Siemens 3RU21261DB0 2.2-3.2A Class 10 Therma Overload Relay

Siemens 3RU21261DB0 2.2-3.2A Class 10 Overload Relay

Overview:
The Siemens 3RU2126‑1DB0 is a thermal overload relay designed to protect small three-phase motors from overload, phase loss, and phase imbalance. It is part of the SIRIUS 3RU2 series and is compatible with Siemens size S0 contactors.

Key Specifications:

Current Setting Range: 2.2 – 3.2 A

Trip Class: Class 10 (trips within 10 seconds under overload conditions)

Reset Options: Manual or automatic reset

Mounting: Directly mounts onto Siemens 3RT202 series size S0 contactors

Protection Rating: IP20 (finger-safe housing)

Operating Temperature Range: –40 °C to +70 °C

Terminals: Screw terminals for both main and auxiliary circuits

 

Features:

Provides reliable protection against motor overloads and phase failures

Compact design suitable for space-constrained installations

Easy integration with Siemens SIRIUS contactors

Includes test, stop, and reset buttons for convenient operation

 

Applications:

Ideal for protecting small motors in applications such as:

HVAC systems

Pumps and compressors

Conveyor systems

Small machinery