The RP-Onesto MCB is a single-pole miniature circuit breaker rated at 20A 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 heavier socket circuits and dedicated appliance 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
• 20A rated current sized for dedicated outlets and small appliances
• 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: 20A
• 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
• 20A rating is well sized for kitchen appliances and heavier socket feeds
• Package includes 1× RP-Onesto MCB 1P/C20A/4.5kA