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ABB ef19-18.9 electronic overload relay 5.7a – 18.9a
ABB EF19-18.9 electronic overload relay with adjustable 5.7-18.9 A setting range, selectable trip classes and integrated phase failure protection for industrial motor control applications.
£84.08
Why Choose the ABB EF19-18.9 Electronic Overload Relay?
The ABB EF19-18.9 Electronic Overload Relay (Part Number: 1SAX121001R1105) is a high-performance electronic motor overload protection relay designed to provide accurate and dependable protection for three-phase motors against overload, phase failure and overheating. As part of the proven ABB EF19 electronic overload relay series, it combines advanced electronic sensing with simple installation, making it an ideal choice for industrial motor control applications.
Unlike conventional thermal overload relays, the EF19-18.9 delivers precise and repeatable motor protection over a wide ambient temperature range. The relay is self-powered, eliminating the need for an external control supply, while selectable trip classes provide flexibility for different motor starting characteristics. It mounts directly onto compatible ABB AF contactors for fast and efficient installation.
With an adjustable current setting range of 5.7-18.9 A, integrated auxiliary contacts and compact construction, the EF19-18.9 is ideally suited to motor starters used in pumps, compressors, conveyors, HVAC equipment, manufacturing machinery and industrial automation systems.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 5.7-18.9 A for flexible motor protection.
- Selectable Trip Class 10E, 20E and 30E.
- Protects against motor overload and phase failure.
- Self-powered design requiring no external control supply.
- Direct mounting onto compatible ABB AF contactors for rapid installation.
Key Features
- ABB EF19 electronic overload relay series.
- Current adjustment: 5.7-18.9 A.
- Rated operational current: 18.9 A.
- Selectable Trip Classes 10E / 20E / 30E.
- 1 NO + 1 NC auxiliary contacts.
- Automatic or manual reset selection.
- Integrated STOP, TEST and trip indication.
- Direct mounting with compatible ABB AF contactors.
Reliable Motor Protection for Industrial Applications
Electronic overload relays continuously monitor motor current and rapidly detect overload or phase loss conditions before damage occurs. This improves equipment reliability, reduces unplanned downtime and extends the service life of motors used throughout industrial automation systems.
The ABB EF19 series combines high measurement accuracy, temperature compensation and selectable trip classes to provide dependable motor protection across a wide range of industrial applications, making it a preferred solution for OEM machine builders, panel manufacturers and maintenance engineers.
Typical Applications
- Industrial motor starters and control panels.
- Pumps and compressor systems.
- Conveyors and material handling equipment.
- HVAC and ventilation systems.
- Packaging and production machinery.
- Industrial automation and process control equipment.
Technical Specifications
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| Compatible With | AF09–AF38 | |
|---|---|---|
| Mounting Type | Direct mount on contactor | |
| Device Type | Electronic Overload Relay | |
| Current Range | 5.7–18.9 A | |
| Trip Class | Adjustable (5–30) | |
| Reset Type | Manual / Automatic | |
| Current | 18.9 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Series | EF19 | |
| 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 |
Frequently Asked Questions
What is the ABB EF19-18.9 used for?
The EF19-18.9 protects three-phase electric motors against overload, phase failure and overheating in industrial motor control applications.
What current range does this overload relay support?
The relay provides an adjustable protection range from 5.7 A to 18.9 A.
Does the EF19-18.9 require an external power supply?
No. The relay is self-powered and does not require an additional external control supply.
Which trip classes are available?
The relay offers selectable Trip Class 10E, 20E and 30E to suit a wide variety of motor starting applications.
Which contactors is this relay compatible with?
The EF19-18.9 is designed for direct mounting onto compatible ABB AF09, AF12, AF16 and AF26 contactors.
Trusted by Industrial Control Professionals
ABB EF19 electronic overload relays are trusted worldwide by panel builders, OEM machine manufacturers and industrial maintenance engineers for delivering accurate motor protection, reliable operation and long service life.
