Siemens 3RB Overload Relay 1NO + 1NC, 4 A Contact Rating, 50 W, 230 Vac, 3P, SIRIUS

This overload relay is designed to provide effective electrical overload protection in various automation and electrical systems, primarily protecting motors and machinery from damage due to excessive current. Its robust construction ensures functionality in challenging environments, making it essential for professionals in automation and electrical sectors.

• Offers automatic, manual, and remote reset options for flexibility
• Includes 2 auxiliary contacts for enhanced functionality
• Operates with a control voltage of 230V AC for efficient performance
• Functions effectively within a temperature range of -25 to +60°C
• Utilises screw terminals for straightforward and secure connections

• Used in direct contactor relay systems for motor protection
• Ideal for machinery that requires high temperature overload protection
• Suitable for automation setups needing efficient electrical overload protection
• Designed for involving 3 pole relay configurations

It can be reset automatically, manually, or remotely based on your configuration.

It supports a contact current rating of up to 4A.

Yes, it is compatible with various motor types, providing appropriate overload protection.

Siemens 3RN1 Thermistor Relays

3RN1 thermistor relays are a range of thermal protection devices, which when used in conjunction with external PTC thermistors, offer temperature monitoring of electrical drives, transformers and other critical components such as bearings. The 3RN1 range operates on the principle of closed-circuit current and are therefore self monitoring in the event of sensor wire breakage.