Bussmann NTN-R-400 High-Performance Fuse

Overview

The Bussmann NTN-R-400 is a premium 400 Amp, 600V AC/DC time-delay fuse designed for robust overcurrent protection in demanding electrical systems. Engineered for reliability and safety, this current-limiting fuse features a rugged ceramic body and sand-filled construction to rapidly suppress high-fault currents while withstanding industrial environments.

Key Features

• 400A Rated Current: Handles high-load circuits up to 400 amps
• 600V AC/DC Rating: Dual-rated for AC and DC applications
• Time-Delay Design: Sustains temporary inrush currents (e.g., motor starts) without nuisance tripping
• Current-Limiting Action: Interrupts high short-circuit currents (<50,000A) in milliseconds
• Ceramic Construction: Heat-resistant body ensures durability and arc containment
• UL/CSA Certified: Compliant with North American safety standards
• Indicator Feature: Visual fault indication for quick maintenance identification

Typical Applications

• Industrial control panels and switchgear
• Motor protection circuits
• Transformer and capacitor bank safeguards
• Renewable energy inverters (solar/wind)
• Heavy machinery and HVAC systems
• Power distribution units (PDUs)

Specifications

Why Choose NTN-R-400?

Bussmann’s NTN series delivers industry-leading protection with field-proven performance. The NTN-R-400 provides critical defense against catastrophic equipment damage, combining exceptional fault current interruption with tolerance for routine operational surges. Ideal for upgrading aging protection systems or specifying in new installations where electrical safety is non-negotiable.

Compatible with standard fuse clips and holders; verify local regulations before installation.