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Siemens 3TY2781-2C Auxiliary Switch Block (2 NO + 2 NC)

Siemens 3TY2781-2C auxiliary switch block, 2 NO + 2 NC, left mount.

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ManufacturerSiemens

Part number3TY2781-2C

Type Auxiliary Switch Block

Contacts 2 NO + 2 NC

Mounting Left side

Manufacturer Siemens

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Veteran-owned

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2 Normally Open contacts 2 Normally Closed contacts Left-side mounting Extends contactor functionality Reliable Siemens quality

Product description

The Siemens 3TY2781-2C is an auxiliary switch block featuring 2 normally open (NO) and 2 normally closed (NC) contacts. This block is designed for left-side mounting on compatible Siemens contactors, providing additional signaling or control functions.

Auxiliary switches are essential for monitoring the status of a contactor or for implementing control logic. The 2 NO and 2 NC configuration of the 3TY2781-2C allows for versatile integration into control circuits, status feedback, interlocks, and remote indication in industrial automation, motor control, and building management systems.

Stanlo Automation, a veteran-owned surplus distributor, provides genuine industrial automation parts. Secure your Siemens 3TY2781-2C auxiliary switch block from Stanlo and leverage our commitment to quality and cost-effective solutions for your automation projects.

Technical specifications

Type	Auxiliary Switch Block
Contacts	2 NO + 2 NC
Mounting	Left side
Manufacturer	Siemens

Common applications

Motor control circuits

Status feedback

Interlocking logic

Control panels

Automation systems

Building automation

Compatible systems

Compatible Siemens contactors supporting left-side auxiliary switch mounting

Also known as

Siemens 3TY2781-2C Aux Switch Contactor Auxiliary Contacts Siemens 2NO2NC Switch Block

Replaces / compatible with

Replacement auxiliary switch block for Siemens contactors that support left-side mounting of 2 NO + 2 NC configurations.

Technical note

Expert tip

Ensure the contactor is de-energized before mounting or dismounting the auxiliary switch block. Verify alignment with the contactor's operating mechanism.

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Frequently asked questions

What is the contact configuration of the Siemens 3TY2781-2C auxiliary switch block?

The Siemens 3TY2781-2C auxiliary switch block features a configuration of 2 normally open (NO) contacts and 2 normally closed (NC) contacts. It is designed for left-side mounting on compatible Siemens contactors.