⚡ Distribution Box

MCB Distribution Board

An MCB distribution board is a distribution box designed to house miniature circuit breakers (MCBs) on a DIN rail, distributing incoming supply into multiple protected final circuits. It provides overcurrent and short-circuit protection per circuit plus a main isolator, and is typically built to IEC 61439.

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⚠️ Note: MCB ratings, board rating, and circuit design must be determined by a qualified electrician per local regulations. Protective devices are often supplied separately; confirm what is included. Values are indicative.

Typical specification

Property	Typical value
Type	DIN-rail MCB distribution board
Ways/modules	Sized by number of 18mm module ways/poles (typical/indicative)
Material	Sheet-steel or insulated plastic enclosure (varies by model)
IP rating	Commonly IP30 to IP42 indoor; higher IP options for demanding locations (indicative)
Main switch	Main switch/isolator; RCD or RCBO options where required
Mounting	Surface or flush wall mounting; DIN rail internally
Standard	IEC 61439; MCBs to IEC 60898 (indicative; confirm per model)

Indicative / typical values for planning — actual products vary by manufacturer and standard. Confirm the final spec sheet before ordering; we do not publish fixed prices, request a quote for current offers.

Applications

Residential, light commercial, and small industrial installations for distributing and protecting multiple final circuits via DIN-rail MCBs.

What to specify when you request a quote

Number of module ways/poles and required spare capacity
Main switch or RCD/RCBO arrangement and busbar rating
Enclosure material, IP rating, and mounting type

Related in Distribution Box

Consumer Unit Metal Enclosure ← All distribution box

FAQ

What is the difference between an MCB distribution board and a consumer unit?

An MCB distribution board is a general board built to accept DIN-rail MCBs and can serve residential, commercial, or small industrial use; a consumer unit is the domestic form of a distribution board. There is significant overlap in construction.

Can it be fitted with RCBOs instead of MCBs?

Many DIN-rail boards accept RCBOs or RCDs in place of, or alongside, MCBs, subject to module width and busbar compatibility. Verify device compatibility with the specific board.

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