TA25DU-14M overload relay: motor setting, contactor fit and reset mode
The ABB TA25DU-14M is a three-pole thermal overload relay with a 10.0–14.0 A setting range and class 10A trip characteristic. ABB lists order code 1SAZ211201R2045 and one normally closed plus one normally open auxiliary contact. It provides overload and phase-failure protection functions when correctly matched to the motor and contactor assembly.
Key technical data
| Technical item | Verified value / selection note |
|---|---|
| Type designation | TA25DU-14M |
| ABB order code | 1SAZ211201R2045 |
| Setting range | 10.0–14.0 A |
| Trip class | 10A |
| Main poles | 3 |
| Auxiliary contacts | 1 NC and 1 NO |
| Reset and controls | Manual/automatic reset selection, STOP and TEST functions |
The table summarizes family or catalog values for identification and initial selection. Confirm the nameplate, environmental limits, standards, revision and options for the exact device before procurement or engineering approval.
Application and system selection
Set the relay to the motor nameplate current and confirm its trip class matches the motor’s starting time and thermal withstand. The relay is intended to mount with compatible contactors; check the starter combination and any single-mounting kit required by the panel layout. Determine whether automatic or manual reset is appropriate for the machinery risk.
Configuration and compatibility
Verify contactor frame compatibility, auxiliary contact logic, supply voltage, ambient compensation and short-circuit coordination. Do not select by nominal current alone if the motor has a long acceleration profile or frequent starts. Confirm the device’s reset setting and the control-circuit response to trip before commissioning.
Related models and order-code references
The following designations are related catalog references, not automatic substitutes. Check each complete code, rating, connection, revision and application requirement before selecting a variant.
- TA25DU-11M
- TA25DU-14M 1SAZ211201R2045
- TA25DU-19M
- TA25DU-25A
- TA25DU-25M
- TA25DU-25M (18.0–25A)
- TA25DU-3.1M
- TA25DU-32M
- TA25DU-5.0M (3.5–5.0A)
- TA25DU-6.5M
- TA25DU-6.5M 1SAZ211201R2038
- TA25DU0.63
- TA25DU1410-14A
- TA25DU19
- TA25DU2518-25A
- TA25DU3224-32A
Installation and commissioning
Mount the relay directly to the approved contactor or adapter, wire the trip contacts into the control circuit and set the dial to the motor’s rated current. Test STOP, TEST and reset functions with the load safely isolated. Confirm the trip signal removes the intended control command and document the final setting.
Replacement and procurement information
For a quotation or replacement review, provide the complete designation TA25DU-14M, the order code where applicable, serial or hardware revision, quantity, operating environment, connected equipment and required delivery date. Include a legible nameplate image and relevant wiring, loop or switchgear drawing so the exact interface and configuration can be checked.
Ask the supplier to confirm accessories, revision compatibility and any approved successor in writing. Do not select solely from a family name or product photograph. Follow the current ABB installation and safety instructions for the exact unit.
