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Suntree 20A Solar 2-Pole DC MCB – Reliable Protection for DC Solar Systems The Suntree 20A 2-Pole DC Miniature Circuit Breaker (MCB) is purpose-built for protecting direct current (DC) solar circuits from overcurrent and short-circuit faults. Ideal for use in...
The Suntree 20A 2-Pole DC Miniature Circuit Breaker (MCB) is purpose-built for protecting direct current (DC) solar circuits from overcurrent and short-circuit faults. Ideal for use in solar photovoltaic (PV) systems, this MCB disconnects both positive and negative conductors simultaneously to ensure safe isolation and system protection.
Its compact, DIN rail-mountable design makes it easy to integrate into DC combiner boxes or solar distribution panels. Engineered for high reliability and safety, it performs consistently even in harsh weather conditions and high-temperature environments.
| Specification | Details |
|---|---|
| Rated Current (In) | 20 Amps |
| Number of Poles | 2P (Positive and Negative) |
| Rated Operating Voltage (Ue) | 550V DC |
| Rated Insulation Voltage (Ui) | 1250V DC |
| Breaking Capacity (Icu) | 6kA |
| Tripping Curve | Type C |
| Operating Temperature Range | -30°C to +70°C |
| Ingress Protection | IP40 (IP20 at terminal points) |
| Terminal Torque | 2.0 – 3.5 Nm |
| Mounting | 35mm DIN rail |
| Standards Compliance | IEC 60947-2, CE, RoHS |
| Housing Material | Flame-retardant thermoplastic (UL94 V-0) |
| Mechanical Life | 8,500 cycles |
| Electrical Life | 1,500 cycles |
| Weight | Approx. 0.12 kg |
Dual-Pole Safety Disconnection
Interrupts both live DC lines at once, minimizing shock hazards and arc damage during faults.
High Fault Tolerance
Withstands up to 6kA of short-circuit current, safeguarding valuable solar components.
Reliable DC Performance
Specifically designed for PV systems, with stable tripping behavior in high-voltage DC circuits.
Durable and Flame-Resistant
Housing is made from high-grade thermoplastics resistant to heat, UV, and corrosion.
Quick Installation
Easily mounts onto standard DIN rails with front-facing terminals for fast, clean wiring.
Ensure the system is powered down before handling the MCB.
Mount the unit onto a standard 35mm DIN rail.
Connect the positive and negative conductors to the appropriate terminals.
Tighten the screws to the recommended torque (2.0–3.5 Nm).
Verify secure connections and restore system power to test functionality.
Rooftop and ground-mounted solar PV systems
Solar inverter DC input protection
Battery charge controller and energy storage circuits
Hybrid and off-grid solar installations
DC combiner boxes and distribution panels
