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1SCA022701R2070 ABB 50 A aM NH1 Motor Fuse 690 V
ABB OFAA1AM50 is a 50 A, 690 V AC, NH1 size 1 DIN-type aM HRC fuse link designed for coordinated short-circuit protection of industrial motor circuits.
£18.75
Why Choose the ABB OFAA1AM50 50 A aM Motor Fuse?
The ABB OFAA1AM50, ABB order code 1SCA022701R2070, is a DIN-type HRC fuse link designed for motor-circuit protection. Rated at 50 A and 690 V AC, this fuse combines the aM utilisation category with the NH1 / DIN size 1 format for use with compatible industrial fuse bases and fuse-switch equipment.
As an aM motor fuse, the OFAA1AM50 provides partial-range protection primarily against short-circuit currents. Its operating characteristic is designed to accommodate the temporary high inrush currents associated with motor starting, while sustained overload protection is normally provided separately by a suitably coordinated overload relay or electronic motor-protection device.
The OFAA1AM50 has a rated power loss of 2.9 W and a net weight of approximately 0.28 kg. Its combination of a 50 A current rating, 690 V AC capability and standard NH1 construction makes it suitable for industrial motor starters, motor-control centres and machinery requiring coordinated short-circuit protection.
Key Advantages
- 50 A rated current for appropriately coordinated motor circuits.
- 690 V AC rated voltage for demanding industrial systems.
- aM utilisation category designed for motor-circuit short-circuit protection.
- Standard NH1 / DIN size 1 construction.
- Designed to accommodate normal motor starting currents.
- DIN-type HRC fuse-link construction.
- Low rated power loss of 2.9 W.
- Part of ABB's established OFAA industrial motor fuse range.
Key Features
- ABB OFAA1AM50 fuse link.
- 50 A rated current.
- 690 V AC rated voltage.
- aM motor-protection characteristic.
- NH1 / DIN size 1.
- DIN-type high-rupturing-capacity fuse construction.
- Designed for coordinated motor protection.
- 2.9 W rated power loss.
- Approximate net weight of 0.28 kg.
- Delivery batch of 3 pieces.
Coordinated Short-Circuit Protection for Motor Circuits
Electric motors can draw substantially more than their normal running current during starting, requiring protection that can tolerate temporary inrush without unnecessary fuse operation. The aM characteristic of the ABB OFAA1AM50 is designed for this duty, allowing normal motor-starting conditions while providing protection against damaging short-circuit currents.
Because an aM fuse provides partial-range protection, the OFAA1AM50 is normally coordinated with a suitable overload relay or another motor overload-protection device. When correctly selected as part of a coordinated motor starter, its 50 A rating and NH1 construction provide dependable short-circuit protection for industrial motors and machinery.
Typical Applications
- Industrial motor circuits.
- Motor control centres.
- Direct-on-line and coordinated motor starters.
- Pumps, fans and compressors.
- Conveyors and material-handling systems.
- Industrial machinery and production equipment.
- 690 V AC systems requiring NH1 aM motor fuse protection.
Technical Specifications
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| Voltage | 690 V | |
|---|---|---|
| Fuse Type | NH (DIN) | |
| Fuse Size | NH1 | |
| Fuse Class | aM | |
| Current | 50 A | |
| Device Type | Fuse link | |
| Series | OFAA | |
| ABB order code | 1SCA022701R2070 | |
| Product type | DIN-type HRC motor fuse link | |
| Fuse utilisation category | aM | |
| Rated current | 50 A | |
| Rated voltage | 690 V AC | |
| NH size | 1 | |
| DIN fuse size | 1 | |
| Application | Motor-circuit short-circuit protection | |
| Power loss | 2.9 W | |
| Net weight | approx. 0.28 kg | |
| Delivery batch | 3 pieces |
Frequently Asked Questions
What is the ABB OFAA1AM50?
The ABB OFAA1AM50 is a 50 A, 690 V AC, NH1 / DIN size 1 HRC fuse link with an aM characteristic designed primarily for motor-circuit short-circuit protection.
What does aM mean on the OFAA1AM50?
The aM utilisation category identifies a partial-range fuse intended for motor circuits, providing short-circuit protection while accommodating the temporary high currents associated with normal motor starting.
What size is the ABB OFAA1AM50?
The OFAA1AM50 is an NH1 / DIN size 1 fuse link.
What are the ratings of ABB order code 1SCA022701R2070?
ABB order code 1SCA022701R2070 is the OFAA1AM50 motor fuse rated at 50 A and 690 V AC, with a rated power loss of 2.9 W.
Does the OFAA1AM50 provide motor overload protection?
The OFAA1AM50 is an aM partial-range motor fuse intended primarily for short-circuit protection, so a suitably coordinated overload relay or other motor overload-protection device is normally required.
Trusted ABB Motor Fuse Protection
ABB OFAA aM fuse links provide DIN-format short-circuit protection for motor circuits, supporting coordinated protection of industrial drives, motor starters and machinery.
