Surge limiter, varistor with LED, AC 24-48 V, 50/60 Hz, DC 12-24 V, for contactors 3RT2.3 and 3RT2.4 Thanks to the installation compartment already present in the contactor, the surge limiter can be plugged in very easily and without affecting the external dimensions. Simple, efficient, always up-to-date - the SIRIUS modular system.