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Siemens 5ST3040 Undervoltage Release - 230V AC

Siemens 5ST3040 undervoltage release for circuit breakers, 230V AC.

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ManufacturerSiemens

Part number5ST3040

Voltage 230V AC

Terminals 6

Type Undervoltage Release

Compatibility 5SL4, 5SY, 5SP, 5SU1, 5SV Series

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Undervoltage Protection 230V AC Operation 6-Terminal Connection Remote Tripping on Low Voltage Compatible with Siemens Breakers

Product description

The Siemens 5ST3040 is an undervoltage release unit designed to operate with 230V AC. It features 6 terminals and is compatible with a range of Siemens miniature circuit breakers (5SL4, 5SY, 5SP) and RCBOs/FI circuit breakers (5SU1, 5SV). This device trips the circuit breaker when the supply voltage drops below a predetermined level, providing protection against undervoltage conditions.

This accessory is crucial for protecting machinery and systems from damage caused by low voltage, preventing restarts with insufficient power, and ensuring safe operation in industrial and commercial applications. It is a key component in safety circuits and power management systems.

Find the Siemens 5ST3040 undervoltage release at Stanlo Automation. As a veteran-owned surplus distributor, we ensure you get the parts you need to maintain your operational continuity.

Technical specifications

Voltage	230V AC
Terminals	6
Type	Undervoltage Release
Compatibility	5SL4, 5SY, 5SP, 5SU1, 5SV Series

Common applications

Industrial Machinery

Power Systems

Automation Control

Safety Circuits

Motor Protection

Compatible systems

Siemens 5SL4, 5SY, 5SP, 5SU1, 5SV breakers/RCBOs

Also known as

Siemens 5ST3040 Voltage Release 5ST3040 Under Voltage Trip

Replaces / compatible with

This undervoltage release is compatible with Siemens 5SL4, 5SY, 5SP, 5SU1, and 5SV series miniature circuit breakers and RCBOs.

Technical note

Expert tip

For 5SU1 series breakers, the 5ST3805-1 handle coupler is required for installation of the 5ST3040 undervoltage release.

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Frequently asked questions

What happens when the Siemens 5ST3040 undervoltage release detects low voltage?

When the supply voltage drops below the threshold of the Siemens 5ST3040 undervoltage release (rated for 230V AC), it will trip the associated miniature circuit breaker or RCBO to disconnect power.