ABB ef45-30 electronic overload relay 9a - 30a

Why Choose the ABB EF45-30 Electronic Overload Relay?

The ABB EF45-30 electronic overload relay is a highly accurate and dependable motor protection device designed to protect industrial motors against overload currents and phase failure conditions. Identified by part number 1SAX221001R1101, this relay forms part of the advanced ABB EF45 electronic overload relay series, engineered for demanding industrial automation and motor control applications.

The EF45-30 is a self-supplied electronic overload relay, meaning no additional external control power supply is required for operation. Compared with conventional thermal overload relays, it provides greater protection precision, a wide current adjustment range and selectable trip classes for enhanced flexibility across different motor starting applications.

With an adjustable current setting range of 9.0 to 30 A, integrated 1 NO + 1 NC auxiliary contacts, selectable trip classes 10E, 20E and 30E, and automatic or manual reset functionality, the EF45-30 delivers reliable motor protection while simplifying installation through direct mounting onto compatible ABB AF contactors.

Key Advantages

• Reliable electronic overload and phase failure protection.
• 9.0–30 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 EF45 electronic overload relay series.
• 9.0–30 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: EF45
• Model: EF45-30
• Part number: 1SAX221001R1101
• Product type: Electronic overload relay
• Current setting range: 9.0–30 A
• Rated operational current: 30 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
• Terminal type: Screw terminals
• Suitable for: ABB AF contactor range
• Frequency: 50 / 60 Hz
• Operating temperature: approx. -25 °C to +70 °C
• Standards: IEC/EN 60947-4-1
• Dimensions (W × H × D): approx. 45 × 104.7 × 86 mm
• Weight: approx. 0.36 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 EF45 series is widely used in industrial automation, motor starters and machinery systems where dependable protection, compact installation 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.