΩ
0.1Ω – 50KΩ
0.1Ω – 75KΩ
–
–
–
–
*Standard TC as follows: ±90ppm below 1Ω, ±50ppm from 1 - 10Ω,
&
±20ppm above 10Ω.
How to Order
WW
SEI Type
1
Code
10K
Nominal Resistance
1%
Tolerance
R
Packaging
Type
WW
MWW
Description
Standard
Molded
1
Code
4
5
7
7B
10
H
1A
2
2A
3
3A
Tolerance
0.1%
0.5%
1.0%
5.0%
SEI Type
WW H, WW 1, WW 1A, MWW 1
WW 2, WW 2A, WW 3, WW 4, MWW 3
WW 3A
WW 5, WW 7, WW 7B, WW 10, MWW 5
WW 10, MWW 10
Pkg Qty Description Code
2,500
2,000
750
500
250
11" Flange
R
NWW Non-Inductive
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
55
email: marketing@seielect.com
Rev 05/07
WW / MWW Series — General Purpose and Precision Wirewound
Mechanical Specifications
Type / Code
Tolerance
WW H
WW 1
WW 1A
WW 2
WW 2A
WW 3
WW 3A
WW 4
WW 5
WW 7
WW 7B
WW 10
A
± 0.062/±1.6
0.312
7.9
0.375
9.5
0.420
10.7
0.370
9.4
0.550
14.0
0.560
14.2
0.500
12.7
0.700
17.8
0.875
22.2
1.000
25.4
1.200
30.5
1.780
45.2
B
± 0.031/±0.8
0.110
2.8
0.110
2.8
0.110
2.8
0.156
4.0
0.156
4.0
0.187
4.8
0.218
5.5
0.270
6.9
0.312
7.9
0.312
7.9
0.312
7.9
0.375
9.5
C
± 0.002/±0.05
0.0245
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
0.036*
0.91*
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
* Available in 0.040
Mechanical Specifications
Type / Code
Tolerance
MWW 1
MWW 3
MWW 5
MWW 10
A
± 0.015/±0.4
0.385
9.8
0.560
14.2
0.925
23.5
1.965
49.9
B
± 0.015/±0.4
0.135
3.4
0.205
5.2
0.330
8.4
0.480
12.2
C
± 0.002/±0.05
0.032
0.81
0.032
0.81
0.036
0.91
0.040
1.02
Units
inches
mm
inches
mm
inches
mm
inches
mm
Performance Characteristics
Test
Moisture Resistance
Load Life
Temperature Cycling
Short Time Overload
Results
1% max.
1%
0.5%
1%
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
56
email: marketing@seielect.com
Rev 05/07
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