SIEMENS
SIEMENS 3RU21264BB0 Overload Relay 14-20 A 690 V AC Trip Class 10
Protects three-phase motors from 14 to 20 A at 690 V AC with Trip Class 10 thermal overload and auto or manual reset
- Thermal protection for 14–20 A motor circuits
- Trip Class 10 ensures fast overload response
- 690 V AC rating suits industrial power systems
- Direct contactor mounting simplifies panel assembly
- Auto and manual reset options give flexible recovery
SIEMENS 3RU21264BB0 Overload Relay
The SIEMENS 3RU21264BB0 is a thermal overload relay designed for three-phase motor protection in industrial control panels. It suits maintenance engineers and panel builders who need reliable overload monitoring for motors drawing between 14 A and 20 A at up to 690 V AC.
Direct contactor mounting with screw terminals
This unit mounts directly to a compatible SIRIUS contactor using a frame size S0 footprint, reducing panel wiring time. Screw terminals provide secure connections for power and auxiliary circuits, while the 1NO/1NC auxiliary contact block allows simple integration into control logic for trip signalling or interlocking.
Adjustable thermal units included
Thermal elements covering the 14 A to 20 A range are supplied with the relay, so no separate heater packs are required. The relay offers Trip Class 10 response and supports both automatic and manual reset modes, giving operators flexibility to match restart policies to the application.
Highlights
- Thermal protection for 14–20 A motor circuits
- Trip Class 10 ensures fast overload response
- 690 V AC rating suits industrial power systems
- Direct contactor mounting simplifies panel assembly
- Auto and manual reset options give flexible recovery
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
What voltage does the 690 V AC rating cap for this overload relay?
The 690 V AC maximum voltage rating caps the highest supply voltage the relay can safely monitor on three-phase circuits.
What contactor frame size must the relay mount to directly?
It mounts directly to SIRIUS series contactors with frame size S0 using the integrated direct-to-contactor mounting style.
How is the relay wired and what reset step is often missed?
Connect three conductors to the screw terminals, fit the three included thermal units, then select and set either auto or manual reset mode before commissioning.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
