Model number of components in the distribution box

Distribution boxes contain components like MCBs, RCCBs, RCBOs, busbars, and isolators, each with manufacturer-specific model numbers based on ratings and type.

Key Components and Their Typical Specifications

Miniature Circuit Breakers (MCBs)Protect individual circuits from overload and short circuits. Model numbers vary by manufacturer and are usually based on current rating (A), number of poles, and breaking capacity. For example, a 16A single-pole MCB may have a model like C16-1P.

Residual Current Circuit Breakers (RCCBs)Detect leakage currents to prevent electric shocks. Model numbers often indicate rated current, sensitivity (mA), and poles, e.g., RCCB 63A 30mA 2P.

RCB

Os (Residual Current Breaker with Overcurrent Protection)Combine MCB and RCCB functions. Model numbers reflect current rating, sensitivity, and pole configuration, e.g., RCBO 25A 30mA 1P+N.

Busbars

Conduct electricity within the distribution box. Model numbers are usually manufacturer-specific and may include material type, current rating, and length, e.g., Copper Busbar 100A 3P. Isolators / Disconnect SwitchesManually disconnect circuits for maintenance.

Model numbers indicate voltage rating, current rating, and pole configuration, e.g., ISOL 63A 3P. Enclosure / Distribution Box HousingMade from thermoplastics (PC, ASA) or metal (powder-coated steel). Model numbers often reflect IP rating, number of ways, and mounting type, e.g., DB-12W-IP65 for a 12-way, IP65-rated box.

Optional Components

Surge Protection Devices (SPD): Model numbers indicate voltage protection level and type. Indication Lights / Smart Modules: Model numbers reflect functionality and communication protocol.

How to Identify Model Numbers

Check the manufacturer's datasheet for each component. Model numbers are usually printed on the device or packaging. Consider current rating, voltage rating, number of poles, and protection type when selecting replacements.

For integrated smart DB boxes, model numbers may also include energy monitoring or communication features. By understanding the component type and specifications, you can match the correct model number for replacements or upgrades in any distribution box.