Onesto MCB 1P+N C25A 4.5 kA – DIN Rail Mount, IP20 & Single-Phase Protection

The Onesto miniature circuit breaker (1P+N/C25A/4.5kA) is designed to protect low-voltage networks from overload and short-circuit conditions, with occasional use as a switching device. Its C tripping curve suits general-purpose domestic and light commercial circuits.

With a rated current of 25A and a short-circuit breaking capacity of 4.5kA at 240V, it mounts on standard DIN 35mm rail inside indoor enclosures rated IP20.

Key Features

• 1P+N configuration — single pole plus neutral for single-phase circuits
• Rated current of 25A for general lighting and socket circuits
• 4.5kA short-circuit breaking capacity at 240V
• C tripping curve for standard resistive and mildly inductive loads
• Mounts on standard DIN 35mm rail for fast panel installation

Product Benefits

• Protects wiring and connected equipment from overload and short-circuit damage
• 1P+N design switches both line and neutral for safer isolation during service
• 4.5kA breaking capacity handles typical domestic fault currents
• Standard DIN rail mounting fits all common consumer units and distribution boards
• IP20 rating suits indoor distribution panels and enclosed cabinets

Technical Specifications

• Poles: 1P+N
• Rated Current: 25A
• Short-Circuit Capacity: 4.5kA
• Tripping Curve: C
• Rated Voltage: 240V
• Mounting: DIN 35mm rail
• Protection Rating: IP20 (indoor)

Why You'll Love It

• Reliable overload and short-circuit protection for everyday domestic circuits
• Slim DIN rail format saves space in crowded distribution boards
• C curve handles typical mixed loads without nuisance tripping
• Package includes 1x Onesto miniature circuit breaker 1P+N/C25A/4.5kA