CBI 40A 3P 3kA Circuit Breaker C3

• The CBI Electric QA(13) 3-Pole Miniature Circuit Breaker provides reliable and compact protection for three-phase AC circuits.
• Utilizing advanced hydraulic-magnetic technology, this MCB delivers precise tripping characteristics that remain consistent across a wide ambient temperature range (-40°C to +85°C), eliminating nuisance trips caused by heat.
• Occupying a minimal 39mm (3 x 13mm modules) on a mini rail, it offers simultaneous protection and switching for three live conductors (L1/L2/L3) up to 415 Vac.
• Compliant with key standards such as IEC/EN 60947-2 and SANS 556-1 (VC 8036), VDE approved, and CE certified, the QA(13) 3-pole breaker is a high-performance, space-saving solution for industrial machinery, commercial installations, HVAC systems, and other three-phase applications.

Features

• Type: AC Circuit Breaker, 3 Pole (3P - Three Phase Protection)

• Technology: Hydraulic-Magnetic (Ensures temperature-independent tripping)

• Rating Capability: 100% current rating capability across the full operating temperature range.

• Compact Footprint: Ultra-compact 39mm width (3 x 13mm modules).

• Mounting: Mini Rail Mount (Black Shell).

• Trip Indication: Linked mid-trip handle position provides clear visual indication of an electrical fault on any phase.

• Immediate Reset: Allows rapid restoration of power after clearing an overload or fault condition.

• Isolation: Suitable for use as a three-pole electrical isolator, ensuring safe maintenance downstream.

• Ratings: Available in current ratings from 5A up to 50A/60A (Certification varies by rating and standard).

• Voltage: Rated for 415 Vac operation (Line-to-Line).

• Interrupting Capacity:

  • 2.5 kA @ 415 Vac (VC 8036 / SANS 556-1 - Max 60A)

  • 3 kA @ 415 Vac (IEC/EN 60947-2 / VDE - Max 50A)

• Operating Temperature: Wide range from -40°C to +85°C.

• Durability: Designed to withstand 5G vibration and 16G shock; High mechanical endurance (10,000 operations).

• Safety Compliance: Adheres to VC 8036, SANS 556-1, IEC/EN 60947-2. VDE Approved, CE Certified.

• Busbar Compatible: Shell design simplifies installation on compatible busbar systems.

• Power Indicator: LED for power-on status indication.

Benefits

• Reliable Three-Phase Protection: Accurate hydraulic-magnetic mechanism protects all three phases simultaneously and is unaffected by temperature changes.

• Significant Space Savings: Extremely narrow 39mm profile allows for very high-density panel construction compared to standard 3-pole breakers.

• Enhanced Safety: Provides simultaneous disconnection of all three phases for safe isolation of equipment.

• Clear Fault Identification: Linked mid-trip handle quickly shows if the breaker tripped due to an overcurrent or short circuit.

• Minimal Downtime: Immediate reset capability reduces operational interruptions.

• Consistent & Predictable Performance: Precision tripping characteristics ensure reliable protection levels.

• Compliance for Industrial Use: Meets stringent international and local standards required for 415V three-phase applications.

• Robust & Long-Lasting: Designed for durability and long service life in demanding environments.

Technical Specifications

 Ideal Use

• Three-Phase Motor Protection: Protecting small to medium-sized three-phase motors (check trip curve suitability).

• Industrial Machinery: Providing main or branch circuit protection for 3-phase equipment.

• Commercial HVAC Systems: Protecting three-phase compressors, fans, or heating elements.

• Three-Phase Distribution Panels: Used as outgoing circuit breakers in compact industrial or commercial panels.

• Workshop Equipment: Protecting 3-phase machinery like lathes, mills, or large saws.

• Any 415V three-phase circuit requiring reliable overcurrent protection and isolation.

Tips

• Application Voltage: Ensure the 415 Vac rating is appropriate for the system voltage (Line-to-Line).

• Certification: Verify the specific current rating and interrupting capacity required against the relevant standard (SANS or IEC/VDE) for your application.

• Mounting: Designed for Mini Rail. Confirm rail type before installation.

• Wiring: Connect L1, L2, L3 phases to the respective poles. Use appropriate wire gauge (0.75-35mm²) capable of handling the load current per phase. Torque terminals to 2.5 Nm.

• Fault Indication: The linked mid-trip handle indicates a fault on any of the three protected phases.

• Temperature Stability: Highly suitable for panels or environments with wide temperature variations where thermal drift is undesirable.

• Isolation: Provides a dependable method for safely isolating all three phases of a downstream circuit for maintenance.