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Siemens 3TH4373-0LC8 Contactor Relay - 33V DC, 7 NO / 3 NC, Varistor

Siemens 3TH4373-0LC8 Contactor Relay, 7 NO/3 NC, 33V DC, Varistor.

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ManufacturerSiemens

Part number3TH4373-0LC8

Manufacturer Siemens

Part Number 3TH4373-0LC8

Series 3TH43

Rating 70E

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7 Normally Open Contacts 3 Normally Closed Contacts Screw Terminal Connections 33V DC Coil Voltage Integrated Varistor for Surge Protection EN 50011 Compliant

Product description

The Siemens 3TH4373-0LC8 is a 70E series contactor relay designed for DC operation. It is equipped with 7 normally open (NO) and 3 normally closed (NC) contacts, featuring screw terminals. The coil operates at 33V DC, and this model includes an integrated varistor for protection against voltage surges.

This contactor relay is suitable for demanding industrial applications where reliable DC switching and surge protection are required. Its 7 NO/3 NC configuration offers flexibility in complex control systems for machinery and automation equipment.

Stanlo Automation, a veteran-owned surplus parts distributor, is your reliable source for industrial automation components. We offer competitive pricing and quick shipping on parts like the Siemens 3TH4373-0LC8, ensuring you get the operational continuity you need.

Technical specifications

Manufacturer	Siemens
Part Number	3TH4373-0LC8
Series	3TH43
Rating	70E
Contacts	7 NO + 3 NC
Terminals	Screw
Coil Voltage	33V DC
Operation	DC Operation
Features	Integrated Varistor
Standard	EN 50011

Common applications

DC Control Systems

Industrial Automation

Motor Control

Automation Panels

Systems Requiring Surge Suppression

Complex Switching Applications

Compatible systems

DC control circuits requiring 33V DC switching EN 50011 compatible systems needing surge suppression

Also known as

Siemens 3TH4373-0LC8 Siemens Contactor Relay 70E Siemens 33V DC Relay with Varistor

Replaces / compatible with

A suitable replacement for Siemens 70E series DC contactor relays, particularly where integrated overvoltage protection is advantageous. Compatible with EN 50011 standards.

Technical note

Expert tip

The integrated varistor on the 3TH4373-0LC8 is effective for common voltage transients; however, systems prone to severe electrical disturbances may require additional external surge protection.

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Frequently asked questions

Does the Siemens 3TH4373-0LC8 have surge protection?

Yes, the Siemens 3TH4373-0LC8 features an integrated varistor. This component provides protection against transient voltage spikes, enhancing the reliability and lifespan of the relay in industrial environments.