Description
ABB T75 DU 42 THERMAL OVERLOAD RELAY T75 DU (NEW OPEN BOX)
ABB
T75 DU 42
THERMAL OVERLOAD RELAY
T75 DU
29…..42A
TRIP CLASS 10A / UI=660/690V
EN 60947-4-1 / IEC947-4-1
EN 60947-5-1 / IEC947-5-1
NUMBER ON DIAL IS F.L.C.
TRIP CURR. IS 125% OF F.L.C.
COORDINATION TYPE ‘2’
MADE IN CZECH REPUBLIC
REF.NO: FKM1630
The ABB T75 DU 42 is a thermal overload relay designed to protect electric motors against sustained overcurrent and phase loss conditions. With an adjustable current range of 29 to 42A and a rated insulation voltage of 660/690V, this relay is well suited for demanding marine and industrial motor control circuits. Onboard vessels, thermal overload relays are critical components in motor control centres (MCCs), ensuring that pumps, fans, compressors, and winch drives are safeguarded from thermal damage caused by overloads or locked rotor conditions.
Key Features
✓ Adjustable full load current (F.L.C.) setting range: 29A to 42A with trip current at 125% of set F.L.C.
✓ Trip Class 10A for reliable and standardised motor protection response times
✓ Rated insulation voltage UI = 660/690V, suitable for marine switchboard voltage levels
✓ Coordination Type 2 ensuring no damage to overload relay or contactor under short-circuit conditions
✓ Compliant with EN 60947-4-1 / IEC 947-4-1 and EN 60947-5-1 / IEC 947-5-1 standards
Marine Applications
Motor protection in main engine room auxiliary systems such as cooling water pumps and lubricating oil pumps
Overload protection for HVAC fan motors and air handling unit drives throughout accommodation and machinery spaces
Safeguarding ballast pump motors, fire pump motors, and bilge pump motor circuits
Protection of deck machinery motor starters including winches, mooring equipment, and cargo handling systems
Integration into marine switchboards and motor control centres for compliance with classification society requirements
Why Marine Engineers Choose
ABB thermal overload relays are trusted across global fleets for their proven reliability, precise trip characteristics, and ease of integration into existing motor starter assemblies. The T75 DU 42 delivers Type 2 coordination, minimising downtime and component replacement costs following fault events — a critical advantage for vessels operating on tight maintenance schedules far from port.
Ideal For
Bulk carriers, container vessels, tankers, offshore support vessels (OSVs), cruise ships, ro-ro ferries, naval vessels, FPSOs, jack-up rigs, and any commercial or industrial marine installation requiring robust motor overload protection in the 29–42A range.
Technical Support & Compliance
We provide complete support solutions including remote troubleshooting, onboard technical assistance, testing and commissioning, repair services, retrofit and upgrade consultation, and full integration support for motor control circuits. To confirm compatibility with your specific installation, please share motor nameplate photos, existing relay part numbers, switchboard drawings, system model and version details, vessel name and IMO number, and project scope. All compatibility confirmations are subject to review of the provided documentation.
