Onesto 1P 3kA MCB C-Curve DIN

• The Onesto Single Pole 3kA C-Curve Miniature Circuit Breaker (MCB) series offers essential circuit protection for residential and light commercial applications.
• These MCBs are designed to safeguard electrical circuits against overcurrents and short circuits, featuring a C-Curve tripping characteristic suitable for general-purpose loads.
• With a 3kA breaking capacity, they provide reliable performance in installations where lower fault current levels are anticipated.
• Compliant with IEC60898-1 standards, this range provides a cost-effective and dependable solution for everyday circuit protection needs.

Features

• Single Pole (1P) configuration.
• Rated short-circuit breaking capacity (Icu & Ics): 3kA.
• C-Curve tripping characteristic: Suitable for general purpose, resistive, and moderately inductive loads.
• Comprehensive range of current ratings: 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A.
• Thermo-magnetic trip mechanism for effective overload and short-circuit protection.
• Standard Compliance: IEC60898-1.
• Rated Operational Voltage (Ue): 240/415V AC (for 1P).
• Rated Insulation Voltage (Ui): 415V.
• Rated Impulse Withstand Voltage (Uimp): 4kV.
• Protection Index: IP20.
• Designed for easy DIN rail mounting.

Benefits

• Reliable Protection: 3kA breaking capacity provides adequate protection for circuits with lower prospective fault currents, common in residential and small commercial setups.
• Versatile Application: C-Curve characteristic is ideal for a wide variety of common loads, including lighting circuits, general power outlets, and small appliances, minimizing nuisance tripping.
• Dual Protection Mechanism: Thermo-magnetic trip unit offers precise protection against both sustained overloads (thermal) and immediate short circuits (magnetic).
• International Standard Compliance: Adherence to IEC60898-1 ensures recognized quality, safety, and performance.
• Cost-Effective Solution: Offers a balance of performance and value for applications where a higher breaking capacity is not required.
• Wide Current Range: Extensive selection of current ratings allows for appropriate selection for various circuit demands.
• Simplified Installation: Standard DIN rail compatibility ensures quick and convenient mounting in most consumer units and distribution boards.

In-Depth Technical Specifications

Ideal Use

• Residential buildings for protecting lighting circuits, socket outlets, and individual appliances.
• Small commercial premises such as shops, small offices, and workshops for general circuit protection.
• Consumer units and distribution boards in domestic and light commercial installations.
• Circuits where the prospective short circuit current is confirmed to be below 3kA.
• Cost-sensitive projects requiring reliable IEC-compliant protection.

Tips

• Fault Level Verification: Crucially, ensure the 3kA breaking capacity is sufficient for the installation's prospective short circuit current (PSCC). If the PSCC exceeds 3kA, a higher-rated MCB (e.g., 6kA or 10kA) must be used.
• Correct Amperage Selection: Always choose an MCB with a current rating appropriate for the connected load and cable size to prevent nuisance tripping and ensure adequate protection.
• Professional Installation: Ensure installation is performed by a qualified electrician in accordance with local electrical codes and regulations.
• Secure Connections: Properly torque all terminal connections to the manufacturer's specifications.
• Environmental Considerations: While IP20 rated for finger protection, ensure the MCB is installed within a suitable enclosure to provide protection against dust and moisture if required by the environment.