Siemens 3RU21261EB0 2.8 - 4.0A Class 10 Thermal Overload Relay

Siemens 3RU21261EB0 2.8-4.0A Class 10 Overload Relay

The 3RU21261EB0 from Siemens is a compact and reliable thermal overload relay designed to protect motors from overheating and phase failure. It works with 3-phase motors and is commonly used with Siemens S0 size contactors.

Key Features:

Current Range: Adjustable from 2.8 to 4 amps

Protection Type: Class 10 overload protection (trips in ~10 seconds under overload)

Compatible With: Siemens 3RT202x S0 contactors

Reset Options: Manual or automatic reset with a built-in test and stop button

Mounting: Directly mounts onto the contactor or panel

Voltage Rating: Up to 690V AC

Built-In Safety: Includes phase failure protection and visible trip indication

Common Uses:

Industrial motor starters

HVAC systems

Automation panels

Pumps, fans, and compressors