Rittal SV9677.340 is a 1250 A, 690 V AC, 3-pole NH size 3 twin-track slimline fuse-switch disconnector for 185 mm industrial busbar systems and current transformer installation.
£719.78
The Rittal SV9677.340 is a high-capacity NH slimline fuse-switch disconnector designed for switching, isolation and fused protection in demanding industrial low-voltage power distribution systems. Rated for a maximum operating current of 1250 A at 690 V AC, this 3-pole unit provides a robust solution for high-current three-phase switchgear and busbar installations.
Designed for NH size 3 fuse inserts, the SV9677.340 is a twin-track design for busbar systems with 185 mm centre-to-centre spacing. It uses substantial M12 bolt connections and accommodates round conductors from 6–240 mm², providing dependable electrical connections for high-current distribution applications.
The unit is manufactured from polyamide with fire protection corresponding to UL 94-V0, while partially silver-plated hard copper contact tracks provide reliable electrical performance. The SV9677.340 is also suitable for current transformer installation, making it well suited to distribution systems requiring current measurement and monitoring.
NH fuse-switch disconnectors combine switching, electrical isolation and fuse protection within a single power distribution component. This allows high-current outgoing circuits to be safely disconnected while compatible NH fuse inserts provide protection against excessive current, making these devices particularly suitable for industrial switchboards and major distribution assemblies.
The Rittal SV9677.340 is engineered specifically for high-current applications within 185 mm busbar systems. Its twin-track construction, 1250 A maximum operating current and M12 electrical connections provide the capacity required for demanding distribution circuits, while current transformer compatibility enables electrical measurement and monitoring to be incorporated into the installation.
| Manufacturer | Rittal |
|---|---|
| Series | SV |
| Model | SV9677.340 |
| Product type | NH slimline fuse-switch disconnector |
| NH fuse size | 3 |
| Rated operating current | 1250 A max. |
| Rated operating voltage | 690 V AC, 3-phase |
| Number of poles | 3-pole |
| Design | 3-pole, switchable, twin track |
| Busbar centre-to-centre spacing | 185 mm |
| Electrical connection | M12 bolt |
| Cable outlet | Bottom |
| Round conductor connection | 6–240 mm² |
| Suitable busbar height | 10 mm |
| Current transformer installation | Yes |
| Double disconnector | Yes |
| Material | Polyamide |
| Fire protection | UL 94-V0 |
| Contact tracks | Partially silver-plated hard copper |
| Chassis colour | RAL 7035 |
| Cover colour | RAL 7001 |
| Handle colour | RAL 7016 |
| Width | 200 mm |
| Height | 670 mm |
| Net weight | 14 kg |
| Gross weight | 14.4 kg |
| Copper content | 6.838 kg per piece |
| Test specification | IEC/DIN EN 60947-3 |
| Fuse insert standard | DIN EN 60269-2 |
| Pack quantity | 1 piece |
| EAN | 4028177705579 |
| ETIM 9 | EC001046 |
| ECLASS 8.0 | 27371402 |
The SV9677.340 is an NH slimline fuse-switch disconnector designed for fused switching and isolation of high-current three-phase circuits in industrial busbar, switchgear and low-voltage power distribution systems.
The SV9677.340 is designed for NH size 3 fuse inserts in accordance with DIN EN 60269-2.
The switch disconnector has a maximum rated operating current of 1250 A and a rated operating voltage of 690 V AC for three-phase systems.
The unit is designed for busbar systems with 185 mm centre-to-centre spacing and is suitable for busbars with a height of 10 mm.
Yes. The SV9677.340 is suitable for current transformer installation, allowing current measurement and monitoring to be integrated into the power distribution system.
Rittal SV power distribution components are engineered for professional high-current switchgear and control panel applications, providing dependable fused switching, electrical isolation and busbar integration for demanding industrial power distribution systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...