# ABB E4V 4000 PR121 LSIG Circuit Breaker 4000A 3 Pole F HR

Ensure unparalleled electrical system protection with the **ABB E4V 4000 PR121 LSIG** circuit breaker. Designed for demanding industrial applications, this 4000A 3-pole unit offers robust **LSIG protection**, safeguarding your operations against long-time short-time instantaneous and ground faults. Its advanced design ensures reliability and safety.

Engineered for performance in challenging environments, the **F HR designation** signifies exceptional resilience against dust and moisture. This **ABB circuit breaker** integrates seamlessly into complex control systems and automation use scenarios. For industrial automation systems requiring dependable power distribution and fault management, the **E4V 4000 PR121 LSIG** is the definitive choice. What makes this breaker ideal for harsh conditions The F HR feature provides superior resistance to environmental factors.

-   **Robust LSIG protection** for comprehensive safety
-   High current rating of **4000A** for heavy-duty applications
-   Durable construction with **F HR** rating for harsh environments
-   Reliable performance backed by the trusted **ABB brand**
-   Compact design for easy installation in various automation use setups

This circuit breaker is built for sustained performance in critical industrial automation systems. Its advanced tripping mechanisms and durable components guarantee operational continuity.

## Details

- **Price:** 999.0 USD
- **Vendor:** ABB
- **Type:** Electrical Equipment > Circuit Breakers > Molded Case Circuit Breakers
- **Tags:** 3 pole breaker, 4000A circuit breaker, ABB, ABB electrical components, E4V 4000 PR121 LSIG, F HR rating, industrial automation, LSIG protection

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| New / 1SDA056914R1 | 999.00 USD | In stock |

## Images

- ABB E4V 4000 PR121 LSIG Circuit Breaker 4000A 3 Pole F HR-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/abb-e4v-4000-pr121-lsig-4000a-3p-f-hr)
> Updated: 2026-09-18