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18 mm Square Rotary Potentiometers (High Rotational Torque)

Specifications

Item Specifications
Type Top Adjustment type, with or without bushing
Mechanical Rotation Angle 280°
Rotation Torque 20 mN・m to 100 mN・m
Detent Pitch 10° to 30°
Shaft Stopper Strength 0.8 N・m min.
Electrical Nominal Total Resistance 5 kΩ to 100 kΩ (Tolerance ±20%)
Power Rating 0.05 W
Potentiometers Type Single, Dual
Insulation Resistance 100 MΩ min. at 250 V DC
Dielectric Withstand Voltage 300 V AC for 1 minute
Noise Level 100 mV max.
Endurance Operating Life 15,000 cycles min.
Minimum Quantity/Packing Unit 80 pcs. (Tray Pack)
Quantity/Carton 800 pcs.

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Common Specifications

Electrical Specifications

1.Taper

Measuring Method Out-put Voltage
between Terminal 1 & 2
/ Operating Voltage
between Terminal 1 & 3
× 100(%)
Out-put Voltage
between Terminal 2 & 3
/ Operating Voltage
between Terminal 1 & 3
× 100(%)
Taper Effective Rotation Angle
EIAJ Panasonic 50% 50%*
15A A 10 to 25 -
1B B 40 to 60 -
15C C - 10 to 25
10A D 6 to 15 -
4B G 40 to 60 -
H BH Linear taper

Notes:

1.* Angle from terminal 3 side.
2.( ) is per JIS (Japanese Industrial Standard). Unless otherwise specified, we consider it at 50 % rotation, however, upon request above JIS can be applied.
3.[ ] is only reference value.

Standard Taper

Standard Taper

2.Tracking

The tracking should be calculated as follows.

Tracking (dB) = 20 log (VR2 / VR1)

Where:
VR1 = Voltage between terminal 1 & 2 of section R1
VR2 = Voltage between terminal 1 & 2 of section R2

Test voltage between terminal 1 & 3 shall be 2 V to 5 V (1000±200 Hz).

In case of a potentiometer with a tap, the measurement should be made by connecting a fixed resistor between tap terminal and terminal 1. Unless otherwise specified, tolerance of the fixed resistor shall be ±10%. If your requirements different, inform us of your specifications.

Mechanical Specifications

1.Shaft Angle

Shaft angle against mounting surface shall be 90°. Shaft bend and shaft wobble shall be a × L/30 (mm) max. when 50 mN·m moment applied to the measuring point of shaft.

Where:
a = Constant Value as shown below
L = Distance between mounting surface and measuring point on the shaft

Size Shaft material Shape & Type Shaft wobble (a) Bending moment
14 mm square
18 mm square
(Common)
Metal shaft Without switch 1-shaft type 0.3 mm 50 mN・m
With push switch 0.5 mm
Insulated shaft With bushing Single 0.5 mm
Snap-in 0.7 mm

2.Nut Tightening Torque

When nut is tightened as specified below, unevenness of shaft rotation shall not occur.

Bushing Dia., etc. Tightening Strength
M7 to M9 1.0 N・M

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