# ABB E4S 4000 PR121-P-LSIG Circuit Breaker 4000A 4 Pole

Introducing the ABB E4S 4000 PR121-P-LSIG, a high-performance circuit breaker designed for robust industrial automation and marine applications. This 4-pole unit offers exceptional protection and reliability, ensuring the safety and integrity of your electrical systems. Its advanced LSIG protection functions provide comprehensive safeguarding against overload, short circuit, and ground faults, making it an indispensable component for demanding environments. Experience unparalleled operational efficiency and peace of mind with this advanced ABB breaker.

Engineered for critical power distribution, the ABB E4S 4000 PR121-P-LSIG operates seamlessly within complex control systems. Its robust construction and precise tripping characteristics ensure consistent performance, even under strenuous conditions. This breaker is ideal for applications requiring high current handling capabilities up to 4000A, supporting critical infrastructure in manufacturing plants, data centers, and marine vessels. Ensure your systems are protected by ABB's commitment to quality and innovation.

-   **Advanced LSIG Protection** for comprehensive fault detection and interruption.
-   **High Current Capacity** up to **4000A** suitable for heavy-duty applications.
-   **Durable Construction** ensuring longevity and reliable performance in harsh conditions.
-   **Designed for Industrial Automation** and critical marine power distribution systems.
-   **Enhanced System Safety** through precise and rapid fault response.

What are the key features of the ABB E4S 4000 PR121-P-LSIG circuit breaker This advanced unit offers superior protection with its LSIG functions and a 4000A current rating, perfect for safeguarding industrial electrical systems. Invest in the reliability and advanced protection of ABB E4S 4000 PR121-P-LSIG for your critical infrastructure.

## Details

- **Price:** 999.0 USD
- **Vendor:** ABB
- **Type:** Electrical > Circuit Breakers > Molded Case Circuit Breakers
- **Tags:** 1SDA056810R1, 4 pole breaker, 4000A breaker, ABB, circuit breaker, E4S 4000, industrial automation, LSIG protection, marine electrical, PR121-P-LSIG

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 999.00 USD | In stock |

## Images

- ABB E4S 4000 PR121-P-LSIG Circuit Breaker 4000A 4 Pole-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/abb-e4s-4000-pr121-plsig-4000a-4p)
> Updated: 2026-09-21