0451010.MRL Fuse, Surface Mount, 10 A, Very Fast Acting, 125 VAC, 125 VDC. The 0451010.MRL is a 10A/125VAC very Fast Acting Fuse with ceramic body, gold-plated caps and tin-lead alloy termination. This 451-series square surface mount halogen-free fuse features small size and low temperature de-rating. Suitable for the secondary side circuit over-current protection applications and is designed for PCB using surface mount technology.