Main Switch Circuit Breaker

The DZ47-125 series is a compact high breaking miniature circuit breaker designed for main switching, branch protection, and electrical distribution control in low-voltage AC systems. It is suitable for 50Hz circuits with rated voltage up to 230V AC for single-pole applications and up to 400V AC for multi-pole configurations. With rated current options from 63A to 125A, the product provides dependable overload and short-circuit protection for residential distribution boards, commercial electrical panels, equipment cabinets, and light industrial control boxes. As a Main Switch Circuit Breaker, it helps isolate the incoming supply, protect downstream wiring, and improve daily operation safety for installers and end users.

• High Breaking Performance: The rated breaking capacity reaches 35kA, helping the breaker handle fault currents more safely in demanding distribution environments.
• Clear ON/OFF Indication: The front status window uses a red indicator for ON and a green indicator for OFF, making circuit status easy to identify during maintenance.
• Multiple Pole Options: Available in 1P, 2P, 3P, and 4P versions, the series can be selected according to different wiring structures and panel requirements.
• Standard DIN Rail Installation: The breaker is designed for TH35-7.5 DIN rail mounting, supporting fast installation, replacement, and panel assembly.

This product is suitable for use as an incoming main switch, distribution protection device, or circuit isolation component in AC electrical systems. Typical applications include household distribution boxes, commercial building panels, workshop power cabinets, lighting distribution boards, small machinery control systems, and OEM electrical equipment. The 125A maximum rating makes it practical for projects that require higher current capacity than standard small modular breakers while still needing compact panel installation.

The breaker should be installed by qualified electrical personnel and mounted vertically on a compatible DIN rail. The installation area should be dry, clean, and free from conductive dust, corrosive gases, rain, snow, or strong vibration. The manual indicates that copper conductors should be stripped to about 15mm before connection. Recommended conductor cross-sections are 16mm² for 63A, 25mm² for 80A, 35mm² for 100A, and 50mm² for 125A. Terminals should be tightened securely according to project requirements to reduce overheating risk and ensure stable contact performance.

When selecting this breaker, confirm the rated current, pole number, incoming voltage, cable size, and cabinet space before ordering. For single-phase circuits, 1P or 2P options may be used depending on the protection design. For three-phase systems, 3P and 4P models support different neutral-line requirements. If the breaker is used as the main incoming protection device, the selected current rating should match the upstream supply capacity and downstream load demand.

Need a reliable circuit breaker for distribution panels, equipment cabinets, or OEM electrical projects? Send us your required rated current, pole configuration, quantity, and application details. Our team can help confirm the suitable DZ47-125 model and provide product information, technical support, and a competitive quotation for bulk supply.