The GAVE SFF140/4 Firefighter Safety Switch is a specialist PV safety device designed to disconnect photovoltaic strings quickly in emergency situations. It helps improve firefighter safety by stopping DC current flow from the solar array, allowing emergency teams to work more safely during fire incidents or critical faults.
This model supports 4 PV strings and operates across a wide voltage range from 300V to 1500V DC. It is built in a durable PC+ABS enclosure with IP66 protection for demanding outdoor installations. In addition, the switch features safe MC4 quick connections, integrated temperature monitoring, automatic disconnection at 70°C, and remote manual shutdown capability.
During a fire, solar panels can continue generating dangerous DC voltage even when the building supply has been isolated. The GAVE SFF140/4 is designed to interrupt the current flowing from the PV panels to the inverter, helping to reduce electrical risk during emergency intervention. This makes it a valuable safety component for commercial and professional solar PV installations.
The SFF140/4 can be remotely operated using a manual switch or emergency stop button installed in a safe location. When the power supply to the SFF is interrupted through the emergency stop device, the PV strings are disconnected. This allows fast response in emergency conditions and supports safer access for firefighters and maintenance personnel.
The switch includes built-in sensors that continuously monitor temperature inside the device. If overheating is detected and the temperature rises above 70°C, the unit automatically disconnects the current from the solar panels to the inverter. This extra layer of protection helps improve installation safety in fault conditions.
| Model | SFF140/4 |
| Product Code | 029SFF140/4 |
| EAN | 8430892355513 |
| Number of Strings | 4 |
| String Voltage (Ue) | 300 to 1500V DC |
| AC Disconnection Circuit | 230V - 30mA |
| String Current at 600V | 50A |
| String Current at 1000V | 40A |
| String Current at 1500V | 20A |
| Automatic Shutdown Temperature | 70°C / 158°F |
| Connection Type | MC4 safe quick connection |
| Protection Rating | IP66 |
| Base Colour | RAL 9006 |
| Cover Colour | RAL 7038 |
| Weatherproof Ventilation Valve | 1 |
| Standard | IEC 60947-3 - DC-PV1 |
| Height | 370 mm |
| Width | 203 mm |
| Length | 88 mm |
| Enclosure Material | PC+ABS |
The GAVE SFF140/4 is ideal for photovoltaic systems where emergency shutdown, installer safety, and fire response protection are essential. It is suitable for commercial rooftops, industrial PV systems, and professional solar installations that require safe and reliable string isolation.