Document Number: 50026 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 23-Mar-09 83
RT25
Vishay Sfernice
Wirewound Rheostat/Potentiometer
FEATURES
•25 W at 25 °C
•CCTU 05-03B (PA1)
•Vitreous - RT style
•Compliant to RoHS directive 2002/95/EC
DIMENSIONS in millimeters
MECHANICAL SPECIFICATIONS
Mechanical Protection Vitreous
Mechanical Travel 300° ± 5°
Operating Torque 1 Ncm to 10 Ncm
End Stop Torque 50 Ncm
Unit Weight 80 g
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55 °C + 320 °C
Climatic Category CCTU 454
CEI 55/200/56
LOCKING DEVICE
This is supplied as an option.
The available spindle length is according to the panel
thickness.
Order reference: DBA6
ADAPTATION BOARD
This enables 2 point mounting instead of bush mounting. The
adaptation board is supplied as an option with 2 mounting
screws. Consequently, the available spindle length is
reduced by 9.5 mm.
ADAPTATION BOARD PANEL CUT OUT DETAILS
PANEL CUT OUT DETAILS
RT25-PA1
7.6
Ø 10.5
2 holes Ø 5
23.5 23.5
Ø 4.5
12.5 ± 0.5
Ø 10.5
23
60°
Ø 2.2
38 25 4
M10 x 0.75
- 0
Ø 6 - 0.05
12
9 ± 1
22 ± 2
28 AS
MOUNTING SIDE
ELECTRICAL SPECIFICATIONS
Ohmic Range 1 Ω to 4.7 kΩ
Tolerance Standard ± 10 %
Power Rating 25 W at 25 °C
Variation Law Standard Linear
On request Sectorial winding
Dielectric Strength 1000 VRMS
Insulation Resistance 103 MΩ (500 VCC)
1 ± 0.2
13
2 tightening screws
spanner n° 14
max. panel thickness
6.5
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 50026
84 Revision: 23-Mar-09
RT25
Vishay Sfernice Wirewound Rheostat/Potentiometer
For any special requirement on request: spindle flats, etc.
Please supply detailed drawing.
MARKING
SFERNICE trademark, series, style, power rating in watts, ohmic value (in Ω or kΩ), tolerance (in %), maximum current in A,
manufacturing date
PARTICULAR CHARACTERISTICS
NOMINAL
RESISTANCE
Ω
MAX. SERVICE
VOLTAGE
V
MAX. CURRENT
THROUGH WIPER
mA
1 5 5000
1.5 6.12 4080
2.2 7.42 3370
3.3 9.08 2750
4.7 10.8 2300
6.8 13 1920
10 15.8 1580
15 19.4 1290
22 23.5 1070
33 28.7 870
47 34.3 730
68 41.2 605
100 50 500
150 61.2 408
220 74.2 337
330 90.8 275
470 108 230
680 130 192
1K 158 158
1.5K 194 129
2.2K 235 107
3.3K 287 87
4.7K 343 73
SPINDLES
Ø
mm
DISTANCE TO MOUNTING
PLATE mm
SCREW DRIVER
SLOT
CODE
6
22
With ASF
25 Without
AM
With AMF
50 Without
AL
6
22 Without
AS
DIAL CG57 (OPTION)
56
47
4 holes Ø 3.5
Ø 12
5
6
7
8
9
10
0
1
2
3
4
56
47
COMMAND SHAFT 29JF (OPTION)
18
Ø 7
Ø 43
21
ORDERING INFORMATION
RT
025 ASF 2201 K B XXX
MODEL STYLE SPINDLE OHMIC VALUE TOLERANCE PACKAGING SPECIAL DESIGN
GLOBAL PART NUMBER INFORMATION
GLOBAL
MODEL SIZE LOCKING
DEVICE (OPT.)
WINDING
(OPT.)
COMMAND
SHAFT OHMIC VALUE TOLERANCE PACKAGING SPECIAL
RT 025 D BXXX
or
BXXXX
As applicable
xxx(x) =
Internal
number
AS = Standard
(Diam: 6 mm)
AM
AMF
AL
ASF
The three first digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
2002 = 20 kΩ
4700 = 470 Ω
10R0 = 10 Ω
0R01 = 0.01 Ω
J = 5 %
K = 10 %
B = Bulk
BO10
No standard
packaging:
N = Bulk,
qty open
As applicable
Ex = DXxx
25AS10R KT 0R 0B
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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All product specifications and data are subject to change without notice.
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(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
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Product names and markings noted herein may be trademarks of their respective owners.
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Authorized Distributor
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