NKK Switches – S Series: Combat Harsh Environments with Rugged Toggle Switches

For design engineers, every harsh environment presents its own set of challenges stemming from a host of factors, such as extreme temperatures, water, chemicals, dust, oil and other types of contaminants.

Rated at IP67 of IEC60529 standards, NKK’s S Series gives design engineers the ability to incorporate a reliable toggle switch into designs that can be used in a variety of rugged environments. The standard bat-style actuator models also feature an optional splash-proof boot to cover the base of the actuator for additional sealing to guard against dangerous contamination.

All S Series switches feature solder lug terminals and are panel mount with 12mm threaded bushings. The series’ mounting design conforms to standard panel cut outs with electrical capacities ranging from 15A to 20A at 125VAC, 6A to 10A at 250VAC and 15A to 20A at 30VDC.

The S Series is available with or without locking levers, the 17.5mm toggle switches feature many circuit configurations, including SPST, SPDT, DPST and DPDT, with a choice of momentary or maintained circuits. Locking levers can be specified for maintained circuits and standard hardware includes a hex nut, lock washer and an O-ring for panel sealing. In addition, engineers have the option of specifying 0.250” quick connect terminals and ON/OFF inscribed plates.

NKK has the products and the technical expertise to help engineers choose the right switch for today’s harsh environment applications. NKK offers free 3D CAD models, free switch samples and custom switch solutions, allowing engineers to take their designs to the next level!


  • Low/medium/high capacity
  • Variety of splashproof boots
  • Mechanical life 30,000 to 50,000 operations
  • minimum
  • Electrical life 25,000 operations minimum
  • IP-rated models available


  • Industrial equipment
  • Heavy machinery
  • Construction equipment
  • Transportation vehicles
  • Aircraft
  • Automotive
  • Outdoor concert and lighting equipment
  • Portable power tools
  • Telecommunication devices