Alps Electric has developed the “SKPS Series” TACT Switch™ with Soft Operating Feel, realizing a high operating force together with a long operating life to make the product ideal for in-vehicle controls. Mass production began in January 2017.

Automobiles are equipped with a wide range of control switches that add to the comfort and safety of the vehicle. Typical examples are air conditioning controls in the center console, audio-visual system controls located on the steering wheel, and switches enabling hands-free calls.

Switches on automotive equipment naturally have to be able to withstand harsh conditions inside a vehicle cabin, such as extreme temperatures and vibrations. Safety-wise, too, they require features for preventing mistakes caused by unintentional operation. And with the ongoing spread of car navigation systems, their screens bigger and bigger, it is important that the switches inside them take up little space. Another growing requirement, since individual switches perform multiple functions, is a long operating life.

In addition, the emergence of electric vehicles that generate no engine sound has led to efforts to create quiet cabins, one consequence being an increasing demand for quiet switches that make little noise when operated.

In 2000, Alps Electric developed and commenced mass production of the SKPM Series Surface Mount TACT Switch™ with Soft Operating Feel as a switch for integration into automotive equipment. The addition to the product lineup of a model with compact dimensions (5.9 × 6.0 × 5.0 mm) and a range of operating forces between 1.57 N and 3.0 N prompted an excellent response from the market and an extensive sales record.

Already in mass production, the newly developed SKPS Series Surface Mount TACT Switch™ with Soft Operating Feel inherits the same dimensions as the SKPM Series while achieving both a high 3.6N operating force and a long life of 300,000 cycles (the life of the SKPM Series is 100,000 cycles). Meanwhile, the travel is shorter than earlier products—reduced from 1.3 mm to 1.05 mm—contributing to the development of control environments with excellent reliability and robustness.

Furthermore, changes were made to the sliding structure of the main stem and rubber dome. A structure preventing ingress by dust or dirt was newly adopted to curb contact issues while achieving the same quiet operation as earlier products.

The size and land dimensions of the SKPS Series are the same as for the SKPM Series. This reduces the workload for equipment manufacturers already using the SKPM Series as there is no need to design a new board.

Features

Surface mount TACT Switch™ with soft operating feel achieving both high operating force and a long life

1. High operating force (3.0 N or 3.6 N) suited to automotive equipment requirements

2. Long life of 300,000 cycles realized despite the high operating force

3. Middle stroke (1.05 mm)

Principal Applications

Switches for car audio-visual and navigation systems, steering wheels and other automotive equipment

Industrial equipment and measuring instruments

Planned Release

Mass production:	From January 2017
Sample price	¥200 (Tax excluded)
Monthly output	2 million units (February 2017)
Development	Engineering Headquarters—Furukawa Plant (Osaki City, Miyagi Prefecture)
Production	Production Headquarters—Kakuda Plant (Kakuda City, Miyagi Prefecture)

Specifications

Model	SKPS Series
Dimensions (W×D×H)	5.9 × 6.0 × 5.0 mm
Operating force	3.0 N, 3.6 N
Travel	1.05 mm
Operating life	300,000 cycles
Rating (max.)	50 mA 16V DC
Initial contact resistance	100 mΩ max.

Source:http://www.alps.com/