EKFS-50-1 Professional 1-String Rapid Shutdown Device (Firefighter Safety Switch)

Configuration: 1-String (Single PV string)

Max Voltage: 1500VDC

Max Current: 55A (800VDC), 50A (1000VDC), 40A (1200VDC), 30A (1500VDC)

DC Connectors: MC4 (2 wiring points)

Protection Rating: IP65

Housing Material: PC+ABS

Operating Temperature: -20℃ to +70℃

Auto-Shutdown: Activates at 70℃

Standards Compliance: EN60947-3

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Product Introduction

EKFS-50-1 is a professional Rapid Shutdown Device for single-string PV systems, also known as a Firefighter Safety Switch. It provides essential emergency DC isolation during fire incidents, supporting up to 50A at 1500VDC in an IP65-rated enclosure for reliable outdoor use.

Designed for residential and small commercial installations, the EKFS-50-1 offers automatic thermal shutdown at 70℃ and easy plug-and-play setup with MC4 connectors. This compact device ensures code compliance and dependable performance.

Applications

• Residential rooftop solar PV systems (single string)

• Small commercial PV arrays

• Retrofit projects requiring single-string compliance

• Critical fire safety upgrades for single-string inverters

Product Parameters

Model	EKFS-50-1
No. of strings	1
Max. stringvoltage	300-1500VDC
Max. stringcurrent	55A(800VDC), 50A(1000VDC), 40A(1200VDC), 30A(1500VDC)
Switch wiring	2
DC connector	MC4
Power supply type	AC single phase
Operating voltage	100-270VAC
Nominal voltage	230VAC
Operating frequency	47-53 Hz
Nominal frequency	50 Hz
Nominal current	30mA
Start up (loading) current	100mA (AWG)
Switch on action current	300mA
AC connector	Plug-in
Protection degree	IP65
Protection level	Class II
Switch according to	EN60947-3
Mechanical endurance	9700
Electrical endurance	300
Operating temperature	-20°C ~ 70°C
Storage temperature	-40°C ~ 85°C
Max. temperature for automatic shutdown	70°C

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