Schneider Electric EZ9F34450 Easy9 MCB 4P 50A 4.5kA Miniature Circuit Breaker

The Schneider Electric EZ9F34450 is an Easy9 series 4-pole miniature circuit breaker (MCB) rated at 50 A and 400 V, delivering 4500 A (4.5 kA) breaking capacity for reliable overload and short-circuit protection in residential and light commercial installations. Designed for DIN rail mounting, the EZ9F34450 offers a compact modular footprint that integrates seamlessly into standard distribution boards, making it a practical choice for engineers and panel builders seeking dependable protection in a space-efficient package.

Technical Specifications

Applications & Use Cases

• Residential Distribution Boards: Provides branch circuit protection in domestic consumer units and apartment distribution panels.
• Light Commercial Installations: Suitable for small offices, retail units, and light industrial premises requiring compact and reliable MCB protection.
• 3-Phase + Neutral Protection: The 4-pole configuration simultaneously interrupts all three phases and the neutral conductor, ensuring complete circuit isolation.
• DIN Rail Panel Assemblies: Modular design integrates directly into standard 35 mm DIN rail enclosures alongside auxiliary devices and residual current devices.