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October 29, 2014

[Product Information]

Contributing to the Development of Even Thinner Electronic Devices

Alps Electric Develops and Commences Mass Production of “SKTG Series” Side Push TACT Switch™ (PC Board Cut-Off Type)

Alps Electric Develops and Commences Mass Production of “SKTG Series” Side Push TACT Switch(TM) (PC Board Cut-Off Type) Use Enlarged Photo


TOKYO- Octorber 29, 2014 -Alps Electric has developed the “SKTG Series” Side Push TACT Switch™ (PC Board Cut-Off Type) (IP67-rated), ideal for embedding in smartphones and other mobile devices. Mass production is already underway.

Smartphones and other mobile devices are becoming increasingly sophisticated and their displays keep growing bigger. Not only that, end products are continually being made thinner and lighter to improve portability, requiring the electronic components inside them to support ongoing size and thickness reductions.

Switches employed in these devices, besides retaining an operating life on a par with existing models, must also provide reliability with the durability to withstand unexpected events such as dropping, as well as dust and water resistance to allow outdoor use.

Responding to these market needs, Alps Electric has developed and commenced mass production of the SKTG Series Side Push TACT Switch™ (PC Board Cut-Off Type). Because the SKTG Series is designed to be mounted into a PC cut-out, it has an even lower profile than the existing SKTD Series, achieving a switch height above the PC board of 0.85mm, around 45% smaller than the existing model. This contributes to ongoing size and thickness reductions of end products.

The SKTG Series uses a PC board cut-off format, whereby the switch is mounted into a cut-out in the board. This format does not require a flexible or sub PC board for connecting the switch and board and thus contributes to cost reductions in end product design. Optimizing the design and composition of the various parts using mechanical design and material technology built up by Alps Electric over many years has also helped to ensure strength when mounted.

Operating life, which tends to deteriorate with size and height reductions, was secured through optimization of the metal contacts using analysis technology. An operating life of 200,000 cycles was thus realized despite compact dimensions of 3.7 × 3.5mm. Furthermore, use of a sealed contact structure realizes IP67 dust and water resistance.

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Side Push TACT Switch™ (PC Board Cut-Off Type) contributing to thinner electronic devices

  1. Mounting in a PC board cut-out realizes a height of 0.85mm above the board
  2. Mounting in a PC board cut-out improves solder peel strength
  3. Metal contact optimization enables a 200,000-cycle life despite compact dimensions
  4. Sealed contact structure ensures a highly reliable switch (IP67 dust and water resistance)

Principal Applications

Smartphones, tablets, other mobile devices, cameras and wearable electronics

Planned Release

Mass production From October 2014
Sample price ¥60 (incl. tax)
Planned monthly production 3 million units (April 2015)
Development Furukawa Plant, Engineering Headquarters
(Osaki City, Miyagi Prefecture)
Production Kakuda Plant, Production Headquarters
(Kakuda City, Miyagi Prefecture)



Model SKTG Series
Dimensions (W×D) 3.7 × 3.5 mm
Installed height: 0.85 mm
Operating force 1.6 N
Travel 0.15 mm
Operating life 200,000 cycles
Rating (max.) 12V DC 50mA
Initial contact resistance 500mΩ max.

About Alps Electric Co., Ltd.

 Alps Electric (Tokyo: 6770) is a leading global manufacturer of high-quality electronic components for mobile devices, home electronics, vehicles and industrial equipment. With the philosophy of “Perfecting the Art of Electronics” Alps Electric supplies over 40,000 different components to about 2,000 companies all over the world. For more information, visit