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Siemens 3UN2110-0AB4 PTC Thermistor Tripping Unit

Siemens 3UN2110-0AB4 PTC Thermistor Tripping Unit for motor protection.

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ManufacturerSiemens

Part number3UN2110-0AB4

Type PTC Thermistor Tripping Unit

Interference Suppression Increased

Reset Manual

LEDs 2

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PTC Thermistor Monitoring Increased Interference Suppression Manual Reset Dual LED Status Indicators 1NO+1NC Output Contacts DC 24V Operation

Product description

The Siemens 3UN2110-0AB4 is a PTC (Positive Temperature Coefficient) thermistor tripping unit designed for motor protection. It features increased interference suppression for reliable operation in electrically noisy environments and a manual reset function. The unit is IP20 rated and includes two LEDs for status indication.

This tripping unit is commonly used in industrial applications to monitor the temperature of motor windings via PTC thermistors, preventing overheating and damage. It is suitable for use with DC 24V control circuits and provides one normally open (NO) and one normally closed (NC) contact for signaling or control purposes.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3UN2110-0AB4. Trust us for quality industrial automation components that ensure the longevity and safety of your equipment.

Technical specifications

Type	PTC Thermistor Tripping Unit
Interference Suppression	Increased
Reset	Manual
LEDs	2
Contacts	1NO + 1NC
Control Voltage	DC 24V
Protection Rating	IP20

Common applications

Motor Protection

Industrial Machinery

Pump Controls

Conveyor Systems

HVAC Systems

Manufacturing Equipment

Compatible systems

Standard PTC Thermistors DC 24V Control Circuits

Also known as

Siemens Motor Protection Relay, 3UN21100AB4, PTC Relay

Replaces / compatible with

The 3UN2110-0AB4 is a specific PTC thermistor tripping unit. It is designed to work with standard PTC thermistors for motor temperature monitoring.

Technical note

Expert tip

Ensure the connected PTC thermistors meet the Siemens specifications for resistance and response time for optimal motor protection.

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Frequently asked questions

What type of contacts does the Siemens 3UN2110-0AB4 tripping unit provide?

The Siemens 3UN2110-0AB4 PTC thermistor tripping unit provides one normally open (NO) and one normally closed (NC) output contact. These can be used for signaling fault conditions or integrating into control logic.