Official DistributorBy ABB
SKU
MPN
1SAZ741201R1038
Weight
0.13 kg
The TF42-B thermal overload relays are economic electromechanical protection devices for the main circuit, complying with the latest railway rolling stock standards and allowing installation in passengers or driver cabins for trains frequently operating tunnels or undergrounds.
They offer a reliable protection for motors in the event of overload or phase failure. The devices have trip
class 10.
The thermal overload relays are three pole relays with bimetal tripping elements. The motor current flows
through the bimetal tripping elements and heats them directly and indirectly. In case of an overload (over
current), the bimetal elements bent as a result of the heating. This leads to a release of the relay and a
change of the contacts switching position (95-96 / 97-98).
– Manual or automatic reset selectable
– Phase loss sensitive acc. to IEC/EN 60947-4-1
– TEST and STOP function – Trip indication on the front
– Temperature compensation
– Suitable for three- and single-phase applications
– designed in accordance to the applicable parts of IEC 60077 standard
– shocks and vibration withstand conforming to IEC 61373 (category 1, class B)
– usable according to European fire and smoke safety standard EN 45545-2
Technical Specifications
Dimensions
| Product Net Width | 45 mm |
| Product Net Height | 88.3 mm |
| Product Net Depth / Length | 70.5 mm |
| Product Net Weight | 0.13 kg |
Technical
| Setting range | 4.2 ... 5.7 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Voltage | Main Circuit 690 V AC |
| Rated Operational Current (Ie) | 5.7 A |
| Rated Frequency (f) | Auxiliary Circuit 50 Hz |
| Rated Frequency (f) | Auxiliary Circuit 60 Hz |
| Rated Frequency (f) | Auxiliary Circuit DC |
| Rated Frequency (f) | Main Circuit 50 Hz |
| Rated Frequency (f) | Main Circuit 60 Hz |
| Rated Impulse Withstand Voltage (Uimp) | Auxiliary Circuit 6 kV |
| Rated Impulse Withstand Voltage (Uimp) | Main Circuit 6 kV |
| Rated Insulation Voltage (Ui) | 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 (Ith) | Auxiliary Circuit NC 6 A |
| Conventional Free-air Thermal Current (Ith) | Auxiliary Circuit NO 4 A |
| Conventional Free-air Thermal Current (Ith) | Main Circuit 0 A |
| Rated Operational Current AC-15 (Ie) | (120 V) NC 3 A |
| Rated Operational Current AC-15 (Ie) | (120 V) NO 0.75 A |
| Rated Operational Current AC-15 (Ie) | (240 V) NC 3 A |
| Rated Operational Current AC-15 (Ie) | (240 V) NO 0.75 A |
| Rated Operational Current AC-15 (Ie) | (400 V) NC 0.75 A |
| Rated Operational Current AC-15 (Ie) | (400 V) NO 0.75 A |
| Rated Operational Current AC-15 (Ie) | (500 V) NC 0.75 A |
| Rated Operational Current AC-15 (Ie) | (500 V) NO 0.75 A |
| Rated Operational Current DC-13 (Ie) | (125 V) NC 0.55 A |
| Rated Operational Current DC-13 (Ie) | (125 V) NO 0.55 A |
| Rated Operational Current DC-13 (Ie) | (24 V) NC 1.25 A |
| Rated Operational Current DC-13 (Ie) | (24 V) NO 1.25 A |
| Rated Operational Current DC-13 (Ie) | (250 V) NC 0.27 A |
| Rated Operational Current DC-13 (Ie) | (250 V) NO 0.27 A |
| Rated Operational Current DC-13 (Ie) | (500 V) NC 0.15 A |
| Rated Operational Current DC-13 (Ie) | (500 V) NO 0.15 A |
| Rated Operational Current DC-13 (Ie) | (60 V) NC 0.55 A |
| Rated Operational Current DC-13 (Ie) | (60 V) NO 0.55 A |
| Degree of Protection | IP20 |
| Pollution degree | 3 |
| Connecting Capacity Auxiliary Circuit | Flexible with Ferrule 1/2x 0.75 ... 2.5 mm² |
| Connecting Capacity Auxiliary Circuit | Flexible with Insulated Ferrule 1x 0.75 ... 2.5 mm² |
| Connecting Capacity Auxiliary Circuit | Flexible with Insulated Ferrule 2x 0.75 ... 1.5 mm² |
| Connecting Capacity Auxiliary Circuit | Flexible 1/2x 0.75 ... 1 mm² |
| Connecting Capacity Auxiliary Circuit | Flexible 1/2x 1 ... 2.5 mm² |
| Connecting Capacity Auxiliary Circuit | Rigid 1/2x 0.75 ... 4 mm² |
| Connecting Capacity Main Circuit | Flexible with Ferrule 1/2x 0.75 ... 4 mm² |
| Connecting Capacity Main Circuit | Flexible with Insulated Ferrule 1/2x 0.75 ... 4 mm² |
| Connecting Capacity Main Circuit | Flexible 1/2x 0.75 ... 4 mm² |
| Connecting Capacity Main Circuit | Rigid 1/2x 0.75 ... 4 mm² |
| Tightening torque | Auxiliary Circuit 1 ... 1.2 N·m |
| Tightening torque | Main Circuit 2.5 ... 2.7 N·m |
| Wire Stripping Length | Auxiliary Circuit 9 mm |
| Wire Stripping Length | Main Circuit 12 mm |
| Recommended Screw Driver | Main Circuit Pozidriv 2 |
| Power Loss | at Rated Operating Conditions per Pole 1.1 ... 2.0 W |
| Suitable for | AF09ZB |
| Suitable for | AF09B |
| Suitable for | AF12ZB |
| Suitable for | AF12B |
| Suitable for | AF16ZB |
| Suitable for | AF16B |
| Suitable for | AF26ZB |
| Suitable for | AF26B |
| Suitable for | AF30ZB |
| Suitable for | AF30B |
| Suitable for | AF38ZB |
| Suitable for | AF38B |
| Standards | IEC/EN 60947-1 |
| Standards | IEC/EN 60947-4-1 |
| Standards | IEC/EN 60947-5-1 |
| Standards | UL 60947-1 |
| Standards | UL 60947-4-1 |
| Standards | IEC 60335-2-40 A2L |
Technical UL/CSA
| Maximum Operating Voltage UL/CSA | Main Circuit 600 V AC |
| Contact Rating UL/CSA | (NC:) B600 |
| Contact Rating UL/CSA | (NC:) Q600 |
| Contact Rating UL/CSA | (NO:) Q600 |
| Contact Rating UL/CSA | (NO:) D300 |
| Connecting Capacity Main Circuit UL/CSA | Flexible 1/2x 18-10 AWG |
| Connecting Capacity Main Circuit UL/CSA | Stranded 1/2x 18-10 AWG |
| Connecting Capacity Auxiliary Circuit UL/CSA | Flexible 1/2x 18-12 AWG |
| Connecting Capacity Auxiliary Circuit UL/CSA | Stranded 1/2x 18-12 AWG |
| Tightening Torque UL/CSA | Auxiliary Circuit 9 ... 11 in·lb |
| Tightening Torque UL/CSA | Main Circuit 13 ... 22 in·lb |
Why Proax for ABB TF42-5.7B?
Proax is an authorized distributor of ABB TF42-5.7B and one of ABB's largest distributors in North America. Our highly skilled in-house technical team is ready to assist with any technical needs.
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Additional Information
| Alternate Names | TF4257B |
| Pack Size | 1 |
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