The 4 Way RCCB / RCD Breakers from ESR are available in a range of amp ratings & Time delay including 63 Amp 30mA, 63 Amp 100mA, 80 Amp 30mA, 80 Amp 100mA and 80 Amp 100mA Time Delay. This range includes the RCD4-6330, RCD4-63100, RCD4-8030, RCD4-80100 and RCD4-80100T models. An RCD is a sensitive current breaker designed to protect the user and their property from electric shock and potential fires by breaking the current as is passes through your consumer unit in the event of a detected imbalance or disruption to current path. RCDs are known to save lives and are a commonly used component in domestic consumer unit configurations. These RCD modules will use 4 modules/ways on your ESR consumer unit rail bar, and will trip the entire circuit associated with it in the event of a detected fault. These RCCB modules are designed to trip at an imbalance of your choice in 30mA or 100mA options with a timed module available. We advise consulting your electrician if you are unsure whic