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AC Circuit Breakers SCB8-63

The Suntree SCB8-63 AC Circuit Breaker delivers dependable protection against overloads and short circuits, making it an excellent choice for on-grid solar PV systems, energy storage setups, and general AC distribution in both homes and commercial spaces. Available in 2-pole and 4-pole versions, it’s rated for AC 400V and covers a wide range of currents from 6A to 63A. You can select the trip curve that best fits your needs:

  • B curve (3–5×In) – ideal for standard resistive loads,
  • C curve (5–10×In) – great for mixed loads with moderate inrush currents,
  • D curve (10–20×In) – suited for highly inductive loads or motors.

With a strong 6kA breaking capacity, it handles fault currents effectively while keeping your system safe and stable. Its compact design saves valuable space in your distribution box, and it mounts quickly and securely on standard DIN rails for straightforward installation. Built to meet strict industry standards for solar and energy storage applications, the SCB8-63 combines high-quality construction with reliable, long-term performance you can count on. Perfect for installers and system owners looking for a trusted, no-fuss AC protection solution.

 Suntree AC MCB SCB8-63

Product Model

SCB8-63

Poles (P)

2P, 3P, 4P (focus on 2P/3P for 400V)

Rated Current (In, A)

6, 10, 16, 20, 25, 32, 40, 50, 63

Rated Voltage (Ue, V)

2P/3P/4P: AC 400; 1P: AC 230/240

Rated Insulation Voltage (Ui, V)

Typically 500 (standard for series)

Trip Characteristics

B (3-5In), C (5-10In), D (10-20In)

Breaking Capacity (Icn, A)

6000 (SCB8-63); up to 10000 (HS variant)

Instantaneous Protection Range

B: 3In-5In; C: 5In-10In; D: 10In-20In

Standards

IEC/EN 60898-1

Mounting

35mm DIN rail

Ingress Protection

IP20 (terminals), IP40 (device)

Operating Temperature

-25°C to +70°C

Mechanical Life (cycles)

20,000

Electrical Life (cycles)

10,000 (at 400V, depending on In)

Terminal Capacity (mm²)

1-25 (up to 35mm² for higher currents)

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