Circuit breaker Icu=50kA 4P C 10A HMX410

HMX410 circuit breaker is a four‑pole protection device designed for industrial and commercial installations where a high breaking capacity is required. It operates on AC networks with a voltage of 415 V and a frequency of 50–60 Hz, providing stable protection even under variable load conditions.

The C‑characteristic allows it to withstand short‑time current surges typical during the start‑up of motors, transformers or equipment with high inrush current—without unnecessary tripping. This is a key feature for installations where frequent starts are coupled with the risk of false trips.

Short‑circuit rating of 50 kA at 230 V and 400 V means the breaker can safely interrupt even extreme faults without risk of damage or explosion. Energy‑limiting class 3 and pollution degree 3 confirm its resistance to industrial conditions: dust, moisture, and airborne contaminants.

Surface‑mounting on a 35 mm DIN rail is standard, and a width of 6 modules allows compact integration in distribution boards. Screw terminals accept single‑core conductors up to 70 mm² and multi‑core conductors up to 50 mm², providing flexibility for both thin and thick wiring. The tightening torque is precisely set at 3.6 Nm—eliminating guesswork and reducing the risk of poor connections.

Operating temperature from –25 °C to +70 °C ensures reliable performance even in unheated rooms or near heat sources. IP20 protection class guards against finger contact but is not intended for outdoor mounting—this device is for indoor distribution panels.

Optional accessories (auxiliary contacts, trip units) enable integration with automation systems or status signalling. However, it does not simultaneously disconnect the neutral conductor, meaning it is not a fully isolating switch; a separate isolator is required for that purpose.

Mechanical endurance of 20 000 cycles and electrical endurance of 4 000 operations guarantee long‑term reliability—no need for replacement after a few years of intensive use. Total power loss (9.26 W at rated current) is low, reducing heat generation in the panel.

All parameters comply with IEC 60947-2 and IEC 60898-1.