Circuit breaker QOLTEC C40 40A 3P — 40 A, 3-pole miniature circuit breaker

The QOLTEC C40 40A 3P is a compact three-pole miniature circuit breaker designed to protect three-phase electrical circuits from overloads and short circuits. Rated for a continuous current of 40 A, this breaker interrupts fault currents to prevent damage to wiring, motors and connected equipment in residential and light commercial distribution panels. Its compact footprint allows integration into standard DIN-rail enclosures where reliable, repeatable circuit protection is required.

Advantages

The QOLTEC C40 40A 3P delivers fast disconnection for fault conditions while maintaining stable performance under normal load. Its three-pole design ensures simultaneous interruption of all phases, reducing the risk of phase imbalance and equipment stress. The miniature form factor conserves panel space and simplifies installation in typical distribution boards. Constructed to industry norms for thermal-magnetic protection, the device combines overload and short-circuit response in a single unit for straightforward circuit safeguarding.

Suitable for

• Protection of three-phase branch circuits in residential distribution panels
• Safeguarding small motors and light commercial equipment
• Protection of wiring and connected loads in workshops and small businesses
• Use in compact DIN-rail enclosures where space is limited

Key specifications

• Rated current: 40 A
• Poles: 3 (three-pole)
• Tripping characteristic: type C (thermal-magnetic)
• Application: three-phase circuit protection (overload and short-circuit)
• Mounting: DIN-rail compatible miniature breaker form
• Typical uses: protection of motors, wiring and connected equipment

How to use

Install the breaker into a compatible DIN-rail distribution board following local electrical codes and regulations. Ensure the breaker is mounted in the correct orientation and that the supply and load conductors are connected to the appropriate terminals. Verify tight, secure terminations and correct wire sizes for the 40 A rating. After installation, test the circuit under controlled conditions to confirm proper operation and tripping behavior. Routine inspection and maintenance should be performed by qualified personnel.

Usage recommendations

Select wiring and protective devices upstream and downstream that match the rated current and fault level of the installation. Coordinate the QOLTEC C40 40A 3P with upstream overcurrent protection and ensure compatibility with connected motor starting currents and inrush characteristics to avoid nuisance trips.