Parameter Specification
Product Line / Series System M (M200 S-series) - MSxxx compact series
Device Type Miniature Circuit Breaker (MCB) - 1P+N (Single Pole + Neutral)
Protected Poles 1 (Phase/Live only)
Switched Poles 2 (Phase and Neutral)
Rated Current (Iₙ) 2.5 A
Rated Voltage (Uₙ) 230/400 V AC (Phase to Neutral / Phase to Phase)
Rated Frequency 50/60 Hz
Breaking Capacity (Icn) 10 kA (at 230/400V AC)
Tripping Characteristic C Curve (Instantaneous trip between 5x and 10x Iₙ). Suitable for applications with moderate inrush currents. For a 2.5A device, this is often used for small transformer-fed circuits (e.g., doorbells, control power) or specific lighting loads.
Mechanical Endurance ≥ 20,000 operations
Electrical Endurance ≥ 10,000 operations (at Iₙ)
Mounting 35 mm symmetrical DIN rail (EN 60715)
Width 18 mm (This is a key advantage: it occupies the space of a single standard module, despite being a 1P+N device).
Terminal Torque 1.5 Nm (for rated cross-section conductors)
Connection Capacity Typically up to 16 mm² (Confirm with official datasheet)
Standards Compliance IEC/EN 60898-1
Ambient Temperature (Operation) -25°C to +55°C
The ABB MS116-2.5 is a miniature circuit breaker (MCB) from the compact MSxxx series within the broader System M (M200 S-series). It is a highly space-saving device designed for final circuit protection.