Wheel Volume Control For Hearing Aids

Many hearing aids need to have volume control. Usually this is done with a wheel. All volume controls need to be pushed up to make the hearing aid louder and down to make it quieter.

Features

●High stop strength

●Gold-plated, silver alloy leads

●Switch life rated to 75,000 cycles

●Various knob styles available

●Enclosed housing minimizes risk to contamination and corrosion

●High heat resistance

Wheel Volume Control Specifications

Mechanical Data

Rotational Life . . . . . . . . . . . . . . . . . . . . . >25,000 cycles                           

Stop Torque . . . . . . . . . . . . . >5.0 Ncm (7.1 oz.-in.) typ.

Mechanical Rotation . . . . . . . . . . . . . . . . . . . . 270° ± 3°

Switch Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22° ± 3°

Knob Pull Strength . . . . . . . . . . . . . . . >15.6 N (3.5 lbs.)

Environmental Data

Soldering Temperature. . . . . . . . 260°C/500°F for 5 sec. or 315°C/600°F for 1 sec. min. 0.02 in. from housing

Storage Temperature . . . . . . . . . . . . . . . -40°C to +60°C

Operational Humidity . . . . . . . . . . . . . . 10% to 95% RH

Cleaning . . . . . . . . . . . Aqua wash (Alpha 2110), Ligroin, Ammonia, 10% solution with demineralized water

Electrical Data

Switch Contact Resistance. . . . . . . . . . . . 50 mΩ (max.)

Power Rating. . . . . . . . . . . . . . . . 10 mW @ 40°C (max.)

Resistance Values. . . . . . . . . . . . . . . . . . . . . 2.5 K – 2 M*

Resistance Tolerance. . . . . . . . . . . . . . . . . . . . . . . . ±20%

End Resistance Start Value . . . . 1% of total resistance
or 50 Ω, whichever is greater

Construction

Plastic Parts . . . . . . . . . . . . . . . . . . . . . . . . Thermoplastic
Terminals, Switch Contact . . . . Gold-plated copper alloy