Description
xGAVE SFF140/4 Firefighter Safety Switch 4 Strings - Made in Spain
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.
Main Benefits
- Designed for firefighter and emergency PV shutdown applications
- Supports 4 solar PV strings
- Wide operating range from 300V to 1500V DC
- Plug and play installation for faster setup
- Remote manual disconnection from a safe location
- Automatic shutdown when temperature exceeds 70°C
- Integrated control circuit for device status verification
- Status signalling for clearer system monitoring
- MC4 safe quick connection for reliable installation
- IP66 enclosure for outdoor durability
Why Use a Firefighter Safety Switch
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.
Remote Emergency Disconnection
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.
Integrated Temperature Monitoring
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.
Technical Specifications
| 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 |
Applications
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.
Specifications
x| MODEL | BFS-S4 |
| Max DC voltage IEC/EN 60947-3 | 1500V |
| Max DC current IEC/EN 60947-3 | 50A |
| Number of Strings | 4 strings |
| Operating Voltage | 90Vac-260Vac |
| Nominal Voltage | 230Vac |
| Nominal Current | 30mA |
| Start up Current | Average 100mA |
| Switch on Action Current | Max 300mA |
| Protection Degree | IP66 |
| Storage temperature allowed between | -40ºC-85ºC |
| Maximum operating temperature before automatic switch OFF | +85ºC |
| Protection Level | Class II |
| Number of operations without current | 9700 |
| Number of operations under load with current | 300 |
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.