The RP Onesto MCB (3P/C40A/4.5kA) is a three-pole miniature circuit breaker designed to protect low-voltage networks from overload and short circuits, with the option for occasional manual switching. The C tripping curve handles standard inductive loads found in residential and small commercial circuits.

Rated at 40A with a 4.5kA breaking capacity at 415V, it mounts on standard 35mm DIN-rail inside an indoor distribution board.

Key Features

• Three-pole (3P) configuration for three-phase circuits
• 40A rated current with C-curve trip characteristic
• 4.5kA short-circuit breaking capacity
• 415V rated voltage for standard three-phase networks
• 35mm DIN-rail mount for distribution boards

Product Benefits

• Protects wiring and downstream equipment from overload damage
• Interrupts short-circuit faults up to 4.5kA before they propagate
• C-curve allows typical motor and lighting inrush without nuisance tripping
• Acts as an occasional manual isolator alongside its protective role
• Standard DIN-rail format integrates with any compliant panel

Technical Specifications

• Poles: 3 (three-pole)
• Number of Elements: 3
• Rated Current: 40A
• Breaking Capacity: 4.5kA
• Tripping Curve: C
• Rated Voltage: 415V
• Mounting: Standard 35mm DIN-rail
• IP Rating: IP20 (indoor)

Why You'll Love It

• One device delivers overload, short-circuit, and manual isolation in a single 3P unit
• 4.5kA capacity suits typical domestic and small commercial supplies
• Fits any standard 35mm DIN-rail consumer unit without adapters
• Package includes 1x RP Onesto Miniature Circuit Breaker 3P/C40A/4.5kA