The Siemens 3RT2017-1AN21 is a contactor from the Siemens Sirius line of contactors. It is designed for controlling electric motors and other electrical loads. Here are some details about this specific contactor:

Product Name: Siemens 3RT2017-1AN21

Catalog Number: 3RT20171AN21

Description: Contactor

Coil Voltage: 110-127 V AC

Number of Main Contacts: 3 normally open (N/O) contacts

AC-1 Ratings: 20 A

AC-3 Ratings: 9 A

Mounting: DIN rail mountable

Auxiliary Contacts: 1 normally open (N/O) auxiliary contact, 1 normally closed (N/C) auxiliary contact

Size: S2 size (45 mm width)

Standards: IEC rated, UL listed

The contactor is equipped with a coil that, when energized, pulls in the contacts, allowing current to flow through the main contacts. It can be controlled using a control circuit such as a motor starter or a control relay.

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