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Siemens 3TY7403-0AC0 Contactor Relay - 4-Pole Auxiliary

Siemens 3TY7403-0AC0 4-Pole Auxiliary Contactor Relay

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ManufacturerSiemens

Part number3TY7403-0AC0

Poles 4

Contact Configuration 4 NO (Normally Open)

Mounting Front Mount

Manufacturer Siemens

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Veteran-owned

CAGE: 9NK75

4 Normally Open Contacts Front Mountable Expands Contactor Functions Reliable Siemens Quality

Product description

The Siemens 3TY7403-0AC0 is a 4-pole auxiliary contactor relay. It is designed to be mounted on the front of Siemens contactors to expand their control circuitry capabilities. This unit provides four normally open (NO) auxiliary contacts.

This auxiliary contact block is commonly used in motor control circuits, control panels, and automation systems to add extra switching functions or signaling contacts to a main contactor. It is suitable for applications requiring additional control logic or status feedback.

Stanlo Automation, a veteran-owned distributor, offers the Siemens 3TY7403-0AC0. We provide reliable surplus industrial parts to ensure your automation projects are completed efficiently and cost-effectively.

Technical specifications

Poles	4
Contact Configuration	4 NO (Normally Open)
Mounting	Front Mount
Manufacturer	Siemens
Series	3TY

Common applications

Motor Control Circuits

Control Panels

Automation Systems

Electrical Control

Signaling

Compatible systems

Compatible with various Siemens contactors (refer to Siemens documentation for specific compatibility)

Also known as

Siemens 4 NO Auxiliary Contact 3TY Contactor Accessory Siemens Front Mount Relay

Replaces / compatible with

Used as an auxiliary contact module for compatible Siemens contactors to add additional switching capabilities.

Technical note

Expert tip

Ensure the main contactor is de-energized and properly isolated before installing or removing this auxiliary contact block.

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Frequently asked questions

What is the function of the Siemens 3TY7403-0AC0 auxiliary contact relay?

The Siemens 3TY7403-0AC0 provides four normally open (NO) contacts that can be added to a main Siemens contactor. These extra contacts are used for control logic, interlocking, or feedback signals in automation circuits.