Product: RGS4A round-tube bolt-connection fast fuse Key customer benefits Fast, dependable overcurrent protection: RGS4A is a fast-acting fuse that interrupts fault currents quickly to protect sensitive equipment and minimize downstream damage. Secure, low-resistance connection: The round tube bolt-connection design delivers a mechanically stable, repeatable electrical contact that reduces heating and maintenance issues caused by loose terminals. Flexible sizing for correct protection: Available in 60A, 100A, 120A and 200A ratings so you can match fuse time-current characteristics to specific circuit requirements. High-voltage compatibility: Rated for use up to AC 690V and 800V, suitable for medium-voltage distribution and industrial power systems where higher line voltages are present. Features and specifications Model: RGS4A Function: Fast fuse (fast-acting overcurrent protection) Voltage ratings: AC 690V and 800V Current ratings available: 60A, 100A, 120A, 200A Connection type: Round tube with bolt connection for secure mechanical and electrical contact Performance emphasis: Rapid interruption of overcurrent, stable contact resistance, and reliable operation under rated conditions Why this product solves common problems Prevents equipment damage and downtime by clearing faults quickly before thermal or mechanical damage occurs. Reduces false heating and contact degradation with a robust bolt connection that maintains tight clamping force. Simplifies inventory and selection by offering multiple standard current ratings in a single model line compatible with higher-voltage systems. Typical applications Industrial distribution and motor control panels protecting feeders, contactors and motor circuits in plants operating at up to AC 690V/800V. Power distribution switchgear and control cabinets where fast interruption and reliable bolt connections are required. Inverter, transformer secondary, or auxiliary circuits in renewable energy and electrical equipment installations that require specified current protection at higher system voltages. Installation and selection guidance Select the RGS4A current rating (60A, 100A, 120A or 200A) according to the circuit’s steady-state load and protection coordination requirements. Use the round tube bolt terminals to achieve firm mechanical clamping; ensure torque and mounting hardware meet panel and system specifications. Confirm system voltage does not exceed AC 690V/800V rating before installation. RGS4A is intended for applications requiring fast, reliable overcurrent protection with a secure round-tube bolt connection at medium-voltage levels.