Type 31 Series
Tyco will customize these neat 16mm
diameter control potentiometers to suit
your requirements. They comprise a
printed carbon resistance element with
0.25 W current handling and are avali-
able with various bush, termination and
spindle styles.
As an additional feature, the range
includes a twist tab design with mount-
ing bracket applications for use where
low price is an important consideration.
Key Features
■Versatile Design can be
Customised to Suit Your
Requirements
■SPST Switch Style
■Low Cost Twist Tab
Model
■PC Mounting Bracket
■Insulated Shafts Up
To 50mm
■Non Linear Laws
■Available with Choice
of Bush Styles
■Eyelet or PC
Terminations
Characteristics -
Electrical
Characteristics -
Mechanical
Operating Torque: 15 mNm, Max.
Mechanical Rotation: 270° Nominal
End Stop Torque: 350 mNm, Max.
Characteristics -
Environmental
Limits of Resistance Change: 15% (After 1000 hours endurance)
Temperature characteristics of 5%
resistance ( 20°C to 70°C ):
Bump Severity: 390m/s2, 4000 Bumps
Vibration Severity: 10 - 500 Hz, 0.75mm or 98m/s2
Climatic Category: 8 days @ 36°C 82% RH DR < 15%
Mechanical Endurance: 15000 Operations ( Min )
DIY
Design
The 31 Series can be customised to suit your individual requirements with features such as detent action,
track centre tap etc.
Please call our technical sales team to discuss variations on these 16mm diameter devices.
Resistance Range (Law): 1K Ohm to 1M Ohm Linear
4K7 to 470K (Non Linear)
Resistance Values: 1, 2.2 and 4.7 per decade
Resistance Tolerance: ± 20% (± 10% by selection)
Rated Dissipation at 40°C: 0.25W (Linear), 0.125W (Non Linear)
Limiting Element Voltage: 350Vdc or ac RMS
Electrical Rotation: 267° NOM without switch, 240° NOM with switch
Terminal Resistance: 5 Ohms, Max.
Noise (ENR): 2% Max. (Linear), 3% Max. (Non Linear)
Insulation Resistance: 4 G Ohms Min.
Voltage Proof: 500 Vac peak
Resistance
Laws
A - Linear
B - Log
C - Inverse Log
0 102030405060708090100
% Effective Electrical Clockwise Rotation
100
90
80
70
60
50
40
30
20
10
0
A
B
C
Percent Voltage Rated Output
Literature No. 1773116
Issued: 2-09
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
Spindle Operated Potentiometers
Type 31 Series
Dimensions
Type 31 Type 32
Type 34 (Non Switched only) Type 35 (Non Switched only)
Type 36
Multi Ganged Types
Switched Types
Literature No. 1773116
Issued: 2-09
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
Spindle Operated Potentiometers
Type 31 Series
How to Order
31 E X A 104 M W B 25 B
Potentiometer Type
S- Standard
X - Customer Special
See Drawing
(provide copy
with order)
Customer Identity
The first two digits are
signifigant figures of
resistance value and the
third denotes the num-
ber of zeros following.
e.g. 4.7K Ohms: 472
22K Ohms: 223
100K Ohms: 104
Resistance Value Bush Details
FMF in mm
Standard Lengths are
15, 20, 25 and 50mm
Shaft Length
Termination Style
A - Linear
B - Log
C - Inv. Log
Resistor Law
K - 10%
M - 20%
Resistance Tolerance Shaft Style
A - DPST - Demko
approved 4A/250V AC
B - SPST - Eyelet
Termination
C - DPDT - Changeover
Switch
T - SPST - PC Push
Switch
Switch Details
31 - Std Spindle Style
32 - No Bush
Mtg Bracket
33 - Spindle with Integ
Knurled Knob 4mm
State Colour
34 - Rev Mount with
mounting pin and PC
terminals swept down
to board
35 - Rev Mount with
PC Terminals swept down
to board.
No terminal on case
36 - Forward mount with
PC pins swept forward
to parallel to shaft
37 - Dual gang style sin-
gle shaft same value / tol
on each section
38 - Single Spindle Pot
with centre detent
E - Std Eyelet
P - Std PC 12.5mm MH
R - Long PC 15mm MH
X - Extra long for
rear PC Mtg
S - PC bend forward
at 90°
N - Black plastic 8mm
A/F - M10 with 4mm hole
P -Diecast M7 x 6mm
4mm hole
S - Diecast M10 x 8mm
6.35mm hole
T - Diecast M7 x 9mm
4mm hole
U - No Bush
V - Diecast M10 x 8mm
6mm hole
W - Black plastic M10
8mm M10 6mm hole
A - Plain 6mm
B - Slotted 6mm
C - Flatted 6mm
(5mm A/F)
D - Flatted 6mm
deep flat 4mm A/F
E - Plain 4mm
F - Full 6.35mm flat -
special angle
G - Flatted 4mm
H - Plain 6.35mm
J - Flatted 6.35mm
(4.6mm A/F)
Literature No. 1773116
Issued: 2-09
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
Spindle Operated Potentiometers
Type 31 Series
