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1SAX121001R1105 — Electronic overload relay
relayPart number: 1SAX121001R1105
ABB 1SAX121001R1105 (EF19-18.9) is a self-supplied, three-pole electronic overload relay with an adjustable 5.7–18.9 A setting range. It provides motor overload and phase-loss protection, selectable trip classes and manual or automatic reset. It includes normally closed trip and normally open signal contacts, plus STOP and TEST functions.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAX121001R1105 |
| Category | Electrical & controls |
| Ex Operating Instructions | ATEX - Operating instructions for EF electronic overload relay for potentially explosive areas |
| Time-Current Characteristic Curve | Tripping characteristic - Electronic overload relay EF19, EF45, EF65, EF96, EF146, EF205, EF370, EF460, EF750 from cold state |
| Product Net Width | 44.4 mm |
| Product Net Height | 85 mm |
| Product Net Depth / Length | 59.3 mm |
| Product Net Weight | 0.158 kg |
| Setting Range | 5.7–18.9 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 18.9 A |
| Rated Frequency (f) | Auxiliary Circuit 50 Hz |
| Rated Impulse Withstand Voltage (U imp ) | Auxiliary Circuit 6 kV |
| Rated Insulation Voltage (U i ) | 690 V |
| Number of Poles | 3 |
| Number of Auxiliary Contacts NC | 1 |
| Number of Auxiliary Contacts NO | 1 |
| Number of Protected Poles | 3 |
| Conventional Free-air Thermal Current (I th ) | Auxiliary Circuit NC 6 A |
| Rated Operational Current AC-15 (I e ) | (240 V) NC 3 A |
| Rated Operational Current DC-13 (I e ) | (125 V) NC 0.55 A |
| Degree of Protection | IP20 |
| Connecting Capacity Auxiliary Circuit | Flexible with Ferrule 1/2x 0.75 ... 2.5 mm² |
| Connecting Capacity Main Circuit | Flexible with Ferrule 1/2x 0.75 ... 2.5 mm² |
| Tightening Torque | Auxiliary Circuit 0.8 ... 1.2 N·m |
| Wire Stripping Length | Auxiliary Circuit 9 mm |
| Mounting Position | 1 ... 6 |
| Power Loss | at Rated Operating Conditions per Pole 0.028 ... 0.304 W |
| Maximum Operating Voltage UL/CSA | Main Circuit 600 V AC |
| Contact Rating UL/CSA | (NC:) B600 |
| Published component type | Electronic overload relay |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Trip Class | 10E, 20E or 30E, selectable |
| Reset Mode | Manual or automatic, selectable |
| Main Circuit Rated Operational Voltage | 690 V AC |
| Operating Ambient Temperature | −25 to +70 °C |
| Terminal Type | Screw terminals |
| Power Supply | Self-supplied; no external supply required |
Catalogue information may contain errors or be out of date. Full specifications and verified details are available on request. Confirm the part number and equipment fitment with us before ordering.
Product questions
What current range does the ABB EF19-18.9 cover?
The adjustable overload setting range is 5.7–18.9 A. Check the motor’s rated current and protection requirements before selecting the relay.
What do terminals 95–96 and 97–98 do on the EF19-18.9?
Terminals 95–96 are the normally closed trip contact; 97–98 are the normally open signal contact. On an overload trip, 95–96 opens and 97–98 closes.
Which trip classes and reset options does the EF19-18.9 offer?
Trip classes 10E, 20E and 30E are selectable. The relay also offers selectable manual or automatic reset, plus STOP and TEST functions.
Does the EF19-18.9 provide short-circuit protection?
No. ABB states that the overload relay must be protected against short circuits by a separate protective device. Selection depends on the complete circuit and applicable requirements.
Does the EF19-18.9 require an external power supply?
No extra external supply is required: the electronic overload relay is self-supplied from the motor current.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.