Rotary switch gives tactile feedback in compact design

A 0.5-inch rotary switch from Elma Electronics is customisable in small quantities.

Elma Electronic’s MR50 offers shaft, position and switching torque options.

It is designed for portable, mobile and space-constrained devices which are used in harsh environments, says the company.

It offers precision selection with up to 16 selector positions, that offer tactile feedback, even when the user is wearing gloves.

Typical applications include avionics, military targeting and communications as well as cockpit controls and transportation-related devices. The MR50 is believed to be the only ruggedised half-inch rotary switch not subject to ITAR controls.

Elma’s manufacturing facilities are located in Europe, where ITAR registration does not apply to either the MR50 or any of Elma’s other rugged switches and encoders.

The MR50 has a zinc die-cast housing with nickel plating, solid gold contacts and a robust stainless-steel shaft. It also has the option of IP68 front panel sealing, making it suitable where reliability in extreme conditions is required. Switching torques are selectable at either three or six Ncm, depending on the user’s preferences.

The robust MR50 switches are also cost-effectively customisable, even in smaller quantities, with competitive lead times, says Elma Electronics. Users can select between round and D-shaft configurations as well as the lengths of the shaft. Standard switch configurations include 10, 12 and 16 positions, with shorting or non-shorting contact arrangements available regardless of the number of positions.

Operating temperature range is -45 to +85 degrees C (IEC 60068-2-14).

The standard MR50 version is currently one-pole, however two- and three-pole versions are planned shortly. The series meets humidity, vibration and shock to MIL-STD-202G standards.

This news story is brought to you by, the specialist site dedicated to delivering information about what’s new in the electronics industry, with daily news updates, new products and industry news.

To stay up-to-date, register to receive our weekly newsletters and keep informed of the latest technology news and new products from around the globe. Simply click this link to register here: