RSO
www.vishay.com
Vishay Sfernice
Wirewound Resistor, Industrial High Power,
Enamelled Corrugated Tape, Tubular
FEATURES
• 160 W to 1 kW at 25 °C
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
The remarkable dissipation power of this series is the result of an original winding method using corrugated edge-wound tape,
thus forming a very active radiator. The enameling follows the contour of the resistive element and provides effective insulation
and support for the winding.
The tubular core is of special ceramic, capable of withstanding high thermal shock and overload of short duration.
NF F 16101, 10/1988 and 16102, 04/1992: Not applicable (our parts are made of metallic and refractory materials).
DIMENSIONS
in millimeters
SCREWED STAINLESS STEEL 304 l “AN” TYPE 1
A
Z
F
ØC
ØC
ØC
R
ØB
26
P
ØQ
G
H
15
L
E
D
ØB
M
J
K
SCREWED STAINLESS STEEL 304 l “CS” TYPE 1
A
SCREWED STAINLESS STEEL 304 l “CS” TYPE 2
A
ØC
23
3
ØB
58
G
H
15
L
J
K
M
Revision: 16-Mar-16
Document Number: 50018
1
For technical questions, contact:
sferfixedresistors@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
RSO
www.vishay.com
Vishay Sfernice
F
+ 0.5
+0
9
9
13
18
18
R
28.5 ± 1
28.5 ± 1
31 ± 1
45 ± 1.5
51 ± 1.5
DIMENSIONS
in millimeters
RSO
SERIES
25 x 138
25 x 168
30 x 250
40 x 370
50 x 373
RSO
SERIES
25 x 138
25 x 168
30 x 250
40 x 370
50 x 373
CONNECTIONS
AN type 1 CS type 1
AN type 1 CS type 1
AN type 1 CS type 1
AN type 2 CS type 2
AN type 2 CS type 2
CONNECTIONS
AN type 1 CS type 1
AN type 1 CS type 1
AN type 1 CS type 1
AN type 2 CS type 2
AN type 2 CS type 2
A±2
138
168
250
370
373
K
27 ± 1
27 ± 1
30 ± 1
45 ± 1.5
45 ± 1.5
ØB
MAX.
39
39
44
54.5
65
L + 0.5
6.5
6.5
9
9
9
ØC
MIN.
12.6
12.6
17.4
22.3
27.1
M ± 0.5
24
24
25
30
30
D
MAX.
54
54
62
85.5
97
P
117 ± 2
147 ± 2
227 ± 2.5
332 ± 3
332 ± 3
E
33.5 ± 1
33.5 ± 1
36 ± 1
57 ± 1.5
63 ± 1.5
Q
5.7
5.7
5.7
9.2
9.2
G
-4/+0
199
229
317
432
432
Z
6
6
5
10
11.5
H
-4/+0
169
199
287
405
405
J
50 ± 1.5
50 ± 1.5
60 ± 1.5
73.8
79
AVERAGE UNIT
WEIGHT IN g
AN
160
190
350
960
1375
CS
205
235
400
1040
1455
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RSO 25 x 138
RSO 25 x 168
RSO 30 x 250
RSO 40 x 370
RSO 50 x 373
SIZE
25138
25168
30250
40370
50373
RESISTANCE RANGE
0.068 to 12
0.10 to 18
0.22 to 33
0.33 to 56
0.39 to 68
RATED POWER
P
25 °C
W
160
200
350
700
1000
TOLERANCE
±%
10
10
10
10
10
MECHANICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Connections
Average Unit Weight
Enamel
Ni-Cr wire
AN CS supporting collars
160 g to 1455 g
TECHNICAL SPECIFICATIONS
Resistance Range
Standard Resistance Tolerance
Power Rating
0.068
to 68
(E12 preferred series)
R
n
1
± 5 %
R
n
< 1
± 10 %
160 W to 1 kW at 25 °C
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
Climatic Category
-55 °C, +450 °C
-55 °C / +200 °C / 56 days
PERFORMANCE
TESTS
Short Time Overload
Thermal Shock
Climatic Sequence
Load Life
CONDITIONS
10
P
r
during 5 s
Load at
P
r
followed by cold
temp. exposure at -55 °C / 15 s
Phase A: +200°
Phase C: -55°
Phase D: 5 cycles
90' / 30' cycle
1000 h at
P
r
25 °C
REQUIREMENTS
2 % or 0.05
2 % or 0.05
3 % or 0.05
5%
TYPICAL VALUES AND DRIFTS
1%
1%
1%
2%
RECOMMENDATIONS FOR USE
OVERLOAD:
The RSO resistors are capable of withstanding overloads of about 10
P
r
for a maximum period of 5 s; they can resist
momentarily even greater overloads.
Particular requirements should be submitted to Vishay Sfernice.
Revision: 16-Mar-16
Document Number: 50018
2
For technical questions, contact:
sferfixedresistors@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
RSO
www.vishay.com
POWER RATING
125
Vishay Sfernice
TEMPERATURE RISE
HOT SPOT TEMPERATURE IN °C
100
450
400
RATED POWER IN %
75
300
50
200
25
0
0
100
200
300
400
450
100
0
10
100
AMBIENT TEMPERATURE IN °C
RATED POWER IN W
MARKING
Vishay Sfernice trademark, model, style, nominal resistance
(in
),
tolerance (in %), manufacturing date.
PACKAGING
Box: Fixed quantity depending on size and collars
ORDERING INFORMATION
RSO
MODEL
25 x 168
STYLE
XXX
SPECIAL
DESIGN
Method N°
Optional
CS
CONNECTIONS
U82
OHMIC VALUE
Custom items are
subject to
extra-charge and
min. order.
Please see price list.
± 10 %
TOLERANCE
B02NA
PACKAGING
e
LEAD
(Pb)-FREE
SAP PART NUMBERING GUIDELINES
RSO
MODEL
25168
STYLE
C
CONNECTIONS
R820
OHMIC VALUE
K
TOLERANCE
N
PACKAGING
RELATED DOCUMENTS
APPLICATION NOTES
Packaging Information
Accessories
www.vishay.com/doc?50033
www.vishay.com/doc?50021
Revision: 16-Mar-16
Document Number: 50018
3
For technical questions, contact:
sferfixedresistors@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
O
RS
25 x
13
O
8
25
x1
68
RS
O
30
x2
RS
50
RS
O
O
50
4
x
37
0 x
37
3
0
RS
1000
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
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document
or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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