# ABB E4H-f 4000 PR121-P-LI 4000A 4p F HR Circuit Breaker

Introducing the robust **ABB E4H-f 4000 PR121-P-LI**, a high-performance 4-pole circuit breaker designed for demanding industrial automation applications. This **ABB circuit breaker** offers exceptional reliability and protection for electrical systems, ensuring operational continuity and safety. Its advanced design makes it suitable for integration into complex control systems, providing essential overcurrent and short-circuit protection. The **PR121-P-LI** model is engineered for efficiency and durability in challenging environments.

Engineered with precision, the **ABB E4H-f 4000** breaker operates seamlessly within sophisticated automation setups. It is built to withstand rigorous operational demands, making it a trusted component for safeguarding critical infrastructure. This **ABB 1SDA055520R1** unit is a testament to ABB's commitment to quality and innovation in electrical protection technology. Its features are optimized for high-capacity power distribution and control, ensuring consistent performance in industrial settings. Discover the difference superior engineering makes for your automation needs.

-   Superior **overcurrent and short-circuit protection** for industrial applications.
-   Durable construction ensuring **long-term reliability** in harsh environments.
-   Designed for seamless integration into **ABB automation systems** and control panels.
-   High performance with a **4000A current rating** and 4-pole configuration.
-   **Model PR121-P-LI** offers advanced trip unit functionality for precise protection.

The **ABB E4H-f 4000 PR121-P-LI** stands as a pinnacle of electrical safety and performance. Its robust build and advanced features make it an indispensable component for any serious industrial automation project. Trust in ABB for unparalleled protection and efficiency in your electrical infrastructure. Invest in reliability today.

## Details

- **Price:** 999.0 USD
- **Vendor:** ABB
- **Type:** Electrical > Circuit Breakers > Molded Case Circuit Breakers
- **Tags:** 1SDA055520R1, 4 pole circuit breaker, 4000A circuit breaker, ABB automation, ABB circuit breaker, E4H-f 4000, electrical protection, high current breaker, industrial automation, PR121-P-LI

## Variants

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

## Images

- ABB E4H-f 4000 PR121-P-LI 4000A 4p F HR Circuit Breaker-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/abb-e4h-f-4000-pr121-p-li-4000a-4p-hr)
> Updated: 2026-09-21