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Rotary switches deliver high contact reliability

Posted: 16 Jan 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Gina Roos? NKK Switches? MR series? rotary switch?

MR series of rotary switches

NKK Switches offers the MR series of logic level rotary switches with high contact reliability. Available in single-, double- and four-pole models, the process-sealed MR series switches feature a positive detent mechanism for distinct feel and audible feedback as well as self-cleaning contact mechanisms, which deliver high contact reliability. Contact timing is break-before-make and is achieved with sliding contacts in the MRA model and with a rotary contactor disc in the MRF and MRK versions.

The MRA version is rated for 250mA at 125Vac or 48Vdc. The MRF is rated for 0.4VA maximum at 28Vac/dc maximum. Accessories include three different style knobs with various color tips.

The low-profile MRF version features screwdriver actuation that accommodates space limitations. It is rated for 0.4VA maximum at 28Vac/dc maximum. This device has a polyamide cover to allow for cleaning after automated soldering.

All models have molded in PC terminals and are process sealed for automated soldering. Adjustable stopper plates provide 2 to 12 position settings, depending on the number of poles. Mechanical life is rated for 30,000 operations minimum and electrical life is 10,000 operations minimum. Indexing is 30?.

The MRA and MRK panel-mount options have metal bushings in addition to exterior rubber washers and double-flatted bushings to deliver protection in splashproof applications. An interior housing seal and a shaft rubber o-ring allow the switch to be cleaned after automated soldering. Behind panel body depths range from 8.2mm to 17mm.

Pricing is $4.47 in quantities of 500. Delivery is from stock to seven weeks.

- Gina Roos

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