Technical illustration. Representative component image; exact configuration and appearance may vary. Images are for reference only. The supplied part’s appearance may differ.
1SAZ431201R1003 — Thermal overload relay
relayPart number: 1SAZ431201R1003
ABB TF140DU-135 (1SAZ431201R1003) is a three-pole thermal overload relay with a 100–135 A adjustable setting range and class 10A trip characteristic. It protects motors against overload and phase failure and features temperature compensation, selectable manual or automatic reset, test and stop functions, and trip indication.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ431201R1003 |
| Category | Electrical & controls |
| Time-Current Characteristic Curve | Tripping characteristic - Thermal overload relay TF140DU-135/TF140DU-135-V1000 |
| Product Net Width | 89 mm |
| Product Net Height | 140 mm |
| Product Net Depth / Length | 126 mm |
| Product Net Weight | 0.82 kg |
| Setting Range | 100–135 A |
| Rated Operational Voltage | Main circuit: 690 V AC; auxiliary circuit: 500 V AC / 440 V DC |
| Rated Operational Current (I e ) | 135 A |
| Rated Frequency (f) | Main and auxiliary circuits: DC, 50/60 Hz |
| Rated Impulse Withstand Voltage (U imp ) | Main circuit: 8 kV; 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 10 A; NO 6 A |
| Rated Operational Current AC-15 (I e ) | (120 V) NC 3 A |
| Rated Operational Current DC-13 (I e ) | (125 V) NC 0.25 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 16 ... 70 mm² |
| Tightening Torque | Auxiliary Circuit 0.8 ... 1.2 N·m |
| Wire Stripping Length | Auxiliary Circuit 9 mm |
| Mounting Position | any |
| Power Loss | at Rated Operating Conditions per Pole 2.3 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 6-2/0 AWG |
| Published component type | Thermal overload relay |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Trip Class | 10A |
| Auxiliary Contact Terminals | NC: 95–96; NO: 97–98 |
| Reset Mode | Selectable manual or automatic |
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 is the current setting range and trip class of ABB 1SAZ431201R1003?
The TF140DU-135 has an adjustable setting range of 100–135 A and a class 10A trip characteristic. Check the motor nameplate and starter design before choosing an overload relay.
Which contactors are listed for the TF140DU-135 overload relay?
ABB’s catalogue lists the TF140DU-135 for AF116–AF140 contactors. Confirm the complete contactor and equipment identification, including serial number where applicable, before ordering; this alone does not establish fitment in a particular assembly.
What do the auxiliary terminals on the TF140DU-135 do?
It has one normally closed auxiliary contact at terminals 95–96 and one normally open contact at 97–98. The relay changes their switching state when it trips; check the circuit-specific contact ratings before use.
Can the TF140DU-135 reset automatically after a trip?
Yes. Manual or automatic reset can be selected. It also provides test and stop functions and a trip indication; choose the reset mode to suit the equipment’s safety requirements.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.