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1SAZ721201R1053 — Thermal overload relay
relayPart number: 1SAZ721201R1053
ABB 1SAZ721201R1053 is the TF42-35 thermal overload relay, with an adjustable 29–35 A setting range and class 10 trip characteristic. It provides motor overload and phase-failure protection and includes selectable manual or automatic reset, trip indication, and normally closed trip and normally open signal contacts.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1053 |
| 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 TF42-35 |
| Product Net Width | 45 mm |
| Product Net Height | 88.3 mm |
| Product Net Depth / Length | 70.5 mm |
| Product Net Weight | 0.145 kg |
| Setting Range | 29–35 A |
| Rated Operational Voltage | Main circuit: 690 V AC; auxiliary circuit: 600 V AC/DC |
| Rated Operational Current (I e ) | 35 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 2.5 ... 10 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 2.1 ... 2.8 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 14-6 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 |
| Ambient operating temperature | −25 to +60 °C |
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 and trip class does ABB 1SAZ721201R1053 have?
The TF42-35 has an adjustable overload setting range of 29–35 A and a class 10 trip characteristic. Check the motor and starter requirements before selecting the relay.
What protection does the TF42-35 provide?
This thermal overload relay is intended to protect motors against overload and phase failure. Confirm the complete protection arrangement for the installation separately.
Does the TF42-35 have automatic and manual reset?
Yes. The relay offers selectable automatic or manual reset, a trip indication and a STOP function.
What auxiliary contacts are provided on the TF42-35?
It has one normally closed trip contact and one normally open signal contact for the control and signalling circuits.
Can the TF42-35 be mounted separately from a contactor?
The relay mounts directly to suitable block contactors; a separate mounting kit is available as an accessory. Confirm the exact contactor and mounting arrangement before ordering.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.