ATDM5DC-315 High Interrupting 50kA 315A 1000V/1500V Thermal Magnetic DC Breaker

Engineered for demanding commercial power systems, the ATDM5DC-315 stands out with an exceptional 50kA ultimate short-circuit breaking capacity (Icu). Designed to safeguard 315A circuits, it provides superior thermal stability and rapid quenching of DC arcs, making it the preferred choice for commercial PV rooftop projects and industrial DC grids.

Features & Benefits

Rated Current (In): 280A, 300A, 315A

Insulation Voltage (Ui): 1500V

Impulse Voltage (Uimp): 12kV

Operational Voltage (Ue): DC250V, DC500V, DC750V, DC1000V, DC1500V

Breaking Capacity (Icu): DC250V/500V: 50kA; DC750V/1000V: 25kA; DC1500V: 7.5kA (2P);DC1000V/1250V/1500V:25kA(3P)

Service Capacity (Ics): 100%Icu

Standards: GB/T14048.1, GB/T14048.2

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Product Details

Model		ATDM5DC-315	ATDM5DC-315
Model		2P External Dimensions	3P External Dimensions
Rated current (A)	In	280A、300A、315A
Rated insulation voltage（V)	Ui	1500V
Rated impulse withstand voltage（kV)	Uimp	12kV
Rated operational voltage (V)	Ue	DC250V、DC500V、DC750V、DC1000V、DC1500V	DC1000V、DC1250V、DC1500V
Rated Ultimate Short-circuit Breaking Capacity (kA)	Icu	DC250V、DC500V:50 DC750V、DC1000V:25 DC1500V:7.5	DC1000V、DC1250V、DC1500V:25
Rated service short-circuit breaking capacity（kA）	Ics	100%Icu
Connection Method		Pic1	Pic2
Isolation Function		Available
Utilization Category	Cat.	A
Mechanical Life	Times	20000
Electrical Life	Times	1500
Arcing Distance	mm	≯50
Dimensions	mm	200x73x135	200x107x135
Reference Ambient Temperature	℃	40

ATDM5DC-315 50kA High Breaking DC Breaker

ATDM5DC-315 Mounting dimension of front connection(2P)

ATDM5DC-315 Mounting dimension of front connection(3P)

Tripping characteristic curve

Note: The characteristic curve is measured under cold conditions and three-phase load

Tripping characteristic curve-315

Professional DC Circuit Protection Solutions (ATDM5DC Series)

The ATDM5DC Series represents the pinnacle of high-voltage DC protection, specifically engineered for the rigorous demands of modern renewable energy infrastructure. Rated for operational voltages up to DC 1500V, these Moulded Case Circuit Breakers (MCCB) provide a versatile safety backbone for Utility-Scale Solar PV, Wind Power, and Battery Energy Storage Systems (BESS).

Key Technical Advantages

●High-Voltage Leadership: Fully optimized for DC 1500V electrical systems, ensuring compatibility with the latest global high-efficiency power architectures.
●Certified Safety & Isolation: Features a dedicated isolation function (Symbol:⊥⭕ ) that guarantees complete circuit disconnection for secure maintenance and operational peace of mind.
●Extreme Environmental Resilience: Engineered to perform reliably in harsh climates, with a temperature tolerance ranging from -45°C to +70°C and stable operation at altitudes up to 2000m.
●Industrial-Grade Durability: Rated for Pollution Level 3, the series utilizes advanced corrosion-resistant materials to prevent interference from conductive dust and gases in demanding industrial sites.
●Flexible Installation: Designed for versatile deployment, these breakers can be installed horizontally or vertically without compromising performance or protection integrity.

Global Application Scope

Whether protecting Solar Combiner Boxes and DC Busbars, securing Battery Racks in Energy Storage Systems, or managing Wind Turbine control circuits and EV Charging infrastructure, the ATDM5DC series delivers the high-breaking capacity and thermal stability required for critical DC applications worldwide.