ABB ef19-18.9 electronic overload relay 5.7a - 18.9a

Why Choose the ABB EF19-18.9 Electronic Overload Relay?

The ABB EF19-18.9 electronic overload relay is a compact and highly accurate motor protection device designed to safeguard industrial motors against overload currents and phase failure conditions. Identified by part number 1SAX121001R1105, this relay is part of the advanced ABB EF electronic overload relay series, engineered for dependable motor protection in demanding industrial automation and control systems.

The EF19-18.9 is a self-supplied electronic overload relay, meaning no additional external control power supply is required. Compared with conventional thermal overload relays, it provides improved protection precision, a wider adjustment range and selectable trip classes for greater flexibility across different motor starting applications.

With an adjustable current setting range of 5.7 to 18.9 A, integrated 1 NO + 1 NC auxiliary contacts, selectable trip classes 10E, 20E and 30E, and both automatic and manual reset functionality, the EF19-18.9 delivers reliable motor protection while simplifying installation through direct mounting onto compatible ABB AF contactors.

Key Advantages

• Reliable electronic overload and phase failure protection.
• 5.7–18.9 A adjustable current range.
• Self-powered operation with no external supply required.
• Selectable trip classes 10E, 20E and 30E.
• Integrated 1 NO + 1 NC auxiliary contacts.
• Automatic or manual reset selectable.
• Temperature compensated protection with trip indication.

Key Features

• ABB EF electronic overload relay series.
• 5.7–18.9 A setting range.
• 3-pole motor protection relay.
• Integrated phase failure sensitivity.
• Trip classes 10E, 20E and 30E selectable.
• Integrated 1 NC trip contact.
• Integrated 1 NO signal contact.
• STOP and TEST buttons integrated.
• Direct mounting onto ABB AF contactors.
• Wide operational temperature range and compact housing.

Technical Specifications

• Manufacturer: ABB
• Series: EF19
• Model: EF19-18.9
• Part number: 1SAX121001R1105
• Product type: Electronic overload relay
• Current setting range: 5.7–18.9 A
• Rated operational current: 18.9 A
• Trip classes: 10E / 20E / 30E selectable
• Rated operational voltage: Main circuit 690 V AC
• Auxiliary circuit voltage: 600 V AC/DC
• Number of poles: 3
• Auxiliary contacts: 1 NC + 1 NO
• Degree of protection: IP20
• Mounting type: Direct mounting to contactor
• Suitable for: ABB AF09, AF12, AF16, AF26 contactors
• Frequency: 50 / 60 Hz
• Operating temperature: approx. -25 °C to +70 °C
• Standards: IEC/EN 60947-4-1
• Dimensions (W × H × D): approx. 44.4 × 85 × 59.3 mm
• Weight: approx. 0.158 kg

Advanced Electronic Motor Protection

Electronic overload relays provide accurate motor protection by continuously monitoring motor current and reacting quickly to overload or phase loss conditions. Compared with conventional thermal overload relays, electronic overload relays deliver improved accuracy, wider setting flexibility and selectable trip characteristics for different motor starting requirements.

The ABB EF19 series is widely used in industrial automation, motor starters and machinery systems where compact size, dependable protection and flexible trip settings are essential for efficient motor control operation.

Typical Applications

• Industrial motor starters and control panels.
• Conveyors and material handling systems.
• Pumps, compressors and ventilation systems.
• OEM machinery and automation equipment.
• Industrial process control systems.
• HVAC and building automation applications.

Trusted by Industrial Automation Engineers

ABB EF electronic overload relays are trusted worldwide for accurate motor protection, flexible trip settings and dependable performance in industrial automation and machinery applications.