Littelfuse FRS-R-1 Fusetron Dual Element Time-Delay Fuse

The Littelfuse FRS-R-1 Fusetron Dual Element Time-Delay Fuse is a 1 A, 600 V protective device designed to guard electrical circuits against overcurrent. As part of the Fusetron family, it employs a dual-element time-delay (slow-blow) design that tolerates brief current surges, such as inrush, without nuisance tripping while still interrupting the circuit when the fault persists. With a 1-amp rating and a 600-volt maximum rating, it provides reliable protection for 600 V systems against sustained overloads. The FRS-R-1 is a practical choice wherever a time-delay fuse is required to balance surge tolerance with protection, delivering consistent performance in applications that demand predictable response to transient and fault conditions. This Littelfuse device is identified by the part number FRS-R-1 and is suitable for use in circuits that require a known, standard slow-blow protection characteristic within the 600 V range.