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Siemens 3TH8040-0B - Control Relay 10A 660V

Siemens
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Siemens 3TH8040-0B is a control relay designed for industrial automation and motor control applications. This compact relay is rated for 10 amperes at 660 volts AC maximum, providing reliable switching for control circuits. It features 4 fixed contacts with 4 normally open (NO) auxiliary contacts in a Size 0 frame, with a weight of 1.32 lb for space-efficient DIN rail mounting in control panels. The unit conforms to IEC 60947-5 and EN 50 011 standards, ensuring compatibility with global automation systems. Typical applications include medium-duty industrial control tasks in manufacturing and process automation environments.

Key Features & Specifications
  • Manufacturer: Siemens
  • Item Subcategory: Contactor
  • Weight: 1.32 lb
  • 4 Fixed Contacts
  • 4 NO Auxiliary Contacts
  • 10 Ampere Rating
  • 660 Volt AC Maximum
  • Size 0 Frame
  • DIN Rail Mount
  • Identification Number 40E
  • IEC 60947-5 Compliant
  • EN 50 011 Standard