The 3403.0161 is a 0.315A/250VAC time-lag Non-resettable Fuse with ceramic housing and tin-plated copper alloy terminals. This UMT-series surface mount fuse features high breaking capacity. Directly solderable onto PCB's. Protects against fault conditions up to 200A. Provides low voltage primary and secondary protection. Devices meet applicable international safety standards. Used for primary protection on SMD PCBs.