Siemens 3RU21264FB0 34-40A Thermal Overload Relay

Siemens 3RU21264FB0 34-40A Thermal Overload Relay

The Siemens 3RU21264FB0 is a thermal overload relay designed to protect three-phase motors from overloads and phase failures. It automatically disconnects the motor when excessive current is detected, preventing potential damage. This relay is part of the SIRIUS 3RU2 series and is optimized for use with Siemens 3RT contactors.

Key Features:

Current Range: Adjustable from 34 to 40 amps

Trip Class: Class 10 — trips within approximately 10 seconds during overload

Reset Options: Manual and automatic reset capabilities

Auxiliary Contacts: 1 normally open (NO) and 1 normally closed (NC)

Mounting: Designed to mount directly onto Siemens 3RT2026, 3RT2027, or 3RT2028 contactors (Size S0)

Terminal Type: Screw terminals for both main and auxiliary circuits

Protection Rating: IP20 (finger-safe)

Operating Temperature Range: –20°C to +70°C

Dimensions: Approximately 85 mm (H) x 45 mm (W) x 85 mm (D)

Weight: Around 0.44 lbs (0.2 kg)