# Siemens Circuit Breaker 5SL6640-7 40A 400V C-Curve 3+N Pole

Ensure robust electrical protection with the **Siemens CIRCUIT BREAKER 5SL6640-7** a high-performance miniature circuit breaker designed for industrial automation and commercial installations. This **Siemens 40A 400V C-Curve 3+N Pole** device offers reliable defense against overloads and short circuits safeguarding your critical equipment. Its advanced design and Siemens SENTRON engineering ensure consistent performance and longevity in demanding environments.

The **Siemens 5SL6640-7** provides essential circuit protection. What is the breaking capacity of this breaker It features a substantial **6 kA breaking capacity** ensuring safe interruption of fault currents. Is it suitable for three-phase systems Yes the **3+N pole configuration** offers complete protection for three-phase circuits including neutral switching. Its **C-curve tripping characteristic** is ideal for general-purpose loads and managing moderate inrush currents making it a versatile choice for various applications.

-   **Reliable Protection**: Offers dependable defense against overloads and short circuits with a 6 kA breaking capacity.
-   **Comprehensive Coverage**: Features a 3+N pole configuration for full three-phase system protection with neutral.
-   **Versatile Tripping**: C-curve characteristic suits general loads and moderate inrush currents.
-   **Easy Integration**: Compact modular design allows for simple DIN rail mounting in control panels and distribution boards.
-   **Durable Construction**: Built with industrial-grade thermoplastic for extended service life and stable operation.

Invest in the trusted reliability of Siemens for your electrical distribution needs. The **Siemens CIRCUIT BREAKER 5SL6640-7** is engineered for superior performance and peace of mind. Secure your essential systems today.

## Details

- **Price:** 999.0 USD
- **Vendor:** Siemens
- **Type:** Electrical Components > Circuit Protection > Miniature Circuit Breakers
- **Tags:** 3+n pole breaker, 400v circuit breaker, c-curve breaker, electrical protection, industrial automation, miniature circuit breaker, siemens 40a circuit breaker, siemens circuit breaker 5sl6640-7

## Variants

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

## Images

- Siemens CIRCUIT BREAKER 400V 6KA, 3+N-POLE, C, 40A 5SL6640-7

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> Source: [Ram Automations](https://ramautomations.com/products/siemens-circuit-breaker-5sl6640-7-40a)
> Updated: 2026-09-01