Need More Details?
If you’d like to check stock availability, request the latest price, or view more product images, simply click the "Request for Price" button and our team will assist you promptly.

Ensure reliable power protection with the Siemens 5SY4340-6 MCB a high-performance 3-phase circuit breaker designed for demanding industrial automation applications. This Siemens circuit breaker offers robust overcurrent and short-circuit protection safeguarding your valuable equipment and ensuring operational continuity. Its advanced design provides swift response times crucial for maintaining system integrity.
The Siemens 5SY4340-6 is engineered for seamless integration into modern control systems. It operates effectively within specified voltage and current parameters offering dependable circuit interruption. For professionals seeking robust protection solutions the Siemens 5SY4340-6 is an excellent choice for industrial power distribution and machinery safeguarding. Its construction prioritizes durability and long-term performance in challenging environments.
Brand Siemens
Part Number 5SY4340-6
Type Miniature Circuit Breaker (MCB)
Poles 3
Current Rating 40A
Voltage Rating Varies by specific model configuration typically for industrial use.
Invest in the trusted reliability of Siemens automation components. The Siemens 5SY4340-6 circuit breaker is ready to enhance the safety and efficiency of your industrial operations. Contact us today to secure this essential protection device.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.