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1SAZ721201R1049 — Thermal overload relay
relayPart number: 1SAZ721201R1049
ABB 1SAZ721201R1049 is the TF42-20 thermal overload relay, with a 16–20 A adjustable current range and class 10 trip characteristic. It provides motor overload and phase-failure protection and features temperature compensation, selectable manual or automatic reset, an NC trip contact, an NO signal contact and trip indication.
Looking for ABB 1SAZ721201R1049? 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 | 1SAZ721201R1049 |
| 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 TF42-20 |
| Product Net Width | 45 mm |
| Product Net Height | 88.3 mm |
| Product Net Depth / Length | 70.5 mm |
| Product Net Weight | 0.135 kg |
| Setting Range | 16–20 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 20 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 1.8 ... 2.6 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 |
| Main Circuit Connection | Screw connection |
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
Is ABB 1SAZ721201R1049 the TF42-20, and what is its current setting range?
Yes. ABB reference 1SAZ721201R1049 identifies the TF42-20 thermal overload relay, with an adjustable current range of 16–20 A. Check the motor nameplate current and application requirements before selection.
What motor protection and trip class does the TF42-20 provide?
The TF42-20 is a class 10 thermal overload relay intended to protect motors against overload and phase failure. It is not a substitute for a properly selected short-circuit protective device.
Can the TF42-20 mount directly to an ABB contactor?
The TF42-20 is listed for AF09 to AF38 series contactors and is designed for direct attachment. Separate mounting kits are also available. Confirm the exact contactor configuration and equipment details before ordering.
Does the TF42-20 offer manual and automatic reset?
Yes. The relay offers selectable manual or automatic reset, an NC trip contact, an NO signal contact, a STOP function and trip indication.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.