SM Series — Surface Mount - General Purpose/Precision Wirewound
Features
• High temperature molded encapsulation
• Flex termination for absorbing thermal expansion
• All welded construction
• Tinned copper terminals
• Available in non-inductive styles
Electrical Specifications
Type
Power Rating
(Watts)
@ 70°C
1.0 W
2.0 W
2.0 W
3.0 W
Maximium Working
Voltage
Resistance Temperature
Coefficient
±100 ppm/°C
± 20 ppm/°C
±100 ppm/°C
± 20 ppm/°C
±100 ppm/°C
±100 ppm/°C
± 20 ppm/°C
Ohmic Range and Tolerance
.1%, .5%, 1% & 5%
0.01Ω – 10Ω∗
10
Ω
–
1Κ
0.01Ω – 10Ω∗
10
Ω
– 1K
0.01Ω – 10Ω∗
0.01Ω – 10Ω∗
10
Ω
– 3K
SM1
SM2
SM2A
SM3
25.0
50.0
60.0
100.0
* Zero ohm available on all sizes
.
Mechanical Specifications
Type
Tolerance
SM1
SM2
SM2A
SM3
A
Body Length
±0.015
±0.4
.260
6.6
.410
10.4
.475
12.1
.629
16.0
B
Total Length
±0.032
±0.81
.280
7.1
.435
11.1
.500
12.7
.708
18.0
C
Body Height
±0.015
±0.4
.140
3.6
.180
4.6
.140
3.6
.256
6.5
D
Body Width
±0.015
±0.4
.150
3.8
.240
6.1
.305
7.8
.276
7.0
E
F
Termination Width Termination Length Units
±0.015
±0.4
.090
2.3
.100
2.5
.110
2.8
.110
2.8
±0.015
±0.4
.100
2.5
.115
2.9
.115
2.9
.115
2.9
inches
mm
inches
mm
inches
mm
inches
mm
How to Order
SM
SEI Type
2
Code
1K
Nominal Resistance
1%
Tolerance
R
Packaging
Code
1
2
2A
3
Size
2815
4424
5031
7128
Tolerance
.1%
.5%
1%
5%
Series
SM1
SM2
SM2A
SM3
Code
R
R
R
R
Description
13" Reel
13" Reel
13" Reel
13" Reel
Pkg Qty
1,500
800
1,200
750
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
37
email: marketing@seielect.com
SM Series — Surface Mount - General Purpose/Precision Wirewound
Performance Characteristics
Test
Load Life
Short Time Overload
Temperature Cycling
Moisture Resistance
Maximum Results
1% Maximum
.5% Maximum
.5% Maximum
1% Maximum
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
38
email: marketing@seielect.com