FSOT
www.vishay.com
Vishay Huntington
Wirewound Resistor, Industrial Power,
Silicone Coated, Standard Oval
FEATURES
• High temperature silicone coating
• Mounting accommodations ideally suited to
high density packaging
• Available in non-inductive style (special “NI”)
with Ayrton-Perry winding
• Self-stacking hardware
vertical placement
for
horizontal
or
• Mounting hardware functions as a heat sink allowing
greater heat dissipation and less derating of stacked units
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
FSOT10
FSOT10-NI
FSOT15
FSOT15-NI
FSOT20
FSOT20-NI
FSOT30
FSOT30-NI
FSOT40
FSOT40-NI
FSOT55
FSOT55-NI
FSOT65 / FSOT70
(1)
FSOT65-NI / FSOT70-NI
(1)
FSOT75 / FSOT95
(1)
FSOT75-NI / FSOT95-NI
(1)
HISTORICAL
MODEL
FSOT-10
FSOT-10-NI
FSOT-15
FSOT-15-NI
FSOT-20
FSOT-20-NI
FSOT-30
FSOT-30-NI
FSOT-40
FSOT-40-NI
FSOT-55
FSOT-55-NI
FSOT-65
FSOT-65-NI
FSOT-75
FSOT-75-NI
POWER RATING
P
25 °C
W
10
15
20
30
40
55
70
95
RESISTANCE
RANGE
Ω
±5%
1.0 to 15K
1.0 to 1.8K
1.0 to 26K
1.0 to 3.6K
1.0 to 71K
1.0 to 9.8K
1.0 to 11K
1.0 to 1.2K
1.0 to 26K
1.0 to 3K
1.0 to 54K
1.0 to 6.8K
1.0 to 77K
1.0 to 9.4K
1.0 to 99.9K
1.0 to 12.4K
RESISTANCE
RANGE
Ω
± 10 %
0.10 to 15K
1.0 to 1.8K
0.10 to 26K
1.0 to 3.6K
0.10 to 71K
1.0 to 9.8K
0.10 to 11K
1.0 to 1.2K
0.10 to 26K
1.0 to 3K
0.10 to 54K
1.0 to 6.8K
0.10 to 77K
1.0 to 9.4K
0.10 to 99.9K
1.0 to 12.4K
WEIGHT
(typical)
g
0.41
0.47
0.74
20.14
30.07
51.25
60.48
76.51
Note
(1)
The preferred models are the FSOT70 and FSOT95. FSOT65 and FSOT75 are being shown as they have historically been used for these two
wattages
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Short Time Overload
Dielectric Withstanding Voltage
Maximum Working Voltage
Operating Temperature Range
UNIT
ppm/°C
-
V
AC
V
°C
FSOT RESISTOR CHARACTERISTICS
± 260 for 20
Ω
and above, ± 400 for 1
Ω
to 20
Ω,
special TC’s available
10 x rated power for 5 s
1000, from terminal to mounting hardware
(P x
R)
1/2
-55 to +350
Revision: 03-May-17
Document Number: 31847
1
For technical questions, contact:
ww2dresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
FSOT
www.vishay.com
Vishay Huntington
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: FSOT5509E25R00JE
(visit
www.vishay.net
SAP parts manual for all options)
F
S
O
T
5
5
0
9
E
2
5
R
0
0
J
E
SPECIAL
(up to 2 digits)
(dash number)
from
1
to
99
as
applicable
CT
= center tap
NI
= non-inductive
GLOBAL MODEL
(6 digits)
(see Standard
Electrical
Specifications
Global Model
column for
options)
TERMINAL
DESIGNATION
(2 digits)
09
11
TERMINAL
FINISH
(1 digit)
E
= lead
(Pb)-free
VALUE
(5 digits)
R
= decimal
K
= thousand
1R500
= 1.5
Ω
1K500
= 1.5 kΩ
TOLERANCE
(1 digit)
J
=±5%
K
= ± 10 %
PACKAGING CODE
(1 digit)
E
= lead (Pb)-free
cell and bulk pack
Historical Part Number example: FSOT-55-25-5 %
FSOT-20
HISTORICAL MODEL
25
Ω
RESISTANCE VALUE
5%
TOLERANCE
SPECIAL
DIMENSIONS
in inches [millimeters]
FSOT10 / FSOT15 / FSOT20
Distance
center to center
FSOT30 / FSOT40 / FSOT55 / FSOT65 / FSOT70 / FSOT75 / FSOT95
Distance
center to center
MODEL
A
± 0.063
[1.59]
0.750
[19.05]
1.000
[25.40]
2.062
[52.37]
1.250
[31.75]
2.000
[50.8]
3.500
[88.90]
4.750
[120.65]
6.000
[152.4]
B
± 0.063
[1.59]
1.312
[33.32]
1.562
[39.67]
2.625
[66.68]
2.500
[63.50]
3.250
[82.55]
4.750
[120.65]
6.000
[152.4]
7.250
[184.15]
C
± 0.031
[0.79]
1.000
[25.40]
1.250
[31.75]
2.312
[58.72]
2.000
[50.8]
2.750
[69.85]
4.250
[107.95]
5.500
[139.7]
6.750
[171.45]
DISTANCE
CENTER TO
CENTER
(REF.)
0.531
[13.49]
0.781
[19.84]
1.843
[46.81]
0.906
[23.01]
1.656
[42.06]
3.156
[80.16]
4.406
[111.91]
5.656
[143.66]
TERMINAL DESIGNATION
STANDARD
11
11
11
09
09
09
09
09
For Quick Connect terminal
option, use FSOTXX...16/17
(www.vishay.com/doc?30337)
OPTIONAL
(QUICK CONNECT)
FSOT10
FSOT15
FSOT20
FSOT30
FSOT40
FSOT55
FSOT65 / FSOT70
(1)
FSOT75 / FSOT95
(1)
Note
(1)
The preferred models are the FSOT70 and FSOT95. FSOT65 and FSOT75 are being shown as they have historically been used for these two
wattages
Revision: 03-May-17
Document Number: 31847
2
For technical questions, contact:
ww2dresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
FSOT
www.vishay.com
Vishay Huntington
TERMINAL DIMENSIONS
D
E
Style
09, 11
F
G
For Quick Connect terminal option, use FSOTXX...16/17 (www.vishay.com/doc?30337)
DIMENSIONS
D
E
(HOLE DIAMETER)
F
G
STYLE 09
0.188 [4.76]
0.106 [2.69]
0.438 [11.13]
0.020 [0.51]
STYLE 11
0.125 [3.18]
0.081 [2.10]
0.235 [5.97]
0.020 [0.51]
DERATING
RATED POWER IN %
120
100
80
60
40
20
0
- 65 - 50
0
25
50
150
250
350
AMBIENT TEMPERATURE IN °C
MATERIAL SPECIFICATIONS
Element:
copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core:
ceramic, steatite
Coating:
special high temperature silicone
Standard Terminals:
tinned alloy 42
Terminal Bands:
alloy 42
Part Marking:
HEI, model, wattage, value, tolerance, date
code
NON-INDUCTIVE
Models of equivalent physical and electrical specifications
are available with non-inductive (Ayrton-Perry) winding.
They are identified by adding the letters “NI” to the end of
the part number in the special section. For non-inductive
models the maximum resistance values are lower, see
Standard Electrical Specifications table.
Revision: 03-May-17
Document Number: 31847
3
For technical questions, contact:
ww2dresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
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Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
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© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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