Technical illustration. Representative component image; exact configuration and appearance may vary. Images are for reference only. The supplied part’s appearance may differ.
1SAZ721201R1028 — Thermal overload relay
relayPart number: 1SAZ721201R1028
ABB 1SAZ721201R1028 (TF42-1.7) is a thermal overload relay with an adjustable 1.3–1.7 A setting range and trip class 10. It provides motor overload and phase-failure protection, with selectable manual or automatic reset and one normally open and one normally closed auxiliary contact.
Looking for ABB 1SAZ721201R1028? 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.
Availability on request
Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1028 |
| 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 TF42-1.7 |
| 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 | 1.3–1.7 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 1.7 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 | 10 |
| Reset method | Selectable manual or automatic |
| Main circuit connection | 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 ABB 1SAZ721201R1028 cover?
The TF42-1.7 has an adjustable overload setting range of 1.3–1.7 A. Check the motor nameplate current and the application requirements before selecting the relay.
Which contactors can the TF42-1.7 mount on?
The TF42-1.7 is listed for ABB AF09–AF38 contactors. Confirm the complete contactor model and, where relevant, equipment serial number before ordering; a separate mounting kit is needed for standalone mounting.
What protection and trip class does the TF42-1.7 provide?
This thermal overload relay provides motor overload and phase-failure protection with trip class 10. Check the complete motor-starter design for the required short-circuit protection.
Does the TF42-1.7 have manual or automatic reset and auxiliary contacts?
It offers selectable manual or automatic reset and has one normally closed trip contact and one normally open signal contact.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.