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1SAZ211201R2051 — Thermal overload relay
relayPart number: 1SAZ211201R2051
ABB 1SAZ211201R2051 (TA25DU-25M) is a three-pole thermal overload relay for motor overload and phase-failure protection. It has an 18–25 A adjustable current range, trip class 10A, temperature compensation, one NC trip contact and one NO signal contact. It offers selectable manual or automatic reset, STOP and TEST functions and trip indication.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ211201R2051 |
| Category | Electrical & controls |
| Time-Current Characteristic Curve | Tripping characteristic - Thermal overload relay TA25DU-25, TA25DU-25 V1000 |
| Product Net Width | 44 mm |
| Product Net Height | 80 mm |
| Product Net Depth / Length | 94 mm |
| Product Net Weight | 0.17 kg |
| Rated Operational Voltage | Main circuit: 690 V AC; 440 V DC |
| Rated Operational Current (I e ) | 25 A |
| Rated Frequency (f) | Main and auxiliary circuits: 50 Hz, 60 Hz and DC |
| Number of Poles | 3 |
| Number of Auxiliary Contacts NC | 1 |
| Number of Auxiliary Contacts NO | 1 |
| Number of Protected Poles | 3 |
| Conventional Free-air Thermal Current (I th ) | Auxiliary Circuit NC 5 A |
| Rated Operational Current AC-15 (I e ) | (120 V) NC 3 A |
| Degree of Protection | Housing IP20; main circuit terminals IP10 |
| Connecting Capacity Auxiliary Circuit | Flexible 1/2x 0.75 ... 2.5 mm² |
| Connecting Capacity Main Circuit | Flexible with Ferrule 1x 0.75 ... 4 mm² |
| Wire Stripping Length | Auxiliary Circuit 9 mm |
| Power Loss | at Rated Operating Conditions per Pole 1.5 ... 2.9 W |
| Maximum Operating Voltage UL/CSA | Main Circuit 600 V AC |
| Contact Rating UL/CSA | (NC:) B600 |
| Connecting Capacity Main Circuit UL/CSA | Flexible 1/2x 16-8 AWG |
| Connecting Capacity Auxiliary Circuit UL/CSA | Flexible 1/2x 18-14 AWG |
| Tightening Torque UL/CSA | Auxiliary Circuit 12 in·lb |
| Ambient Air Temperature | Operation -25 ... +55 °C |
| Maximum Operating Altitude Permissible | 2000 m |
| Resistance to Shock acc. to IEC 60068-2-27 | 25g 2 shocks 13 ms |
| Published component type | Thermal overload relay |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Extended product type | TA25DU-25M |
| Overload current setting range | 18–25 A |
| Trip class | 10A |
| Reset mode | Selectable manual or automatic |
| Terminal Type | Screw terminals |
Catalogue information may contain errors or be out of date. Full specifications and verified details are available on request. Confirm the part number and equipment fitment with us before ordering.
Product questions
What is the adjustment range and trip class of ABB 1SAZ211201R2051?
The TA25DU-25M has an adjustable overload current range of 18–25 A and trip class 10A. Check the motor nameplate and application requirements before selecting the relay.
What motor protection does the TA25DU-25M provide?
This thermal overload relay is designed to protect motors against overload and phase failure. Confirm the complete protection arrangement for the installation separately.
What contacts and reset options are provided?
It has one normally closed trip contact and one normally open signal contact. Manual or automatic reset can be selected; STOP, TEST and trip indication are also provided.
What voltage and dimensions should be checked before ordering?
The main circuit is rated 690 V AC and 440 V DC; the UL/CSA maximum is 600 V AC. Net dimensions are 44 mm wide, 80 mm high and 94 mm deep. Verify the complete installation requirements before ordering.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.