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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Strategic Vision for a Sustainable Future
Looking ahead, ETEK Electric remains committed to becoming a globally renowned manufacturer in the new energy and electrical protection industry. We continue to focus on:
Developing innovative green energy solutions
Enhancing product safety and reliability
Expanding our sustainable technology portfolio
Supporting global energy transformation
Contributing to a low-carbon future

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