Siemens 3RU21261FB0 3.5-5A Thermal Overload Relay

Siemens 3RU21261FB0 3.5-5A Thermal Overload Relay 

The 3RU21261FB0 is a thermal overload relay designed to protect small 3-phase motors from overheating and power loss. It works with Siemens S0 contactors and is easy to install in control panels.

Key Features

Adjustable Current Range: 3.5 to 5 amps

Trip Class: Class 10 (trips in about 10 seconds during overload)

Reset Options: Manual or automatic reset with test and stop button

Mounting: Directly mounts to Siemens 3RT S0 contactors or panel

Voltage Rating: Up to 690V AC

Operating Temperature: - 40 °C to +70 °C

Benefits

Protects motors from damage caused by overload or phase failure

Compact design saves space in panels

Easy to reset, test, and monitor

Works globally with certifications like UL, CSA, and IEC

Common Uses

Motor control panels

HVAC systems

Pumps, fans, and industrial machines