Bussmann FNA-6 Time Delay Fuse

The Bussmann FNA-6 is a time-delay fuse (slow-blow) rated for 6 amperes at 125 volts, designed to protect electrical circuits from overcurrent while tolerating brief surge currents without opening. As part of the Bussmann FNA family, it provides a compact, replaceable protection option for 125 V systems and is suitable for circuits where short-duration overloads may occur. The time-delay characteristic allows for brief surges to pass without nuisance trips, while still interrupting the circuit when a sustained fault appears. The 6 A rating defines the maximum continuous current the fuse is designed to carry, and the 125 V rating indicates the upper voltage limit for safe operation. This fuse is intended for use in circuits operating within those parameters, providing reliable protection for connected loads against overcurrent events.