The RP-Onesto MCB is a single-pole miniature circuit breaker rated at 25A with a C-curve trip characteristic. It disconnects the circuit on sustained overload through its thermal element and on short circuit through its magnetic element, providing automatic protection for heavy-duty appliance circuits and main sub-feeds.

The 4.5kA short-circuit capacity suits typical residential supply impedance, and the 240/415V rating covers both single-phase and three-phase distribution panels. The standard 35mm DIN rail format integrates with consumer units and small distribution boards.

Key Features

• Single-pole construction protecting one live conductor
• 25A rated current sized for heavy-duty circuits and main sub-feeds
• C-curve magnetic trip suits mixed resistive and modest inductive loads
• 4.5kA short-circuit breaking capacity for residential supplies
• 35mm DIN rail mounting for standard panel integration

Product Benefits

• Thermal-magnetic mechanism protects against both slow overload and instant short circuit
• C-curve tolerates typical inrush from transformers and small motors
• 4.5kA capacity safely interrupts faults in domestic and light-commercial supplies
• Single-pole footprint occupies minimal panel space
• IP20 indoor rating suits installation inside a closed consumer unit

Technical Specifications

• Number of Poles: 1
• Rated Current: 25A
• Short-Circuit Capacity: 4.5kA
• Tripping Curve: C
• Rated Voltage: 240/415V
• Mounting: Standard 35mm DIN rail
• Protection Rating: IP20 (indoor)

Why You'll Love It

• Drop-in replacement or addition for any standard 35mm DIN consumer unit
• C-curve avoids nuisance tripping on switch-on inrush currents
• 25A rating is well sized for water heaters and high-load appliances
• Package includes 1× RP-Onesto MCB 1P/C25A/4.5kA