C&K has added a smaller size to its range of vandal-resistant sealed switches for outdoor ATMs, ticket machines and security systems. Called ATP16, the push-buttons fit through a 16mm diameter panel cut-out – and join earlier ATP19 (19mm) and ATP22 (22mm) types. Construction is from a mix of stainless steel, aluminium alloy and the engineering plastics: PBT (polybutylene terephthalate, UL 94-A0), nylon 6/6, polycarbonate (UL 94-V2) and POM (polyoxymethylene, acetal) – the exact mix depends on the version. The materials are the same as in ATP19 and ATP22, introduced earlier this year, but these have the IK10 protection rating which the ATP16 does not get, according to the data sheet. Sealing is to IP67, operating temperature is across -20˚C to +70˚C, and mechanical operating life is 1,000,000 cycles for momentary versions and 100,000 cycles for locking versions – travel is 2.0mm and 2.3mm respectively, and operating force is 4.5±1.5N for either. Electrically, ATP16 is rated to 2A 36Vdc with an operating life of 200,000 cycles at full load (momentary, 100,000 cycles locking). Dielectric strength is 2,000Vrms (sea level) with 1,000MΩ minimum insulation resistance (500Vdc) and 5...