SIEMENS
SIEMENS 3RU21264AB0 Overload Relay 11-16 A 690 V AC
Thermal overload relay protects three-phase motors from 11 A to 16 A at 690 V AC with Trip Class 10
- Thermal overload protection from 11 A to 16 A
- Trip class 10 ensures fast response to overcurrent
- Direct contactor mounting saves panel space
- Screw terminals give secure wiring connections
- Rated for 690 V AC three-phase systems
SIEMENS 3RU21264AB0 Thermal Overload Relay
This SIEMENS 3RU21264AB0 is a thermal overload relay designed for three-phase motor protection in industrial control panels. It mounts directly onto compatible SIRIUS series contactors with frame size S0, providing adjustable overload protection for machinery and automation systems. The relay suits maintenance engineers and panel builders who need reliable current monitoring for motors operating up to 690 V AC.
Adjustable 11-16 A Trip Range with Class 10 Response
The critical specification is the adjustable current setting range of 11 A minimum to 16 A maximum with Trip Class 10 characteristic. This defines the motor full-load current the relay can protect and the time it takes to trip under overload conditions. Buyers must verify their motor nameplate current falls within this 11-16 A window; motors drawing less than 11 A or more than 16 A require a different relay.
Integrated Thermals and Dual Reset Modes Included
The relay ships with thermal units included, eliminating separate purchases for the sensing elements. It offers both automatic and manual reset options, allowing operators to choose between hands-free restart after cooling or deliberate manual intervention for safety-critical applications. The 1NO/1NC auxiliary contacts provide signalling flexibility for control circuits, while screw terminals accept standard wiring without special tools.
Highlights
- Thermal overload protection from 11 A to 16 A
- Trip class 10 ensures fast response to overcurrent
- Direct contactor mounting saves panel space
- Screw terminals give secure wiring connections
- Rated for 690 V AC three-phase systems
Specifications
| Brand | SIEMENS |
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Questions about this item
What does the 11-16 A current range mean when the relay is installed in a motor starter?
The relay protects motors drawing between 11 A and 16 A; you set the dial within that window and the thermal elements trip on sustained overload.
How does the 690 V AC rating limit the circuits this relay can be used on?
It allows use on three-phase supplies up to 690 V AC; do not apply it to higher voltage systems.
What contactor frames accept the direct-mount design of this S0 frame relay?
It mounts directly onto SIRIUS S0 contactors using the integrated screw terminals, no separate base required.
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