ABB | ELECTRONIC OVERLOAD RELAYS
Product overview
ABB EF electronic overload relays offer wide current-setting ranges for motor overload and phase-loss protection. Select the EF size or current range, trip class and reset mode; the page resolves the exact relay and the applicable mounting, remote-function and terminal accessories.
Key features
- EF19 through EF1250DU with listed setting ranges from 0.10 to 1250A.
- Selectable trip classes 10E, 20E and 30E with manual or automatic reset.
- Self-supplied electronic protection; no separate relay supply-voltage selection.
Technical selection summary
| Relay sizes | EF19, EF45, EF65, EF96, EF146, EF205, EF370, EF460, EF750 and EF1250DU |
|---|---|
| Current setting | 0.10–1250A across the listed relay ranges |
| Trip class | 10E / 20E / 30E; device settings, not separate relay SKUs |
| Auxiliary contacts | 1NC + 1NO |
| Reset | Manual / automatic |
| Standards | IEC/EN 60947-4-1 and IEC/EN 60947-5-1 |
Short-circuit protection must be provided separately. Remote-function options on this page exclude EF1250DU. Reset-coil and stop-coil AC/DC ratings differ; use the voltage shown for the selected accessory.
Relay size and current range
| EF19 | 0.1-0.32A, 0.3-1A, 0.8-2.7A, 1.9-6.3A, 5.7-18.9A |
|---|---|
| EF45 | 9-30A, 15-45A |
| EF65 | 20-56A, 25-70A |
| EF96 | 20-56A, 36-100A |
| EF146 | 54-150A |
| EF205 | 63-210A |
| EF370 | 115-380A |
| EF460 | 150-500A |
| EF750 | 250-800A |
| EF1250DU | 375-1250A |
Accessories and installation
Choose an accessory function to reveal its available contact arrangement, quantity or supply-voltage options. The selection summary lists the complete accessory type, ABB ordering reference and quantity per base device.
| Mounting Kit | Separate mounting |
|---|---|
| Remote Function | Reset, Stop |
| Terminal Shroud | Fitted |
| Contactor Busbar Kit | Fitted |
Typical applications
- Industrial motor protection
- Wide-range overload protection in AF starter panels
Technical documents
ABB Motor Protection and Control catalogue (complete PDF)
Related ABB products
ABB AF 3-pole contactors · ABB Electrical Materials
Catalogue data and dimensions
Series reference photographs are illustrative. Technical details, dimensions and notes below apply to the product types identified on each catalogue page.
