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1SAZ721201R1033 — Thermal overload relay
relayPart number: 1SAZ721201R1033
ABB TF42-3.1 (1SAZ721201R1033) is an electromechanical thermal overload relay for motor overload and phase-failure protection. It has a 2.3–3.1 A adjustable setting range, class 10 trip characteristic, selectable manual or automatic reset, and NC trip and NO signal contacts. It connects directly to block contactors; a separate mounting kit is available.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1033 |
| Category | Electrical & controls |
| Ex Operating Instructions | ATEX - Operating instructions for thermal overload relay TF42 for potentially explosive areas |
| Time-Current Characteristic Curve | Tripping characteristic - Thermal overload relay TF42-3.1 |
| Product Net Width | 45 mm |
| Product Net Height | 88.3 mm |
| Product Net Depth / Length | 70.5 mm |
| Product Net Weight | 0.13 kg |
| Setting Range | 2.3–3.1 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 3.1 A |
| Rated Frequency (f) | Auxiliary Circuit 50 Hz |
| Rated Impulse Withstand Voltage (U imp ) | Auxiliary Circuit 6 kV |
| Rated Insulation Voltage (U i ) | 690 V |
| Number of Poles | 3P |
| 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 6 A |
| Rated Operational Current AC-15 (I e ) | (120 V) NC 3 A |
| Rated Operational Current DC-13 (I e ) | (125 V) NC 0.55 A |
| Degree of Protection | IP20 |
| Connecting Capacity Auxiliary Circuit | Flexible with Ferrule 1/2x 0.75 ... 2.5 mm² |
| Connecting Capacity Main Circuit | Flexible with Ferrule 1/2x 0.75 ... 4 mm² |
| Tightening Torque | Auxiliary Circuit 1 ... 1.2 N·m |
| Wire Stripping Length | Auxiliary Circuit 9 mm |
| Power Loss | at Rated Operating Conditions per Pole 1.1 ... 2.0 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 18-10 AWG |
| Published component type | Thermal overload relay |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Trip Class | Class 10 |
| Reset Mode | Selectable manual or automatic |
| Auxiliary Contacts | 1 normally closed trip contact and 1 normally open signal contact |
| Mounting | Direct connection to block contactors; separate mounting kit available |
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 current range and trip class does ABB 1SAZ721201R1033 have?
The TF42-3.1 has an adjustable current setting range of 2.3–3.1 A and a class 10 trip characteristic. Check the motor nameplate and protection requirements before selecting the relay.
What does the TF42-3.1 protect against?
This thermal overload relay is designed to protect a motor against overload and phase failure. Confirm the complete motor starter and its separate protective devices are appropriate for the installation.
Can the TF42-3.1 be reset manually or automatically?
Yes. Manual and automatic reset modes are selectable. The relay also has a trip indication, an NC trip contact, an NO signal contact and a STOP function.
How is the ABB TF42-3.1 mounted?
The relay connects directly to block contactors; a separate single-mounting kit is available as an accessory. For a particular machine, provide the contactor model and equipment serial number so suitability can be checked.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.