EKFS-50-2 Rapid Shutdown Device (2-String Firefighter Safety Switch)

Configuration: 2-String (Dual independent PV strings)

Max Voltage: 1500VDC

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

DC Connectors: MC4 (4 wiring points)

Protection Rating: IP65

Housing Material: PC+ABS

Operating Temperature: -20℃ to +70℃

Auto-Shutdown: Activates at 70℃

Standards Compliance: EN60947-3

Inquiry Now

Product Introduction

EKFS-50-2 is a professional Rapid Shutdown Device engineered for photovoltaic systems with dual-string configurations. Serving as a critical Firefighter Safety Switch, this 2-String model provides simultaneous DC isolation for two independent PV strings during emergencies. With a robust 1500VDC rating and 50A capacity per channel, it delivers reliable protection for commercial and industrial-scale installations.

Featuring automatic thermal shutdown at 70°C and IP65 environmental protection, the EKFS-50-2 supports easy integration via industry-standard MC4 connectors. Its dual-channel design optimizes safety for complex PV arrays while ensuring compliance with the latest rapid shutdown standards.

Applications

• Commercial solar installations with multiple strings

• Industrial-scale PV systems

• Large residential arrays with dual-string configurations

• Solar farms requiring redundant string isolation

• Government/municipal solar projects

Product Parameters

Model	EKFS-50-2
No. of strings	2
Max. string voltage	300-1500VDC
Max. string current	55A(800VDC), 50A(1000VDC), 40A(1200VDC), 30A(1500VDC)
Switch wiring	4
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

News&Blog

How to choose suitable electrical protection devices?

2025/07/15

Choosing suitable electrical protection devices involves analyzing the electrical system and its hazards, selecting matching devices meeting system requirements, and complying with standards like IEC and NEC.

What is Combiner Box?

2025/06/14

A combiner box, also known as a junction box, is a crucial electrical enclosure widely applied in photovoltaic (PV) systems, electrical power distribution networks, and diverse industrial applications.

What is a solar inverter?

2025/05/27

A solar inverter is a critical electronic device that converts DC electricity from solar panels into AC electricity for homes, businesses, and the grid.

What Is MCB?

2025/05/20

A Miniature Circuit Breaker (MCB)—named for its compact size and role in "breaking" (interrupting) electrical circuits— is a vital electro-mechanical safety device. It protects circuits from damage ca