RT25
Vishay Sfernice
Wirewound Rheostat/Potentiometer
FEATURES
• 25 Watt at 25°C
• CCTU 05-03B (PA1)
• Vitreous - RT style
DIMENSIONS
in millimeters
ADAPTATION BOARD
PANEL CUT OUT DETAILS
Ø 10.5
2 holes Ø 5
7.6
RT25-PA1
38
25
4
-0
6 - 0, 05
23.5
23.5
PANEL CUT OUT DETAILS
M10 x 0, 75
Ø 4.5
12.5 ± 0.5
23
2,2
9 +1
12
60
28
22
+
2
AS
Ø 10.5
MOUNTING SIDE
MECHANICAL SPECIFICATIONS
Mechanical Protection
Mechanical Travel
Operating Torque
End Stop Torque
Unit Weight
Vitreous
300° ± 5°
1 to 10 Ncm
50 Ncm
80 g
ELECTRICAL SPECIFICATIONS
Ohmic Range
Tolerance Standard
Power Rating
Variation Law
Dielectric Strength
Insulation Resistance
Standard
On request
1Ω to 4.7kΩ
± 10%
25 W at 25°C
linear
sectorial winding
1000VRMS
10
3
MΩ(500Vcc)
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
Climatic Category
– 55°C + 320°C
CCTU 454
CEI 55/200/56
Document Number: 50026
Revision 22-Jun-05
For technical questions, contact sfer@vishay.com
www.vishay.com
83
RT25
Vishay Sfernice
LOCKING DEVICE
This is supplied as an option.
The available spindle length is according to the panel thick-
ness.
1 ± 0.2
Order reference : DBA6.
13
2 tightening screws
Wirewound Rheostat/Potentiometer
PARTICULAR CHARACTERISTICS
NOMINAL
RESISTANCE
Ω
1
1.5
2.2
3.3
4.7
6.8
10
15
22
33
47
68
100
150
220
330
470
680
1k
1.5k
2.2k
3.3k
4.7k
MAX. SERVICE
VOLTAGE
V
5
6.12
7.42
9.08
10.8
13
15.8
19.4
23.5
28.7
34.3
41.2
50
61.2
74.2
90.8
108
130
158
194
235
287
343
MAX. CURRENT
THROUGH WIPER
mA
5000
4080
3370
2750
2300
1920
1580
1290
1070
870
730
605
500
408
337
275
230
192
158
129
107
87
73
spanner n° 14
max. panel thickness 6.5
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 9.5mm.
SPINDLES
Ø
mm
6
6
DISTANCE
TO MOUNTING
PLATE mm
22
25
50
22
SCREW DRIVER
SLOT
WITH
WITHOUT
WITH
WITHOUT
WITHOUT
CODE
ASF
AM
AMF
AL
AS
For any special requirement on request : spindle flats, etc.
Please supply detailed drawing.
COMMAND SHAFT 29JF (OPTION)
18
Ø7
Ø 43
DIAL CG57 (OPTION)
4 holes Ø 3.5
4
3
2
5
Ø 12
6
7
8
47 56
9
21
1
0
47
56
10
SFERNICE trademark, series, style, power rating in watts, ohmic value (in
Ω
or kΩ), tolerance (in %), maximum current in A, manufac-
turing date
MARKING
ORDERING PROCEDURE
VITREOUS
RT
SERIES
25
STYLE
SPINDLE
LOCKING
DEVICE
Optional
L
VARIATION
LAW
SPECIAL
DESIGN
Method N°
Optional
XXX
OTHER SPECIAL
REQUIREMENTS
WINDING
ASF
SPINDLE
(Code)
2.2kΩ
± 10%
OHMIC TOLERANCE
VALUE
Optional
for special
spindles
please supply
detailed drawing
ACC
OPTIONS
MODEL
29JF
KNOB
CG57
DIAL
www.vishay.com
84
For technical questions, contact sfer@vishay.com
Document Number: 50026
Revision 22-Jun-05
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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