XL8-63 4P 40A 400V AC Curve C Miniature Circuit Breaker

Product Description

The Magnetothermic XL8-63 4P 40A 400V AC Curve C is a four-pole modular circuit breaker designed for comprehensive protection of three-phase lines with neutral in low voltage systems. It combines thermal tripping against sustained overloads and instantaneous magnetic tripping against short circuits, ensuring service continuity and the safety of wiring and receivers. Its Curve C characteristic offers tolerance to moderate inrush currents typical of motors, compressors, pumps, and power electronics, preventing unwanted tripping without compromising fast response to real faults. With robust construction, self-extinguishing materials, and a lever with clear ON/OFF indication, it integrates neatly into professional panels for residential, tertiary, light industrial, or solar self-consumption applications on the AC side.

Main Features

• 4 poles (L1-L2-L3-N), 40 A: simultaneous disconnection of the three phases and the neutral.
• 400 V~ 50/60 Hz: suitable for standard low voltage three-phase distribution.
• Curve C: immunity to moderate inrush currents (motors/electronics) and effective response to short circuits.
• Breaking capacity up to 6 kA under standard conditions, an adequate level for most LV panels.
• Format DIN 35 mm with quick mounting, status indicator, and reliable operation.
• High-quality screw terminals for rigid or flexible cable and compatibility with busbar combs.

Advantages or Benefits

• Complete circuit protection: limits fault energy and prevents damage to conductors and equipment.
• Greater service continuity thanks to Curve C, which reduces nuisance tripping due to inrush currents.
• Quick and tidy installation on DIN rail, with accessibility for maintenance and verification.
• Compatibility with residual current devices and SPD to configure selective and effective protection chains.
• High durability due to its modular design, precise mechanism, and self-extinguishing materials.

Purpose or Applications

Designed for high-demand three-phase branch circuits: subpanels, power lines, pumps and treatment plants, HVAC, light machinery, AC distribution of three-phase inverters, and general services in SMEs and commercial premises. Suitable for advanced residential, tertiary, and light industrial environments where reliability, selectivity, and ease of operation are required.

Technical Specifications

Compatibilities

Direct integration in HT-12WAYS, HT-18WAYS, and HT-24WAYS sealed panels. Can be coordinated with residual current devices XID-63 4P Type A 30 mA, AC Type II surge protectors, isolators, contactors, and distribution terminal blocks. Select conductor cross-sections and coordinate selectivity with upstream protections according to available short-circuit calculation and applicable standards.

The Magnetothermic XL8-63 4P 40A 400V AC Curve C provides power, reliability, and professional installation to protect demanding three-phase branch circuits with a fast and safe response.