RSO
Vishay Sfernice
Fixed Wirewound Enamelled Corrugated Tape Resistors
Very High Dissipation
FEATURES
•
160 W to 1 kW at 25 °C
•
Compliant to RoHS directive 2002/95/EC
AN Collars
CS Collars
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 enamelling 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
P
ØQ
E
D
ØB
26
G
H
15
L
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
Document Number: 50018
Revision: 09-Jul-09
For technical questions, contact:
sfer@vishay.com
www.vishay.com
115
RSO
Vishay Sfernice
Fixed Wirewound Enamelled Corrugated Tape Resistors
Very High Dissipation
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
AN type 1
AN type 1
AN type 2
AN type 2
CS type 1
CS type 1
CS type 1
CS 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
Ø
C
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
F
+ 0.5
+0
9
9
13
18
18
R
28.5 ± 1
28.5 ± 1
31 ± 1
45 ± 1.5
51 ± 1.5
G
- 4/+ 0
199
229
317
432
432
Z
6
6
5
10
11.5
H
- 4/+ 0
J
CONNECTIONS
AN type 1
AN type 1
AN type 1
AN type 2
AN type 2
CS type 1
CS type 1
CS type 1
CS type 2
CS type 2
169
50 ± 1.5
199
50 ± 1.5
287
60 ± 1.5
405
73.8
405
79
AVERAGE UNIT
WEIGHT IN g
AN
160
190
350
960
1375
CS
205
235
400
1040
1455
MECHANICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Connections
Average Unit Weight
Enamel
Ni-Cr wire
AN CS supporting collars
160 to 1455 g
ELECTRICAL SPECIFICATIONS
Resistance Range
Standard Resistance Tolerance
Power Rating
Temperature Coefficient
0.068
Ω
to 68
Ω
(E12 preferred series)
R
n
≥
1
Ω
± 5 %
R
n
< 1
Ω
± 10 %
160 W to 1 kW at 25 °C
180 ppm/°C (typical)
ENVIRONMENTAL SPECIFICATIONS
Temperature Limits
Climatic Category
- 55 °C + 450 °C
- 55 °C/+ 200 °C/56 days
PERFORMANCE
TESTS
Short Time Overload
Thermal Shock
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
Ω
2 % or 0.05
Ω
3 % or 0.05
Ω
5%
TYPICAL VALUES AND DRIFTS
1%
1%
Climatic Sequence
Load Life
1%
2%
SPECIAL FEATURES
RSO STYLE
Power Rating at 25 °C
Resistance Ohmic Range
(E12 Series)
25 x 138
160 W
0.068
Ω
12
Ω
25 x 168
200 W
0.10
Ω
18
Ω
30 x 250
350 W
0.22
Ω
33
Ω
40 x 370
700 W
0.33
Ω
56
Ω
50 x 373
1000 W
0.39
Ω
68
Ω
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.
www.vishay.com
116
For technical questions, contact:
sfer@vishay.com
Document Number: 50018
Revision: 09-Jul-09
RSO
Fixed Wirewound Enamelled Corrugated Tape Resistors
Very High Dissipation
POWER RATING
125
Vishay Sfernice
TEMPERATURE RISE
HOT SPOT TEMPERATURE IN °C
450
400
RS
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
100
RATED POWER IN %
75
300
50
200
25
0
0
100
200
300
400
450
100
0
10
100
1000
AMBIENT TEMPERATURE IN °C
RATED POWER IN W
MARKING
Vishay Sfernice trademark, model, style, nominal resistance
(in
Ω),
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
Document Number: 50018
Revision: 09-Jul-09
For technical questions, contact:
sfer@vishay.com
www.vishay.com
117
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
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 herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
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.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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1
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