The D4 snap-action switches have an increased tracking resistance of PTI 300, a high functional reliability, and switching precision. To provide high contact reliability, the switches utilise application-specific contact materials for switching currents from 0.1 up to 21A at 250VAC. The devices are offered with a number of actuators and mounting points, making them suitable for a variety of applications.
The D4 snap-action switches, which operate from an ambient temperature range of -40 to +150°C, conform to IEC 60335-1 requirements: GWFI at 850, GWIT at 775 and GWT 750°C.