3UN21-10-0AF7

Siemens 3UN21-10-0AF7 is a high-performance thermistor motor protection relay designed to safeguard motors from overheating and ensure reliable operation in various industrial applications. As part of Siemens’ extensive range of motor protection solutions, the Siemens 3UN21-10-0AF7 stands out for its robust construction, advanced features, and ease of use, making it an essential component for modern industrial systems.

Key Features:

• PTC Thermistor Tripping Unit: The Siemens 3UN21-10-0AF7 features a PTC thermistor tripping unit, which provides precise and reliable motor protection by detecting temperature changes and triggering a trip when necessary.
• Increased Interference Suppression: This relay is equipped with increased interference suppression, ensuring stable performance even in environments with high levels of electrical noise.

Highlights:

1. Manual Reset: The Siemens 3UN21-10-0AF7 includes a manual reset function, allowing operators to easily reset the relay after a trip, ensuring quick recovery and minimal downtime.
2. Monostable Design: The relay features a monostable design, which ensures that the relay remains in its default state until a trip condition is detected, providing reliable protection.
3. Dual LED Indicators: Equipped with two LED indicators, the Siemens 3UN21-10-0AF7 provides clear visual feedback on the relay’s status, making it easy to monitor and troubleshoot.
4. Wide Voltage Range: Operating on an AC voltage range of 110-120V at 50/60Hz, this relay is compatible with various power systems, ensuring versatile application.
5. Compact Dimensions: With dimensions of 1.0" x 4.0" x 4.0" (2.5 cm x 10.2 cm x 10.2 cm), the Siemens 3UN21-10-0AF7 is designed to fit easily into control panels, saving space and simplifying installation.

The Siemens 3UN21-10-0AF7 thermistor motor protection relay is engineered to deliver exceptional performance and reliability. Its advanced features, robust design, and user-friendly attributes make it a valuable addition to any industrial automation system.