Description
The ABB EF19-6.3 is a thermal overload relay engineered to provide dependable protection for electric motors in commercial and industrial HVAC applications. Designed as part of ABB’s EF19 overload relay series, this unit is built to mount directly onto compatible ABB contactors, delivering a compact and integrated motor protection solution.
Key Features
- Rated current setting of 6.3A for precise motor overload protection
- Thermal overload detection guards against sustained overcurrent conditions that can damage motor windings
- Phase-failure sensitivity helps prevent single-phasing damage to three-phase motors
- Direct contactor mounting for a streamlined, space-saving installation
- Manual and automatic reset options for flexible system recovery after a trip event
- Trip indication for fast fault identification and reduced downtime
- Rugged construction suited for demanding commercial and industrial environments
Application
The EF19-6.3 is ideal for protecting compressor motors, fan motors, pump motors, and other HVAC drive loads where reliable overload protection is critical. Its compatibility with ABB’s contactor lineup makes it a natural choice for panel builders and service technicians working within the ABB ecosystem.
Why Choose ABB Overload Relays
ABB is a globally recognized leader in electrical protection and automation components. The EF-series overload relays are designed to meet the rigorous demands of motor control centers, rooftop units, air handling units, and commercial refrigeration systems — delivering long service life and consistent trip accuracy.







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