# Mitsubishi Electric NF400-SS No-Fuse Breaker 300A 660V AC

Ensure robust electrical protection with the **Mitsubishi Electric NF400-SS No-Fuse Breaker**. Engineered for demanding industrial automation and marine applications this **300 Amp AC 660V** device offers superior circuit safeguarding. Its advanced design minimizes downtime and protects critical equipment from electrical faults.

This exceptional breaker features a **3 pole configuration** for comprehensive system stability and includes an **under voltage trip** module type UTV-MC for instantaneous response in control systems. With an auxiliary switch rated at AC 250A it provides enhanced operational flexibility. If you need reliable protection for heavy loads this breaker is an ideal choice.

-   **High Performance** with 300 Amp capacity and 660V AC rating.
-   **Enhanced Safety** featuring an under voltage trip for immediate fault response.
-   **Durable Construction** built to Mitsubishi Electric standards for long-term reliability.
-   **Versatile Application** suitable for industrial automation and marine environments.
-   **Efficient Operation** with instantaneous trip capabilities and auxiliary switch control.

Discover the difference Mitsubishi Electric quality makes. When your operations demand unwavering protection and efficiency choose the **Mitsubishi Electric NF400-SS**. Invest in peace of mind for your critical systems.

## Details

- **Price:** 999.0 USD
- **Vendor:** Mitsubishi Electric
- **Type:** Electrical > Circuit Protection > Circuit Breakers
- **Tags:** 300 amp breaker, 660v ac breaker, circuit protection, industrial automation, marine electrical, mitsubishi electric, mitsubishi electric nf400-ss, no-fuse breaker

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| New | 999.00 USD | In stock |

## Images

- Mitsubishi Electric NF400-SS No-Fuse Breaker 300A 660V AC-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/mitsubishi-electric-nf400-ss-no-fuse-breaker)
> Updated: 2026-09-19