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These switches are part of the PBA series including models with dia. 16, 19 or 22 mm bushing. Sealed to IP68 or IP69K, easy to clean metal surface, long life (50 million cycles), ring or dot illumination, custom configurations.This series is approved according to the ATEX 2014/34/EU directive.

Main features

  • Approved according to the ATEX 2014/34/EU directive
  • Sealed to IP66 (mounted on panel)
  • Easy to clean metal surface
  • Long life (50 million cycles)
  • Iluminated models 


APEM Piezo switches are based on a solid-state output allowing for a very long life expectancy (more than 50 millions cycles), ideal for demanding applications where reliability is most important. The flat actuation surface is completely closed, preventing the intrusion of liquids or other contaminants, perfect for surface cleaning required in the medical and food-processing industries. High performance sealing (IP68 and IP69K) is achieved due to the one-piece construction of the switch. No external power supply is required. The screw-machined metal housing construction and APEM’s vertical integration allow for the manufacture of a variety of shapes.

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Ergonomics 1

Ergonomics 2


General specification

* Changes to the latest standards
• Operating force : 2 to 6 N
• Torque : 2.5 Nm max.
• Life expectancy : 50 million cycles
• EMC compatibility according to EN 61058-1
• In accordance with EN 60079-0:2009*, EN 60079-26:2007, EN 60079-11:2012, EN 50303:2000

* Changes to the latest standards EN60079-0:2012 | A11:2013 and EN60079-26:2015 do not affect compliance with the essential requirements.

Environmental specifications

• Operating temperature : -40 °C to +55 °C
• Sealing : IP66 per IEC 60529 (switches mounted on panel)

Electrical specifications

• Rated voltage : 5 V to 24 VAC/DC max.
• Rated current : 200 mA max. at 6 VAC/DC
50 mA max. at 24 VAC/DC (power limited to 1.2 W for user group II)
• Contact resistance (ON) : 10 Ω max.
• Insulation resistance (OFF) : 5 MΩ min.
• Make impulse time : depending on actuating force and speed
• LED : 5 VDC, 10 mA to 20 mA depending on model


• Case : 316L stainless steel
• Terminals : multi-wire leads 0.22 mm2, length 300 mm (11.81)

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