Why Choose the Rittal SV 9343.120 NH Fuse-Switch Disconnector?
The Rittal SV 9343.120 is a high-performance NH size 1 fuse-switch disconnector designed for Rittal 60 mm busbar systems. Rated for a maximum operating current of 250 A and an operating voltage range of 400–690 V AC, three-phase, it combines switching, isolation and NH fuse protection within a compact busbar-mounted assembly.
Featuring a three-pole configuration and robust box terminal connection, the SV 9343.120 accepts round conductors from 35–150 mm² and sector-shaped conductors from 50–150 mm². The cable outlet can be routed from the top or bottom, giving panel builders greater flexibility when arranging incoming and outgoing power conductors.
The SV 9343.120 also incorporates electronic fuse monitoring, providing additional functionality for monitored power distribution systems. Its polyamide construction, silver-plated electrolytic copper contact tracks and compatibility with 5 mm and 10 mm busbars make it a purpose-designed solution for industrial switchgear, distribution panels and machinery power systems.
Key Advantages
- Combines NH fuse protection, switching and isolation in one busbar-mounted device.
- 250 A maximum rated operating current for demanding distribution applications.
- 400–690 V AC three-phase operating voltage range.
- Designed for standard NH size 1 fuse inserts.
- Integrated electronic fuse monitoring supports monitored power distribution systems.
- Top or bottom cable outlet provides flexible conductor routing.
- Accepts round conductors from 35–150 mm².
- Accepts sector-shaped conductors from 50–150 mm².
- Compatible with 5 mm and 10 mm busbars on 60 mm busbar systems.
Key Features
- Rittal NH fuse-switch disconnector for 60 mm busbar systems.
- NH fuse size: 1.
- Rated operating current: Up to 250 A.
- Rated operating voltage: 400–690 V AC, 3-phase.
- 3-pole configuration.
- Electronic fuse monitoring: Yes.
- Electrical connection: Box terminal.
- Cable outlet: Top / bottom.
- 60 mm busbar centre-to-centre spacing.
- Suitable for busbars with 5 mm or 10 mm thickness.
- 35–150 mm² round conductor connection range.
- 50–150 mm² sector-shaped conductor connection range.
- Silver-plated electrolytic copper contact tracks.
- Tested in accordance with IEC/DIN EN 60947-3 and DIN EN 60269-2 for fuse inserts.
Reliable NH Fuse Protection and Isolation for Busbar Systems
NH fuse-switch disconnectors combine fuse protection with a switching and isolation function, providing a practical way to protect high-current feeders and distribution circuits. The Rittal SV 9343.120 mounts directly onto a 60 mm busbar system and accepts NH size 1 fuse inserts, helping create a compact and organised power distribution arrangement.
With a maximum operating current of 250 A, conductor capacity up to 150 mm² and flexible top or bottom cable routing, the SV 9343.120 is well suited to industrial panel building. Its integrated electronic fuse monitoring adds monitoring capability to the protective switching function, while the box terminals provide secure connections for high-current conductors.
Typical Applications
- Rittal 60 mm busbar power distribution systems.
- Industrial switchgear assemblies.
- NH fuse-protected feeder circuits.
- Main and sub-distribution panels.
- Machine and plant power distribution systems.
- Motor control and protection assemblies.
- Industrial automation cabinets.
- OEM switchboards and electrical panels.
