TF42 - Thermal Overload Relays - ABB Low Voltage & Systems

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Company	ABB Low Voltage & Systems
Description	TF42 - Thermal Overload Relays
Bill of material	ABB - 1SAZ741201R1035 + TF42-4.2B Thermal Overload Relay for Railway Trip class 10, 3.10-4.20 A
Product ID	1SAZ741201R1035
Extended Product Type	TF42-4.2B
Invoice Description	TF42-4.2B Thermal Overload Relay for Railway Trip class 10, 3.10-4.20 A
Description	Thermal Overload Relay
Long Description	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
International product number	4013614517136
Product number of the Manufacturer	1SAZ741201R1035
Adjustable current range	3.1 - 4.2	A
Max. rated operation voltage Ue	690	V
Mounting method	Direct attachment
Type of electrical connection of main circuit	Screw connection
Number of auxiliary contacts as normally closed contact	1
Number of auxiliary contacts as normally open contact	1
Number of auxiliary contacts as change-over contact	1
Release class	CLASS 10
Reset function input	false
Reset function automatic	true
Reset function push-button	true
Customs tariff number	85364900
Deeplink product page	Link to product detail page
Type	TF42

Procurement

Last update	Jul 25, 2025, 10:06 AM
Part number	1SAZ741201R1035

All information without guarantee
Last update: Jul 25, 2025, 10:06 AM

Classifications

ETIM 10.0


Thermal overload relay:
Mounting method:	Direct attachment
Number of auxiliary contacts as normally open contact:	1
Number of auxiliary contacts as normally closed contact:	1
Number of auxiliary contacts as change-over contact:	1
Release class:	CLASS 10
Type of electrical connection of main circuit:	Screw connection
Max. rated operation voltage Ue:	690	V
Adjustable current range:	3.1 - 4.2	A
Reset function input:	false
Reset function automatic:	true
Reset function push-button:	true

CNS


Object Properties:
Order Number:	1SAZ741201R1035
Description long:	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
Description short:	TF42-4.2B Thermal Overload Relay for Railway
Manufacturer / brand name:	ABB
Product website:	https://new.abb.com/products/ABB1SAZ741201R1035
Customs Tariff Number:	85364900
GTIN-Code:	4013614517136

ETIM 8.0


Thermal overload relay:
Mounting method:	Direct attachment
Number of auxiliary contacts as normally open contact:	1
Number of auxiliary contacts as normally closed contact:	1
Number of auxiliary contacts as change-over contact:	1
Release class:	CLASS 10
Type of electrical connection of main circuit:	Screw connection
Max. rated operation voltage Ue:	690	V
Adjustable current range:	3.1 - 4.2	A
Reset function input:	false
Reset function automatic:	true
Reset function push-button:	true

ETIM 9.0


Thermal overload relay:
Mounting method:	Direct attachment
Number of auxiliary contacts as normally open contact:	1
Number of auxiliary contacts as normally closed contact:	1
Number of auxiliary contacts as change-over contact:	1
Release class:	CLASS 10
Type of electrical connection of main circuit:	Screw connection
Max. rated operation voltage Ue:	690	V
Adjustable current range:	3.1 - 4.2	A
Reset function input:	false
Reset function automatic:	true
Reset function push-button:	true

eclass


27-37-15-01 - Thermal overload relay:
Lowest value adjustable current range:	3.1 - 4.2	A
Release class:	CLASS 10
Greatest value adjustable current range:	3.1 - 4.2	A
max. rated operating voltage Ue:	690	V
Number of auxiliary contacts as changer:	1
Number of auxiliary contacts as opener:	1
Number of auxiliary contacts as shutter:	1
Connection type:	Screw connection
Assembly type:	Direct attachment

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ABB - 1SAZ741201R1035 + TF42-4.2B Thermal Overload Relay for Railway Trip class 10, 3.10-4.20 A