Why Choose the ABB OS20TPN-A 20 A 3P+N Steel Enclosed Switch Fuse?
The ABB OS20TPN-A is a 20 A, 3-pole plus neutral steel enclosed switch fuse designed for electrical switching, isolation and fuse-based circuit protection in industrial and commercial low-voltage installations. Part of ABB's metal enclosed load-break switching range, it combines a switch-fuse arrangement with a protective steel enclosure.
Featuring an IP65 enclosure protection rating, the OS20TPN-A is suitable for installations requiring protection against dust ingress and low-pressure water jets. Its 3P+N configuration provides a switching and neutral arrangement for compatible three-phase electrical distribution systems, with the exact neutral connection and switching function to be confirmed against ABB's installation documentation.
Identified by ABB order code OS20TPN-A, this enclosed switch fuse provides a practical solution for electrical contractors, control panel builders and maintenance engineers specifying a 20 A steel enclosed fused switching device for compatible electrical equipment and distribution circuits.
Key Advantages
- 20 A current rating for appropriately rated low-voltage electrical circuits.
- 3-pole plus neutral configuration for compatible three-phase installations.
- Integrated switch-fuse functionality combines manual switching with fuse-based protection.
- IP65-rated enclosure provides protection against dust and low-pressure water jets.
- Steel enclosure offers a robust housing for industrial electrical installations.
- Supports local electrical isolation for maintenance and servicing.
- Suitable for electrical distribution and equipment supply applications.
- Allows circuit protection to be coordinated through appropriately selected fuses.
- Enclosed construction helps protect internal electrical components.
- Suitable for industrial and commercial electrical environments.
- Part of ABB's established enclosed switching equipment range.
- Clearly identified by its OS20TPN-A manufacturer order code.
Key Features
- ABB OS20TPN-A steel enclosed switch fuse.
- 20 A rated current.
- 3P+N electrical configuration.
- IP65 enclosure protection rating.
- Steel enclosure construction.
- Combined switching and fuse-based protection arrangement.
- Manual load-break switching functionality.
- Designed for compatible three-phase electrical installations.
- Suitable for local electrical isolation applications.
- Enclosed construction for industrial and commercial environments.
- Compatible fuse selection must follow ABB's product specifications.
- ABB product group: Metal Enclosed (Loadbreak).
- ABB order code: OS20TPN-A.
Technical Specifications
- Manufacturer: ABB
- Model: OS20TPN-A
- ABB order code: OS20TPN-A
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: Steel enclosed switch fuse
- Rated current: 20 A
- Electrical configuration: 3P+N
- Number of phase poles: 3
- Neutral arrangement: Neutral connection included in product configuration
- Enclosure material: Steel
- Enclosure protection rating: IP65
- Switching function: Load-break switching and electrical isolation
- Protection arrangement: Fuse-based circuit protection
- Operating method: Manual switching
- Application: Industrial and commercial electrical distribution
- Product family: ABB metal enclosed switch-fuse equipment
Fused Electrical Isolation for Industrial and Commercial Distribution
The ABB OS20TPN-A provides a combined switching and fuse-based protection arrangement for compatible low-voltage electrical installations. Enclosed switch fuses are commonly used where electrical equipment requires a local switching point together with a correctly coordinated fuse protection system.
Its 20 A rating and 3P+N configuration make it relevant to suitable three-phase distribution circuits. The precise neutral arrangement, including whether the neutral conductor is switched or remains permanently connected, must be verified using ABB's product-specific technical documentation before installation.
The steel enclosure provides a robust protective housing, while the IP65 rating offers dust-tight protection and resistance to low-pressure water jets when the enclosure is correctly installed. Cable entries, glands and installation practices must preserve the specified enclosure protection.
Correct fuse selection is essential. The fuse type, size, rated current, breaking capacity and coordination with the connected equipment must be checked against ABB's technical specifications and the installation's prospective fault current. The switch fuse must also be selected according to its applicable operating voltage, utilisation category and switching duty.
Typical Applications
- Industrial electrical distribution circuits.
- Commercial electrical supply installations.
- Local fused isolation of electrical equipment.
- Three-phase machinery supply circuits.
- Industrial control and automation equipment supplies.
- Pump and ventilation system supply isolation.
- Building services electrical distribution.
- Manufacturing and processing facilities.
- Maintenance and servicing isolation points.
- Electrical installations requiring steel enclosed switching equipment.
- Distribution circuits requiring coordinated fuse protection.
- Installations requiring an IP65 enclosed switch fuse.
