NJL-S3400 | Circuit Breaker | 400A | 3-Pole | 600V

NJL-S3400 Circuit Breaker is an industrial-grade safeguard engineered for dependable protection in 3-phase power systems up to 600V. Rated at 400A with a 3-pole design, this unit is built to interrupt heavy loads quickly and safely, helping to minimize equipment damage and downtime during faults or maintenance.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V

Why this breaker stands out

Designed for maintenance, retrofit, and replacement projects where precise compatibility matters, the NJL-S3400 offers a reliable, straightforward path to restoring and protecting your three-phase distribution. Its robust construction and clear ratings give technicians confidence when upgrading panels or reviving aging infrastructure. The part number NJL-S3400 serves as the best reference for ensuring a correct fit in your existing equipment.

Ideal use cases

• Replacing a failed or aging 3-pole breaker in a 600V distribution panel
• Retrofits where matching amperage and three-pole configuration are required for three-phase feeders
• Maintenance replacements to minimize system downtime during electrical servicing
• New installations within equipment designed for 400A, 3-phase protection in 600V systems

Installation & compatibility

Before ordering, confirm fit and ratings to ensure seamless integration with your panel or switchgear. The NJL-S3400 is specifically referenced by its part number, which is the most reliable indicator of compatibility with existing setups. For best results, have a licensed electrician verify mounting, electrical clearances, and proper switching duty for your application.

Practical tips for use:

• Keep a spare NJL-S3400 on hand for planned maintenance to reduce downtime.
• Document the exact panel model and any accessory requirements when planning a retrofit or replacement.
• Follow manufacturer installation guidelines and local electrical codes for safe operation and service life optimization.

With the NJL-S3400, you’re investing in a proven solution for reliable overcurrent protection in demanding 600V, three-phase environments. Its precise specifications and clear compatibility guidance help you execute maintenance, retrofits, and replacements with confidence.