The RP Onesto MCB is designed to protect low-voltage networks against overload and short-circuit conditions, and to perform occasional manual switching of the protected circuit. With two poles and a 25A rating, it suits split-phase or single-phase plus neutral feeds in distribution boards.

A C-curve trip characteristic allows for moderate inrush currents typical of lighting and small motor loads, while the 4.5kA breaking capacity covers typical residential and light commercial fault levels. The MCB mounts directly to standard DIN 35mm rail.

Key Features

• Two-pole construction for full isolation of phase and neutral, or two phases
• Rated current: 25A
• C tripping curve for general-purpose lighting and small motor loads
• Short-circuit breaking capacity: 4.5kA
• Mounts on standard DIN 35mm rail

Product Benefits

• Protects downstream wiring and devices from overload and short-circuit damage
• Two-pole switching fully isolates the circuit for safe maintenance
• C-curve avoids nuisance tripping on lighting and motor inrush
• 4.5kA breaking capacity suits typical domestic and small commercial installations
• DIN rail mounting drops into standard consumer units and distribution boards

Technical Specifications

• Number of Poles: 2
• Rated Current: 25A
• Breaking Capacity: 4.5kA
• Tripping Curve: C
• Rated Voltage: 240/415V
• Mounting: Standard DIN 35mm rail
• Protection Rating: IP20 (indoor use)

Why You'll Love It

• Drops into existing distribution boards on standard DIN rail
• C-curve handles real-world inrush from mixed lighting and motor loads
• Two-pole design supports proper isolation during maintenance
• Package includes 1× RP Onesto miniature circuit breaker two-pole/C25A/4.5kA