Why Choose the ABB OS20FP-A 20 A 4-Pole IP65 Steel Enclosed Switch Fuse?
The ABB OS20FP-A is a 20 A, four-pole steel enclosed switch fuse designed to provide dependable electrical isolation and fused switching for industrial and commercial electrical installations. Part of ABB's OS enclosed switch fuse range, it combines a manually operated switch-disconnector, BS88 fuse protection and a durable IP65-rated mild steel enclosure in one integrated assembly.
Featuring a four-pole switching configuration, the OS20FP-A is suitable for appropriately designed three-phase and neutral switching applications. Its 20 A thermal rating and compatibility with BS88 A1 fuse links make it a practical choice for electrical distribution circuits, machinery supplies and local equipment isolation.
The switch fuse is housed in a RAL 7035 light grey, powder-coated steel enclosure measuring 300 × 300 × 150 mm. It features a padlockable pistol-grip operating handle, hinged lockable door and removable top and bottom gland plates for convenient cable installation. ABB supplies this enclosed switch fuse assembly with fuse links, making it a practical solution for fixed indoor electrical installations.
Key Advantages
- 20 A rated current for suitable industrial and commercial electrical circuits.
- Four-pole switching supports simultaneous disconnection of four conductors.
- Integrated fused switching combines electrical isolation with fuse-based circuit protection.
- BS88 A1 fuse compatibility provides a recognised industrial fuse format.
- IP65-rated steel enclosure protects against dust and water jets when correctly installed.
- Powder-coated RAL 7035 finish provides a durable, professional enclosure surface.
- Padlockable pistol-grip handle supports controlled maintenance isolation.
- Hinged lockable enclosure door helps restrict access to internal electrical components.
- Removable top and bottom gland plates simplify cable entry and installation.
- Fuse links supplied as part of the enclosed switch fuse assembly.
- Compact 300 × 300 × 150 mm enclosure supports convenient wall mounting.
- Suitable for three-phase electrical distribution systems requiring four-pole switching.
- Provides a clearly identifiable local switching and isolation point.
- Part of ABB's established OS enclosed switch fuse range.
Key Features
- ABB OS20FP-A enclosed switch fuse.
- 20 A thermal current rating.
- Four-pole switching arrangement.
- BS88 A1 fuse link compatibility.
- 7.5 kW AC-23 switching power at 400 V AC.
- 11 kW AC-23 switching power at 500 V AC.
- 15 kW AC-23 switching power at 690 V AC.
- IP65 enclosure protection.
- Mild steel enclosure construction.
- RAL 7035 light grey powder-coated finish.
- Padlockable pistol-grip operating handle.
- Hinged enclosure door with lock.
- Removable cable gland plates at the top and bottom.
- Fuse links included with the enclosed switch fuse assembly.
- IP20 protection at incoming terminals within the enclosure.
- Enclosure dimensions: 300 × 300 × 150 mm.
- Designed for fixed indoor installation.
- Manual ON/OFF switching and isolation.
Technical Specifications
- Manufacturer: ABB
- Series: OS Enclosed Switch Fuses
- Model: OS20FP-A
- ABB order code: OS20FP-A
- Product type: Steel enclosed switch fuse
- Rated thermal current: 20 A
- Number of poles: 4
- Fuse standard: BS88
- Compatible fuse size: A1
- Fuse links: Supplied with assembly
- AC-23 operational power at 400 V AC: 7.5 kW
- AC-23 operational power at 500 V AC: 11 kW
- AC-23 operational power at 690 V AC: 15 kW
- Enclosure material: Mild steel
- Enclosure finish: Textured powder coating
- Enclosure colour: RAL 7035 light grey
- Enclosure protection rating: IP65
- Incoming terminal protection: IP20 within enclosure
- Operating handle: Pistol-grip handle
- Handle locking: Padlockable
- Door construction: Hinged
- Door locking: Lockable
- Cable entry arrangement: Removable gland plates
- Gland plate positions: Top and bottom
- Enclosure height: 300 mm
- Enclosure width: 300 mm
- Enclosure depth: 150 mm
- Mounting type: Surface mounting
- Installation environment: Indoor
- Operation: Manual ON/OFF
- Product category: Metal Enclosed Switch Fuses (Loadbreak)
Reliable Four-Pole Fused Isolation in a Steel IP65 Enclosure
The ABB OS20FP-A combines a four-pole switch-disconnector with BS88 fuse links to provide a convenient local isolation and fused switching arrangement. The manually operated mechanism enables the connected conductors to be switched together, while appropriately selected fuse links provide overcurrent and short-circuit protection according to their individual characteristics and the circuit design.
The 20 A enclosed switch fuse is suitable for electrical installations requiring a robust switching point with a protective steel housing. Its IP65 enclosure helps prevent the ingress of dust and water jets when all covers, seals and cable entries are correctly installed. The powder-coated RAL 7035 finish provides additional surface protection for the steel enclosure.
The padlockable pistol-grip handle supports controlled isolation procedures, while the hinged lockable door allows authorised access for installation, inspection and fuse maintenance. Removable gland plates at the top and bottom simplify cable routing. ABB identifies this steel enclosed range as unsuitable for external installation, so the OS20FP-A should be installed indoors in an environment compatible with its enclosure and electrical ratings.
Typical Applications
- Industrial electrical distribution circuits.
- Four-pole fused switching and isolation.
- Three-phase electrical supplies requiring switched neutral arrangements.
- Local machinery supply isolation.
- Commercial building electrical installations.
- Industrial control and distribution equipment.
- Electrical supplies to pumps, fans and mechanical plant.
- Indoor manufacturing and production facilities.
- Maintenance isolation points requiring a padlockable handle.
- Electrical installations requiring BS88 fuse protection.
- OEM machinery and equipment supply circuits.
- Indoor installations requiring IP65 steel enclosed switchgear.
