Product Introduction

EKM6DC-630 DC Molded Case Circuit Breaker is a high-capacity protection device designed for DC electrical systems. With a rated current range of 400A to 630A and a voltage capacity of up to 1500V, it is ideal for large-scale solar PV and wind power installations. Its thermal-magnetic trip unit ensures precise protection against overloads and short circuits. Built to meet IEC60947-2 standards, the EKM6DC-630 delivers reliable performance in demanding environments.

Product Parameters

Model			EKM6DC-630	EKM6DC-630V
Ampere frame (Inm)			630A	630A
Rated current (In)			400,500,630A	2400,500,630A
Rated impulse withstand voltage (Uimp)			12kV
Rated operational voltage (Ue)		2P	250,500,750,1000,1250,1500 VDC
		3P	1000,1500 VDC
Rated ultimate short-circuit Breaking capacity (Icu)	2P	DC250V	25	70
		DC500V	25	70
		DC750V	15	50
		DC1000V	15	50
		DC1250V	/	20
		DC1500V	10	20
	3P	DC1000V	30	/
		DC1500V	25	/
Rated service short-circuit breaking capacity (Ics) kA			100% Icu
Isolation function			Available
Utilization category			Cat.A
Type of trip unit			Thermal-Magnetic
Mechanical life (Times)			20000
Electrical life (Times)			1500
Arcing distance (mm)			≤100

Recommended Products

EKM6DC-250EL DC MCCB with IP65 Waterproof Enclosure

Reliable outdoor DC circuit protection for solar photovoltaic systems and battery energy storage applications, with rated voltage up to 1000V DC and rated current up to 250A.

EKM6DC-800 High Capacity DC Circuit Breaker (630A-800A) - Enterprise Protection Solution

EKM6DC-800 represents the pinnacle of DC protection technology, designed for the most demanding applications. With superior breaking capacity and comprehensive protection features, it's the ultimate s

EKM6DC-400 1500V DC Molded Case Circuit Breaker (250A-400A) for Solar and Battery Systems

EKM6DC-400 DC Molded Case Circuit Breaker is designed for high-voltage DC systems, supporting rated currents from 250A to 400A and voltages up to 1500V. Its robust design ensures reliable protection a

EKM6DC-315 1500V DC Molded Case Circuit Breaker (280A-315A) for Renewable Energy Systems

KM6DC-315 DC Molded Case Circuit Breaker is engineered for high-performance protection in DC electrical systems. With a rated current range of 280A to 315A and a voltage capacity of up to 1500V, it is

News&Blog

When Your DC Molded Case Circuit Breaker Keeps Tripping

2026/06/03

A DC Molded Case Circuit Breaker repeatedly tripping signals overload, short circuit, or high ambient temperature. On EKM6DC‑800 models, check for terminal rise >75°C or carbonized arc chamber—both indicate replacement needed.

5 Tips for Selecting PV Circuit Breakers

2026/05/29

When designing a photovoltaic (PV) system, most of the attention goes to solar panels, inverters, and mounting structures. But what about the small component that stands between a smoothly running array and a dangerous electrical fire?

2026 Trends in Solar Circuit Breakers

2026/05/26

The solar energy landscape is evolving faster than ever. As photovoltaic installations scale from residential rooftops to utility‑grade power plants, the components that protect these systems must keep pace.

Retrofit Old Fuses with Solar Circuit Breakers

2026/05/22

Old fuse boxes – those porcelain bases with rewirable fuse wires – are still protecting many solar PV systems installed a decade ago. But are they really safe for today’s higher DC currents and continuous solar generation?

EKM6DC-630 1500V DC Molded Case Circuit Breaker (400A-630A) for Renewable Energy Systems