Technical illustration. Representative component image; exact configuration and appearance may vary. Images are for reference only. The supplied part’s appearance may differ.
1SAZ721201R1035 — Thermal overload relay
relayPart number: 1SAZ721201R1035
ABB 1SAZ721201R1035 is the TF42-4.2 thermal overload relay, with an adjustable 3.1–4.2 A setting range and class 10 trip rating. It provides motor overload and phase-loss protection, with selectable manual or automatic reset and one normally open and one normally closed auxiliary contact.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1035 |
| 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 TF42-4.2 |
| 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 | 3.1–4.2 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 4.2 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 |
| Auxiliary contacts | 1 normally open and 1 normally closed |
| 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 TF42-4.2 cover?
Its adjustable current setting range is 3.1–4.2 A. Compare this range with the motor nameplate and the starter design before selecting the relay.
Which contactors can the 1SAZ721201R1035 mount on?
The relay is listed for ABB AF09 through AF38 contactors and can mount directly to a matching contactor. Confirm the exact contactor reference and installation requirements before ordering.
What protection and trip class does the TF42-4.2 provide?
It is a class 10 thermal overload relay intended to protect motors against overload and phase failure.
Does the TF42-4.2 have automatic reset and auxiliary contacts?
It has selectable manual or automatic reset, one normally closed auxiliary contact and one normally open auxiliary contact. It also has test and stop controls.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.