DISJONCTEUR DC SUNTREE 2P - 63A 550VDC

SUNTREE DC Circuit Breaker 2P – 63A – 550VDC

This breaker from the SL7N-63 series is a DC miniature circuit breaker (MCB) designed to protect direct current circuits. It is mainly used in photovoltaic systems, battery storage systems, and medium-to-high voltage DC industrial applications.

 Technical Specifications

Brand: SUNTREE

Series / Model: SL7N-63

Number of Poles: 2P (disconnects both positive and negative simultaneously)

Rated Current: 63A

Rated Voltage: 550V DC

Breaking Capacity: Up to 6 kA

Insulation Voltage (Ui): Approx. 1250V

Tripping Mechanism: Thermal-magnetic (overload and short circuit protection)

Non-polarized: No specific +/− connection direction required

Mounting: 35 mm DIN rail

Protection Degree: IP40 (body) / IP20 (terminals)

Operating Temperature: −30°C to +70°C

Standards: IEC 60947-2, CE, TUV (depending on version)

 Function & Application

This breaker is used to:

Protect circuits against overload above 63A

Rapidly interrupt short circuits even under high DC voltage

Fully isolate both positive and negative lines for maximum safety

It is essential in solar installations because breaking DC current is more complex than AC due to persistent electric arcs if a proper DC-rated breaker is not used.