Compact SPD with in-built back up MCB - saving on space, MCB selection, wiring time. Compliance to EN 61643-11. Withdrawable Type - Cost Efficient - Allows damaged Cartridges to be replaced without having to replace entire SPD. Inbuilt SPD Health Indicator on front face of device; Remote signaling functionality also available. Incoming Protection: iQuick PRD 40r (High Risk level) and iQuick PRD 20r (Moderate Risk level). Secondary Protection: iQuick PRD 8r is cascade mounted with incoming surge arresters.