Siemens 5SY4640-7 Miniature circuit breaker

The C-curve is suitable for inductive loads such as motors, small transformers, and lighting circuits with occasional inrush currents. The 3+N-pole configuration ensures comprehensive protection across all three phases and the neutral, making it particularly suitable for three-phase four-wire systems. Its high 10 kA short-circuit breaking capacity guarantees quick interruption during fault conditions, helping to protect downstream equipment and maintain electrical safety.

Commonly used in industrial automation systems, control panels, and commercial distribution boards, this breaker is ideal for environments where safety and continuous operation are critical. Compliant with IEC standards, the 5SY4640-7 ensures reliable performance, long service life, and high mechanical endurance, making it a dependable solution for modern electrical infrastructure.

Miniature circuit breaker 400 V 10kA, 3+N-pole, C, 40A, D=70 mm

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FAQ

1.Q:Other suppliers have a better price than yours?

A: ''To create the greatest benefit for clients'' is our belief, if you have a better price, please let Wusu know. We will try the best to meet your target price and support you.

2.Q:What's the delivery time ?

A: Normally we have enough stock for regular models(such as PLC FX3U-64MR/ES-A ) and we can deliver immediately at the same day after payment received. For some products that is not in stock, we normally deliver within one week.

3.Q:What is the standard of package?

A: Export standard package or special package according to customer requirement.

4.Q: Could Wusu provide technology support?

A: We're in this field for more than 15 years and we have our own technical team. Our engineer could give suggestion and help to solve the problem if there's any problem.

5.Q:Does Wusu keeps goods in stock or only trading?

A: We have warehouses in Guangzhou and HongKong and keep large stock of goods in it, that's how we promise fast delivery.

All products are covered by the Wusu Industrial Automation Company's 1 Year Warranty. Manufacturer's Warranty does not apply.

 Refund and replacement

1. Please contact us within 7 days if you have any question after you receiving the items.

2.The returned items has to be in its original condition, specific reason for the return, we will 

issue a return or replacement for your order after we received the returns.

3.The buyer is responsible for all the shipping cost incurred.