SIEMENS
SIEMENS 3RU21161AB0 Overload Relay 1.1-1.6A 690V AC Trip Class 10
Thermal overload relay protects motors at 1.1 to 1.6 A with auto or manual reset, Trip Class 10 and 690 V AC rating
- Protects motors from overheating with thermal overload relay
- Handles 1.1 to 1.6 A current range for precise protection
- Rated for 690V AC maximum voltage in industrial circuits
- Trip Class 10 ensures fast response to overcurrent events
- Direct contactor mounting with screw terminals simplifies installation
Overload Relay 1.1-1.6A 690V AC
This Siemens 3RU21161AB0 overload relay protects motors with a thermal trip mechanism rated for 1.1 to 1.6 amperes. It operates at up to 690 volts AC and conforms to Trip Class 10 for standard starting duties. The unit mounts directly onto a compatible SIRIUS S00 contactor using screw terminals.
Industrial maintenance and panel builders
The relay suits three-phase circuits requiring adjustable thermal protection within the stated current window and an auxiliary contact block with one normally open and one normally closed contact. Installations needing a different current range, a higher trip class, electronic trip units, or a standalone DIN-rail mount should select another device.
Adjustable range 1.1-1.6A
The setting range of 1.1 to 1.6 amperes is the single figure that determines whether this relay matches the motor full-load current. Verify the nameplate value before ordering.
Highlights
- Protects motors from overheating with thermal overload relay
- Handles 1.1 to 1.6 A current range for precise protection
- Rated for 690V AC maximum voltage in industrial circuits
- Trip Class 10 ensures fast response to overcurrent events
- Direct contactor mounting with screw terminals simplifies installation
Specifications
| Brand | SIEMENS |
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Questions about this item
How do I mount the 3RU21161AB0 relay directly to a contactor and which step is often missed?
Align the relay with the contactor's S00 frame, secure the three screw terminals at 1.1–1.6 A range, then engage the mechanical latch — installers often forget the latch and the relay pulls loose under vibration.
What maintenance will the thermal units need after extended operation?
The three included thermal units are calibrated for Trip Class 10; inspect them after any overload trip and replace the full set if discoloration or calibration drift appears.
At what current does the 690 V AC relay reach its thermal limit during continuous running?
The maximum setting is 1.6 A; sustained loads above that value will cause the thermal elements to trip within the Class 10 time curve.
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