3TF49 Contactor Kit

The 3TF49 contactor kit is a replacement main contact kit for Siemens 3TF49 contactors and compatible motor-control equipment. The commonly associated replacement part is 3TY7490-0A, which is identified as the main contact kit for the 3TF49.

Designed for contactor maintenance, the kit replaces the main contact components inside the 3TF49 rather than requiring replacement of the complete contactor. Available replacement kits are configured for the three main poles of the contactor.

Description

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Specifications

Item	Details
Part Number	3TY7490-0A
Product Type	Main Contact Kit
Compatible Contactor	Siemens 3TF49
Series	3TF / 3TY7
Number of Poles	3 Pole
Contact Components	3 Moving Contacts + 6 Fixed Contacts
Maximum Voltage	600 V
Current Rating	85 A

3TF49 Contactor Kit Replacement

When the main contacts of a 3TF49 contactor become worn after repeated switching, replacing the contact assembly can provide a practical maintenance solution. The 3TY7490-0A kit is specifically identified for the 3TF49 and is intended to rebuild the main contact section of the three-pole contactor.

Siemens 3TF49 Contact Kit

The Siemens 3TY7490-0A is listed as the main contact kit for the 3TF49 contactor. Replacement-part listings describe it as a complete kit containing three moving and six fixed contact components, allowing one 3TF49 three-pole contactor to be rebuilt.

Applications

The 3TF49 contactor kit is intended for maintenance and repair of Siemens 3TF49 contactors used in motor-control systems. The 3TF49 belongs to the Siemens 3TF series of AC contactors, and Siemens documentation identifies the 3TF49 as an AC contactor designed according to applicable IEC and DIN standards.

Why Replace the Contact Kit?

Main contacts are subject to electrical arcing, heat, and mechanical wear during normal switching. Once the contact surfaces deteriorate, replacing the worn components can restore the main switching assembly without replacing an otherwise serviceable contactor.

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