Overcurrent circuit breaker Icu=50kA 2P C 20A HMX220

Overcurrent circuit breaker HMX220 is a component that combines high breaking capacity with ease of installation — ideal where reliable overload and short‑circuit protection is required.

Its design is suitable for installation in industrial and secondary circuits, where the voltage reaches 415 V AC, and the inrush current of motor‑driven devices requires a C‑type characteristic — i.e., slower response to temporary currents without nuisance tripping.

Surface‑mount DIN‑rail installation enables quick and tidy integration into switchgear. Dimensions of 3 modules (53 × 90 × 70 mm) mean it occupies no more space than a standard breaker, and the aligned top and bottom terminals simplify cable routing — no need to twist or bend them to fit adjacent components.

Screw terminals accommodate both single‑core conductors (up to 70 mm²) and multi‑core cables (up to 50 mm²), providing flexibility for various cable types. The tightening torque of 3.6 Nm is precisely specified — no guesswork needed for proper screw pressure.

Connections are protected against accidental loosening, and their horizontal arrangement ensures stability even with large cross‑sections.

A breaking capacity of 50 kA at 230 V and 400 V means the breaker can handle the most extreme short‑circuit currents — those that may occur in high‑power networks or near transformers.

Energy‑limiting class 3 and pollution degree 3 confirm its resistance to industrial conditions: dust, moisture, particles — none of which affect its operation.

Operating temperature from –25 °C to +70 °C allows use even in unheated spaces or external installations (within switchgear with appropriate IP20 protection). There are no climatic restrictions — it performs equally well in a cold workshop and a hot machine room.

The trip unit operates mechanically and thermally — no electronics, no batteries. This means there are no failure points beyond the mechanism itself. Endurance of 20 000 mechanical cycles and 4000 electrical cycles guarantees long service life — even with frequent manual tripping or resetting.

There is no neutral pole for disconnection — it is a two‑pole breaker for phases only. This is standard for single‑phase circuits where neutral disconnection is not required.

Additional accessories (auxiliary contacts, trip units) are optional — not required for basic operation.

All of this is based on IEC 60947‑2 (60947-2) and IEC 60898‑1 (60898-1) standards — thus meeting both industrial and residential installation requirements.