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

The **E4S 4000 PR121 LSIG** circuit breaker, manufactured by **ABB**, is a robust solution for demanding industrial power distribution needs. Designed for optimal performance, this circuit breaker ensures reliable protection and efficient power management in various applications. It's engineered to meet the stringent requirements of medium to large-scale electrical systems, providing safety and operational efficiency.

This **ABB E4S 4000 PR121 LSIG** circuit breaker features a 4000A current rating and four poles, making it suitable for applications requiring high current capacity and versatile installation options. The **LSIG** functionality provides enhanced protection against overloads, short circuits, and ground faults, ensuring the integrity of your electrical system. This circuit breaker is built to withstand harsh environments, guaranteeing long-lasting performance and operational reliability. It is an ideal for use in industrial settings, ensuring the safety and efficiency of power distribution.

-   **High Current Rating**: Handles up to 4000A, perfect for demanding industrial applications.
-   **LSIG Protection**: Provides comprehensive protection against overloads, short circuits, and ground faults.
-   **Durable Design**: Built to withstand harsh environmental conditions, ensuring long-lasting performance.
-   **Versatile Installation**: Four-pole design offers flexible installation options for various system configurations.
-   **ABB Quality**: Engineered by ABB, a trusted leader in electrical solutions.

The **E4S 4000 PR121 LSIG** offers exceptional performance and reliability for your power distribution needs. Its robust construction and advanced features provide peace of mind in industrial and automation systems. Trust **ABB** and **Ram Automations** for quality and performance. For inquiries, contact us at [info@ramautomations.com](mailto:info@ramautomations.com).

## Details

- **Price:** 999.0 USD
- **Vendor:** ABB
- **Type:** Industrial Automation > Circuit Breakers > Low Voltage Circuit Breakers
- **Tags:** 4 pole circuit breaker, 4000A circuit breaker, ABB, E4S 4000 PR121 LSIG, industrial power distribution, LSIG circuit breaker

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| New / 1SDA056810R1 | 999.00 USD | In stock |

## Images

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

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> Source: [Ram Automations](https://ramautomations.com/products/e4s-4000-pr121-lsig-abb)
> Updated: 2026-09-18