Siemens 3TY7470-0A Main Contactor Kit

Product Description

The SIEMENS 3TY7470-0A is a main contactor kit designed as a replacement contact assembly for compatible Siemens contactor bodies. Contactor contact kits supply the primary switching contacts that carry load current when the contactor is energized. Over time, arcing and thermal cycling cause contact erosion, making replacement kits a standard service item rather than full-unit replacement. This kit is installed by licensed electricians and industrial maintenance technicians performing scheduled maintenance or unplanned repair on motor starters and contactors in electrical control panels. The kit ships as one assembly per pack and weighs 0.185 pounds.

This contact kit is suited for use in commercial and industrial electrical systems where Siemens contactor bodies of the compatible series are installed. Typical applications include motor control centers, HVAC equipment contactors, pump motor starters, and general-purpose load switching in industrial control panels. The compact form factor, measuring approximately 2.047 inches long by 1.929 inches wide by 2.874 inches tall, allows installation in space-constrained enclosures without modification to the existing contactor frame.

Key Features

• Replacement main contact assembly for compatible Siemens contactor bodies
• Compact dimensions: 2.047 inches x 1.929 inches x 2.874 inches
• Lightweight construction at 0.185 pounds
• Sold as one kit per pack for single-contactor service
• Restores full switching capacity without replacing the entire contactor body

Compatibility

Designed as an OEM-style replacement contact kit for compatible Siemens contactor frames. Verify the specific contactor series and frame size against Siemens documentation before ordering to confirm fitment.

Installation Notes

Installation should be performed by a qualified electrician. De-energize and lock out the circuit at the breaker or disconnect before beginning any work, following NFPA 70E arc flash and lockout/tagout procedures. Remove the existing worn contact assembly according to the contactor manufacturer's service instructions and install the replacement kit, ensuring all contact bridges seat fully and retaining hardware is properly secured. Verify correct operation with a continuity check before returning the circuit to service.

Technical Specifications

• Package Quantity: 1 per pack
• Weight: 0.185 pounds
• Length: 2.047 inches
• Width: 1.929 inches
• Height: 2.874 inches
• UPC: 75455420642

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3TY7470-0A