SIEMENS
SIEMENS 3RU21160JB0 Overload Relay 0.70-1 A Trip Class 10 690V AC
Thermal overload relay with 0.70-1 A range, trip class 10 and 690 V AC rating
- Thermal overload protection for motors up to 1 A
- Adjustable current range from 0.70 A to 1 A
- Trip Class 10 response limits nuisance tripping
- Rated for 690 V AC in three-phase circuits
- Direct contactor mounting with screw terminals for quick wiring
Overload Relay for Motor Protection
The SIEMENS 3RU21160JB0 is a thermal overload relay designed to protect three-phase motors from excessive current. It suits maintenance engineers and panel builders who need reliable overload protection in industrial control circuits.
Adjustable Range and Auxiliary Contacts
The relay offers an adjustable current setting from 0.70 A to 1 A, allowing precise matching to the motor load. Integrated 1NO/1NC auxiliary contacts provide status signalling for both tripped and healthy conditions, supporting automated monitoring and interlock logic without additional components.
Direct Contactor Mounting and Screw Terminals
Frame size S00 enables direct mounting onto compatible SIRIUS contactors, reducing panel space and assembly time. Screw terminals accept standard ferrules for secure wiring, while the dual auto and manual reset options let operators choose the restart method that fits the safety procedure. Trip Class 10 and a 690 V AC rating cover a wide range of industrial applications.
Highlights
- Thermal overload protection for motors up to 1 A
- Adjustable current range from 0.70 A to 1 A
- Trip Class 10 response limits nuisance tripping
- Rated for 690 V AC in three-phase circuits
- Direct contactor mounting with screw terminals for quick wiring
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
Will the thermal units inside the 3RU21160JB0 need periodic replacement?
The overload relay includes thermal units as standard. They are calibrated for the 0.70-1 A range and Trip Class 10, so replacement is only necessary after a trip event or if calibration drifts beyond specification.
At what current does the 3RU21160JB0 reach its maximum setting limit?
The maximum overload relay current setting is 1 A. Sustained loads above this value exceed the device's adjustment range and will cause a Trip Class 10 disconnection.
How much heat does the 3RU21160JB0 generate when running continuously at 690V AC?
As a thermal overload relay, heat output is proportional to the load current passing through its three poles. At the 1 A maximum setting, dissipation remains within IEC frame S00 limits for direct contactor mounting.
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