Siemens MCCB 3P 800–1000 A 85 kA | Molded Case Circuit Breaker – Adjustable

This Siemens model is a 3-pole 800–1000 A molded case circuit breaker with 85 kA breaking capacity and an electronic trip unit. It protects main incomers, feeders, motors and distribution boards against overload and short circuit in residential towers, commercial buildings and factories. Several current ratings are available under this listing.

Key features

• Electronic protection – thermal and magnetic thresholds can be set to the load
• Breaking capacity 85 kA suitable for main and sub-main boards
• Rotary or toggle operation with clear ON/OFF/TRIP indication
• Wide range of accessories: shunt trip, undervoltage release, auxiliary contacts, rotary handles and motor operators
• Front-connected terminals for cables or busbars

Technical specifications

Available versions

Current Rating: 400 - 1000 A, 320 - 800 A.

Typical applications

• Main incomers of buildings and distribution boards
• Feeders to sub-main boards, elevators and pumps
• Generator and transformer outgoing circuits
• Motor control centres and industrial panels
• ATS and changeover panels

Selection and installation tips

Select the MCCB rated current from the design load and cable ampacity, check that the breaking capacity (Icu) exceeds the prospective short-circuit current at the installation point, and choose an adjustable or electronic trip unit when selectivity with downstream breakers is required.

Frequently asked questions

What is the difference between an MCCB and an MCB?

MCCBs cover higher currents (typically 16–1600 A), higher breaking capacities and often adjustable protection, while MCBs are modular devices up to about 125 A for final circuits.

What does Icu mean?

Icu is the ultimate short-circuit breaking capacity – the highest fault current the breaker can safely interrupt.

Buy Siemens MCCB in Egypt

Spark Egypt supplies the original Siemens molded case circuit breaker (MCCB) with a VAT tax invoice for electrical contractors, panel builders, factories, consultants, retailers and maintenance teams. Delivery is available to Cairo, Giza, New Cairo, 6th of October, Sheikh Zayed, the New Administrative Capital, Alexandria, the Delta, the Canal cities and Upper Egypt. Our technical team can confirm ratings, compatible accessories and equivalent references before you order, and project quantities are quoted on request.