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Suntree 63A Solar 2 Pole DC MCB – High-Performance Protection for Photovoltaic Systems The Suntree 63A 2-Pole DC Miniature Circuit Breaker (MCB) is a high-quality protective device designed specifically for direct current (DC) circuits, making it ideal for use in...
The Suntree 63A 2-Pole DC Miniature Circuit Breaker (MCB) is a high-quality protective device designed specifically for direct current (DC) circuits, making it ideal for use in solar photovoltaic (PV) installations. This MCB offers fast, reliable protection against overcurrent, short circuits, and wiring faults—essential for safeguarding inverters, solar panel strings, battery banks, and charge controllers.
Its dual-pole design simultaneously disconnects both the positive and negative lines in a DC circuit, enhancing safety, especially in solar systems where high-voltage DC currents are common. Built for long-term durability, this breaker ensures stability and safety even in harsh weather conditions or high-temperature environments.
| Specification | Details |
|---|---|
| Model | Suntree SL7N-63 |
| Type | DC MCB (Miniature Circuit Breaker) |
| Poles | 2 Pole (Positive and Negative) |
| Rated Current (In) | 63 Amps |
| Rated Voltage (Ue) | 550V DC |
| Rated Insulation Voltage | 1000V DC |
| Breaking Capacity (Icn) | 6kA |
| Operating Frequency | 50/60Hz |
| Tripping Curve | C Curve (Standard for solar applications) |
| Operating Temperature Range | -30°C to +70°C |
| Protection Class | IP40 (IP20 at terminals) |
| Installation | 35mm DIN Rail Mount |
| Standards Compliance | IEC 60947-2, CE, RoHS |
| Terminal Tightening Torque | 2.0 – 3.5 Nm |
| Housing Material | Flame-retardant thermoplastic (UL94 V-0) |
DC-Specific Protection
Designed to manage the unique arc characteristics of direct current, making it ideal for use in PV systems.
High Breaking Capacity
Withstands up to 6kA fault currents without risk of failure, ensuring continued circuit protection even in demanding environments.
Dual Pole Disconnection
Simultaneously interrupts both positive and negative poles in the circuit, enhancing safety for maintenance or emergency shutdowns.
Long-Term Durability
Constructed from flame-retardant, high-temperature-resistant materials, the unit is built for over 20,000 operation cycles.
Space-Saving Design
Compact form factor allows for efficient integration into solar combiner boxes and DC distribution panels.
Easy to Install and Replace
Designed for standard 35mm DIN rail systems with front-facing terminal screws for easy access and fast connection.
Power Down: Ensure the solar PV system is de-energized before installation.
DIN Rail Mounting: Snap the MCB securely onto a 35mm DIN rail inside the enclosure.
Wiring: Connect the positive and negative DC cables to the designated terminals using proper torque.
Tighten: Secure terminal screws to the recommended torque for optimal conductivity and safety.
Testing: Energize the system and perform functional tests to ensure proper tripping and reset functions.
Solar PV String and Array Protection
Inverter DC Input Circuit Protection
Battery Bank Overcurrent Protection
DC Combiner Boxes and Distribution Boards
Off-Grid and Hybrid Power Systems
EV Charging DC Circuits
