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1SAZ721201R1023 — Thermal overload relay
relayPart number: 1SAZ721201R1023
ABB 1SAZ721201R1023 (TF42-1.0) is a thermal overload relay with an adjustable 0.74–1.0 A current range and class 10 tripping. It provides motor overload and phase-failure protection, with selectable manual or automatic reset, one normally closed trip contact and one normally open signal contact. It mounts directly on compatible ABB AF contactors; a separate mounting kit is available for standalone installation.
Looking for ABB 1SAZ721201R1023? This catalogue reference is listed under relay. Send the part number and your equipment details so we can confirm the specification, availability and a quotation including shipping.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1023 |
| 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 TF42-1.0 |
| 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 | 0.74–1.0 A |
| Rated Operational Voltage | Main circuit 690 V AC; auxiliary circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 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 Method | Selectable manual or automatic |
| Ambient Operating Temperature | −25 to +60 °C |
| Connection 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 current range does the ABB TF42-1.0 cover?
The 1SAZ721201R1023 has an adjustable overload current setting of 0.74–1.0 A and trip class 10. Check the motor nameplate and the protection requirements before selecting the relay.
Which contactors can the TF42-1.0 be mounted on?
The TF42-1.0 is listed for direct mounting on ABB AF09 to AF38 contactors. A separate mounting kit can be used for standalone mounting. Confirm the exact contactor and equipment details, including the serial number where applicable, before ordering.
Does the relay have manual and automatic reset?
Yes. The TF42-1.0 offers selectable manual or automatic reset, an NC trip contact, an NO signal contact and a trip indication.
What motor protection does the TF42-1.0 provide?
This class 10 thermal overload relay is designed to protect motors against overload and phase failure. Confirm that the relay and the rest of the protective equipment suit the motor and installation.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.