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1SAZ721201R1013 — Thermal overload relay
relayPart number: 1SAZ721201R1013
ABB TF42-0.31 (1SAZ721201R1013) is a three-pole electromechanical thermal overload relay for motor protection against overload and phase failure. It has an adjustable 0.23–0.31 A setting range, class 10 tripping, selectable manual or automatic reset, and one normally closed and one normally open auxiliary contact. It connects directly to suitable block contactors; a separate mounting kit is available.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1013 |
| 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 TF42-0.31 |
| 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 | 0.23–0.31 A |
| Rated Operational Voltage | Auxiliary circuit: 600 V AC/DC; main circuit: 690 V AC, 600 V DC |
| Rated Operational Current (I e ) | 0.31 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 | 3 |
| 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 |
| Terminal 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 TF42-0.31 cover?
Its adjustable overload setting range is 0.23–0.31 A, with a rated operational current of 0.31 A. Check the motor nameplate and application before selecting the relay.
What protection does 1SAZ721201R1013 provide?
This class 10 thermal overload relay is designed to protect motors against overload and phase failure. Confirm the complete protection arrangement for the installation.
Can the TF42-0.31 be reset manually or automatically?
Yes. Manual or automatic reset can be selected. The relay also has a trip indication and a STOP function.
How is the TF42-0.31 mounted?
It connects directly to suitable block contactors; a separate mounting kit is available for independent mounting. Check the contactor model and equipment serial number to confirm the installation.
What auxiliary contacts are included on the TF42-0.31?
The relay 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.