Precision Rotative Transducers,
Conductive Plastic, Bushing Mounting
Series ROT/BF
Vishay Sfernice
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 54005
44 Revision: 22-Mar-07
A complete range of bushing mounting rotational motion
transducers.
FEATURES
•Size 08 to 30
•Linearity ± 1 % down to ± 0.05 %
•Good repeatability
•Long life
•Essentially infinite resolution
•Up to 6 electrical functions with the same shaft
•On request custom design to meet your specifications
•Following MIL-R-39023 and NFC 93-255 requirements
RoHS
COMPLIANT
SIZE 08 09 11 13 15 18 20 30
MODEL 34 BF 78 BF 116 BF 156 BF 176 BF 134 BF 200 BF 300 BF
ELECTRICAL SPECIFICATIONS
Functions Linear, on request specific law
Theoretical Electrical Angle (TEA) Actual electrical angle (AEA) - 2°
Independent Linearity (over TEA)
Best Linearity Available
A ≤ ± 1 % or B ≤ ± 0.5 % or C ≤ ± 0.25 %
C ≤ ± 0.25 % Down to D ≤ ± 0.1 % Down to E ≤ ± 0.05 %
Actual Electrical Angle (AEA) 340° ± 3° 350° ± 2°
Ohmic Values (RT)1 kΩ - 2 kΩ - 5 kΩ - 10 kΩ - on request other values
Ohmic Value Tolerances at 20 °C ± 10 %
Output Smoothness ≤ 0.05 % ≤ 0.025 %
Maximum Power Rating at 70 °C 0.25 W 0.3 W 0.4 W 0.5 W 0.75 W 1.0 W 1.2 W 1.5 W
Wiper Current Recommended: a few µA - 1 mA max. (continuous)
Tap (Current or Voltage)
On Request with Angular Position to be Specified
U = current { Position: ± 2° / T = voltage Position: ± 2°
{ Width: ≤ 4°
Load Resistance on Wiper (RL)min. 10
3 x RT
Repeatability ≤ 0.02 %
End Voltage ≤ 0.4 % for 470 Ω ≤ RT ≤ 1000 Ω / ≤ 0.2 % for 1000 Ω < RT ≤ 2200 Ω / ≤ 0.1 % for RT > 2200 Ω
Insulation Resistance ≥ 1000 MΩ, 500 VDC
Dielectric Strength ≥ 750 VRMS, 50 Hz ≥ 1000 VRMS, 50 Hz
MECHANICAL SPECIFICATIONS
Mechanical Rotation 360° continuous; stops on request
Mounting Type Bushing
Shaft Guiding Sleeve bearings; on request ball bearings
Shaft Stainless steel
Housing Plastic moulding; on request anodized aluminum
Termination Turrets; on request flexible leads, cables...
Wiper Precious metal multi-finger contact
Starting Torque (N.cm) ≤ 0.5 1 cup; ≤ 0.3 for each additional cup
Moment of Inertia (g. cm2) 0.3 0.4 0.6 0.8 2.2 2.8 3.5 10
Weight (g) 1 cup 11 ± 2 20 ± 2 21 ± 2 30 ± 2 33 ± 2 45 ± 3 54 ± 3 120 ± 10
each additional cup 5 ± 2 6 ± 2 7 ± 2 14 ± 2 16 ± 2 18 ± 3 21 ± 3 62 ± 10
PERFORMANCE
Life (Million of Cycles) ≥ 20
Temperature Range - 55 °C to + 125 °C
Climatic Category 55/125/04
Rotation Speed (RPM) 150
Series ROT/BF
Precision Rotative Transducers,
Conductive Plastic, Bushing Mounting Vishay Sfernice
Document Number: 54005 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 22-Mar-07 45
Special characteristics and designs on request
DIMENSIONS in millimeters, general tolerance ± 0.5 mm
DIMENSIONS DESIGNATION SIZE POTENTIOMETER REFERENCE
08 09 11 13 15 18 20 30
MODEL 34 BF 78 BF 116 BF 156 BF 176 BF 134 BF 200 BF 300 BF
A- 0
- 0.013 Ø shaft 3.175 3.175 3.175 3.175 6.345 6.345 6.345 6.345
C max. Ø body 19.18 22.3 27.07 33.35 36.6 44.5 50.9 76.4
H min. Turret location 4.2 4.7 5.35 5.35 8 8 7.45 5.55
I max. Radius on turrets 14 15.4 17.3 20.8 23.1 26.6 29.7 43.7
J max. Radius on screw clamp 13.5 15.4 17.3 18.9 23.1 26.5 29.3 42.6
K Ø on clamp 19.6 23.8 27.7 33.6 37.4 44.5 50.8 77.5
O Locating pin (on request) 7.2 8 8.8 9 14.4 16.8 13.48 -
P max. Ø pin (on request) 1.6 1.6 3.25 3.25 3.25 3.25 - -
L ± 2° Angle between turrets 30° 30° 25° 20° 20° 25° 15° 15°
M max. Total angle 100° 100° 100° 100° 80° 80° 80° 80°
N max.
1 cup 14.519191921212120.5
2 cups 21.5 25 21.5 24 24.5 24.5 26 23.5
3 cups 34.5 38 34.5 38 37.5 37.5 38 -
4 cups 40.5 48 40.5 45.5 48 48 48 -
5 cups 53 61 53 59 60.5 61 62 -
6 cups 59 72 59 67 72 72 72 -
ORDERING INFORMATION/DESCRIPTION
ROT 156 B F 1 C T 502 e1
SERIES SIZE MOUNTING TYPE CONDUCTOR NUMBER OF CUPS LINEARITY TAP OHMIC VALUE LEAD FINISH
B: Bushing F: Plastic film From 1 up to 6 A: ± 1 %
B: ± 0.5 %
C: ± 0.25 %
D: ± 0.1 %
E: ± 0.05 %
On request
T: Voltage
U: Current
position to
be specified
First 2 digits are
significant
numbers 3rd
digit indicates
number of zeros
SAP PART NUMBERING GUIDELINES
RO 116BF 1 D 103
MODEL GANG NUMBER LINEARITY OHMIC VALUE
From 1 up to 6 10 kΩ
Note:
· On Request
N
1.6
9.9 MAX.
20 MAX.
*
Ø C
0.4 x 45
Ø A
H
Ø 9.52 x 0.79
3/8 - 32 NEF2A THD
DELIVERED WITH NUT + WASHER
0.5 x 45°
J
O
Ø K ON CLAMP
Ø P
I
M
L
L
Ø 10.3 - 0
- 0.02
321
CLOCK WISE
VIEWED FROM
SHAFT SIDE
ELECTRICAL
CONNECTIONS
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
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.
