VM / MVM / LVM / WVM Series — Ceramic Housed Vertical
Mount
Features
• Flameproof inorganic construction
• High temperature potting compound
• VM - Wirewound on fiberglass element
• RoHS compliant / lead-free
• MVM - Metal oxide element for higher values
• LVM - Low resistance wire or ribbon element
• WVM - Precision wirewound element
• See CB series for Performance Characteristics
Electrical Specifications
Type / Code
Power Rating
(Watts)
@ 70°C
2W
3W
5W
7W
10W
3W
5W
2W
3W
5W
7W
10W
2W
3W
5W
7W
10W
Ohmic Range and Tolerance
0.5%
–
–
–
–
–
–
–
–
–
–
–
–
0.1Ω – 2KΩ
0.1Ω – 5KΩ
0.1Ω – 5KΩ
0.1Ω – 8KΩ
0.1Ω – 8KΩ
1%
–
–
–
–
–
–
–
0.01Ω – 0.1Ω
0.01Ω – 0.1Ω
0.01Ω – 0.1Ω
0.02Ω – 0.15Ω
0.02Ω – 0.15Ω
0.1Ω – 2KΩ
0.1Ω – 5KΩ
0.1Ω – 5KΩ
0.1Ω – 8KΩ
0.1Ω – 8KΩ
5%
0.1Ω – 100Ω
0.1Ω – 125Ω
0.1Ω – 150Ω
0.2Ω – 300Ω
0.2Ω – 300Ω
100Ω – 1KΩ
100Ω – 1KΩ
0.01Ω – 0.1Ω
0.01Ω – 0.1Ω
0.01Ω – 0.1Ω
0.02Ω – 0.15Ω
0.02Ω – 0.15Ω
0.1Ω – 2KΩ
0.1Ω – 5KΩ
0.1Ω – 5KΩ
0.1Ω – 8KΩ
0.1Ω – 8KΩ
10%
0.1Ω – 100Ω
0.1Ω – 125Ω
0.1Ω – 150Ω
0.2Ω – 300Ω
0.2Ω – 300Ω
100Ω – 100KΩ
100Ω – 100KΩ
0.01Ω – 0.1Ω
0.01Ω – 0.1Ω
0.01Ω – 0.1Ω
0.02Ω – 0.15Ω
0.02Ω – 0.15Ω
–
–
–
–
–
VM 2
VM 3
VM 5
VM 7
VM 10
MVM 3
MVM 5
LVM 2
LVM 3
LVM 5
LVM 7
LVM 10
WVM 2
WVM 3
WVM 5
WVM 7
WVM 10
Maximum Working Voltage is limited by
√PR
Resistance Temperature Coefficient Standard:
VM series: ±800ppm below 1Ω
&
±300ppm at 1Ω and above
MVM series: ±200ppm
LVM series: ±50 to ±400ppm depending on value
WVM series: ±90ppm below 1Ω, ±50ppm from 1Ω to 10Ω & ±20ppm above 10Ω.
How to Order
VM
SEI Type
3
Code
2.2
Nominal Value
5%
Tolerance
B
Packaging
Type
VM
MVM
LVM
WVM
NWVM
Description
Standard WW
Metal Oxide
Ribbon Element
Precision WW
Non-inductive WW
Code
2
3
5
7
10
Tolerance
0.5%
1%
5%
10%
SEI Type
VM 2, VM 3,
VM 5, MVM
VM 7, VM 10
LVM, WVM
Pkg Qty Description Code
750
250
500
Bulk
B
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
75
email: marketing@seielect.com
Rev 08/07
VM / MVM / LVM / WVM Series — Ceramic Housed Vertical
Mount
Mechanical Specifications
Type / Code
Tolerance
VM 2
VM 3
VM 5
VM 7
VM 10
A
±0.039
±1.0
0.280
7.1
0.380
9.7
0.380
9.7
0.380
9.7
0.480
12.2
B
±0.059
±1.5
0.820
20.8
0.975
24.8
0.990
25.1
1.520
38.6
1.375
34.9
C
±0.039
±1.0
0.435
11.0
0.475
12.1
0.520
13.2
0.520
13.2
0.635
16.1
D
±0.059
±1.5
0.200
5.1
0.200
5.1
0.200
5.1
0.200
5.1
0.300
7.6
Units
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
*VM lead length 0.175 ± 0.032 and lead diameter 0.032
*MVM lead length 0.175 ± 0.032 and lead diameter 0.032
*LVM lead length 0.175 ± 0.032 and LVM 2 to LVM 5 lead diameter 0.032 & LVM 7 to LVM 10 lead diameter 0.036
*WVM lead length 0.175 ± 0.032 and WVM 2 to WVM 5 lead diameter 0.032 & WVM 7 to WVM 10 lead diameter 0.036
VM
VM
LVM
MVM
WVM
*VM 2 lead diameter is 0.032 and MVM, LVM & WVM lead diameter is 0.036
**Series VM, MVM, LVM, & WVM have the same dimensions.
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
76
email: marketing@seielect.com
Rev 08/07
嵌入式系统
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