MFZ A4BX300-150 300A WLDR FUS

Mersen A4BX welder protectors are special purpose limiters used to provide isolation of faulted welding equipment and protection for the cable drop supplying the welder. Welder protectors have a high thermal capacity and are less affected by high ambient temperatures and extended weld times than similar size Class J, K, or R fuses. Welder Protectors should only be applied for isolation of short circuited welding circuits. Overload protection must be provided for by other means.