ABB Circuit Breakers

ABB circuit breakers cover protection needs from miniature branch circuits to large switchboards. This collection brings together MCB/RCBO/RCCB for final distribution, MCCB for higher breaking capacities and frame sizes, ACB for main incomers/bus ties, and motor-protection breakers for starters and panels.

What you’ll find here

• Miniature Circuit Breakers (MCB): S200/S200M families for B/C/D curves and common pole counts.

• Residual Protection: RCBO (DS201/DS202) and RCCB (F200 series) for combined over-current + earth-leakage or leakage-only protection.

• Molded-Case Circuit Breakers (MCCB): Tmax XT (XT1–XT7) and legacy SACE Tmax T (T1–T7) frames, with thermomagnetic or electronic trips.

• Air Circuit Breakers (ACB): Emax 2 for main switchboard applications, advanced protection/communication.

• Motor Protection CBs: MS series (MS116/MS132/MS165) for manual motor starters and short-circuit/overload protection.

Selection notes (engineering)

• Application & curve: choose B/C/D curves in MCBs to match inrush; coordinate with upstream devices.

• Interrupting rating: verify Icu/Ics (IEC) or interrupt rating (UL) against available fault current.

• Frame & trip: for MCCB/ACB, size frame (In), pick trip unit (thermal-magnetic vs electronic), and set protections (LSI/LSIG) as needed.

• Residual current: decide RCCB vs RCBO by whether over-current protection must be integrated.

• Standards/labels: ABB offers IEC and UL/CSA variants—match your market and panel standard.