Legrand undervoltage release, nominal operating voltage 230 VAC, for triggering in the event of undervoltage or voltage interruption. Short-term voltage interruption can be suppressed (setting range 300 ms). Can be attached to LS switches, FI/FILS circuit breakers from the Legrand TX3 and DX3 series. Tool-free installation by simply clipping onto the left side of the main device, maximum of one control device on the main device.