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Siemens 3TH4271-0LC8 7 NO + 1 NC Contactor Relay - DC Operation

Siemens 3TH4271-0LC8 DC Contactor Relay with varistor protection.

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ManufacturerSiemens

Part number3TH4271-0LC8

Type Contactor Relay

Manufacturer Siemens

Part Number 3TH4271-0LC8

Coil Voltage 33 V DC

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7 Normally Open Contacts 1 Normally Closed Contact 33V DC Coil Voltage Integrated Varistor for Surge Suppression Screw Terminal Connections EN 50011 Compliant

Product description

The Siemens 3TH4271-0LC8 is a DC-operated contactor relay designed for reliable switching in automation systems. It features 7 normally open (NO) and 1 normally closed (NC) contacts, screw terminal connections, and a DC coil voltage of 33V. This model includes an integrated varistor for surge suppression, enhancing its durability and protection in demanding environments.

This relay is suitable for various DC control applications, including motor starters, control circuits, and automation tasks where stable DC switching is essential. The varistor protection makes it particularly useful in environments prone to voltage fluctuations.

Stanlo Automation, a veteran-owned supplier, offers the Siemens 3TH4271-0LC8 and a wide range of other industrial surplus parts. We provide quality components with fast shipping to meet your operational needs.

Technical specifications

Type	Contactor Relay
Manufacturer	Siemens
Part Number	3TH4271-0LC8
Coil Voltage	33 V DC
Contacts	7 NO + 1 NC
Terminal Type	Screw Terminal
Protection	Varistor
Standard	EN 50011

Common applications

DC Control Circuits

Automation Systems

Motor Control

Industrial Automation

Relay Logic

Power Management

Compatible systems

DC control panels Automation systems Industrial machinery PLC output modules

Also known as

Siemens Contactor Relay 3TH4271-0LC8 3TH4271-0LC8 Relay Siemens DC Contactor Relay

Replaces / compatible with

This part is designed to meet specific EN 50011 standards for control relays in DC applications.

Technical note

Expert tip

The 33V DC coil is sensitive to overvoltage; the integrated varistor offers some protection, but it's crucial to ensure the supply voltage remains within specified limits for optimal performance.

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Frequently asked questions

What is the purpose of the varistor in the Siemens 3TH4271-0LC8 contactor relay?

The integrated varistor in the Siemens 3TH4271-0LC8 acts as a surge suppressor. It helps protect the relay's coil from voltage spikes and transients, improving its lifespan and reliability in demanding electrical environments.