# ABB E4H 4000 PR121 LSIG Circuit Breaker - 4000A 4 Pole

The **E4H 4000 PR121 LSIG** circuit breaker, manufactured by **ABB**, is a robust solution for managing and protecting electrical systems. Designed for industrial applications, this circuit breaker provides reliable performance and safety. It ensures the smooth operation of machinery and equipment by preventing overloads and short circuits.

This **4000A**, **4-pole** circuit breaker incorporates advanced features for optimal protection. It is engineered to meet the demands of high-current applications. The **LSIG** functionality offers enhanced protection against overloads, short circuits, and ground faults, making it a crucial component for any electrical infrastructure. Designed for durability and efficiency, the **E4H 4000 PR121 LSIG** ensures continuous operation and minimizes downtime.

-   **High Current Rating:** Handles up to **4000A**, suitable for demanding industrial applications.
-   **Advanced Protection:** Features **LSIG** protection for comprehensive system safeguarding.
-   **Durable Construction:** Built by **ABB** for long-lasting reliability and performance.
-   **Four Pole Design:** Ensures complete circuit protection and control.
-   **Easy Installation:** Designed for straightforward integration into existing electrical setups.

The **E4H 4000 PR121 LSIG** circuit breaker offers dependable protection for your valuable equipment. **ABB's** reputation for quality and innovation ensures that you are investing in a product that will deliver consistent performance. Integrate this circuit breaker into your industrial or automation system for enhanced safety and efficiency. For any inquiries, contact us at [info@ramautomations.com](mailto:info@ramautomations.com).

## Details

- **Price:** 999.0 USD
- **Vendor:** ABB
- **Type:** Industrial Automation > Circuit Breakers > Molded Case Circuit Breakers
- **Tags:** 4 pole circuit breaker, 4000A, ABB, circuit breaker, E4H 4000 PR121 LSIG, electrical protection, high current, industrial automation, LSIG protection, Ram Automations

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| New / 1SDA055530R1 | 999.00 USD | In stock |

## Images

- ABB E4H 4000 PR121 LSIG Circuit Breaker - 4000A 4 Pole-Ram Automations

---

> Source: [Ram Automations](https://ramautomations.com/products/abb-e4h-4000-pr121-lsig)
> Updated: 2026-09-18