Eaton 449D672A21 - RBT4 Medium Voltage Fuse 7200V/400A (29.4kA AIC)

Eaton 449D672A21 is a medium voltage RBT4 fuse designed for high-capacity circuit protection in industrial power systems. It features a 7200V voltage rating and 400A current rating with a slow-blow characteristic for controlled interruption. The single-barrel Class E fuse has a 29.4kA interrupting capacity at 7.2kV, housed in a durable 3 lb construction meeting industry standards for medium voltage applications. Typical uses include transformer protection, feeder circuits, and industrial switchgear installations where reliable high-voltage interruption is critical.

Key Features & Specifications

• Type: RBT4 medium voltage fuse, slow-blow characteristic
• Voltage Rating: 7200V AC
• Current Rating: 400A
• Class Rating: E
• AIC Rating: 29.4kA @ 7.2kV
• Barrels: 1
• Velocity: Slow
• Weight: 3 lb
• Standards: Meets medium voltage fuse industry requirements
• Applications: Transformer protection, industrial switchgear, feeder circuits