S203-C40 3P 40A C-Curve Miniature Circuit Breaker 6kA | ABB

The Original New ABB S203-C40 is a 3‑pole miniature circuit breaker (MCB) from the System Pro M Compact S200 series, designed for reliable overcurrent and short‑circuit protection in residential, commercial, and industrial electrical installations. Rated at 40 A with a C‑tripping characteristic, it is ideal for circuits with moderate inrush currents such as inductive loads, small motors, transformers, and lighting systems. Featuring a 6 kA breaking capacity at 230/400 V AC, dual thermal‑magnetic tripping mechanisms, and a compact 3‑module width (52.5 mm), the S203‑C40 provides robust protection and space‑efficient installation on standard 35 mm DIN rails. Compliant with IEC/EN 60898‑1 and IEC/EN 60947‑2, it offers flexible application across global markets.

Core Engineering Highlights:
40 A rated current | 3‑pole (3P) configuration | C‑tripping characteristic (5‑10 In) | 6 kA breaking capacity at 230/400 V AC (Icn) | 10 kA ultimate breaking capacity (Icu) | 480Y/277 V AC rated voltage | 4 kV impulse withstand voltage (Uimp) | Thermal‑magnetic trip unit | 52.5 mm width (3 modules) | 88 x 69 x 52.5 mm | IP20 protection | –25°C to +55°C operating temperature

Key Features:

• Original New ABB S203‑C40 MCB (2CDS253001R0404)

• Current limiting design for enhanced protection of downstream equipment

• Dual tripping mechanisms: thermal for overload protection, electromagnetic for short‑circuit protection

• C‑curve characteristic (5‑10 In) for circuits with moderate inrush currents

• 6 kA breaking capacity (Icn) per IEC/EN 60898‑1; 10 kA ultimate breaking capacity (Icu) per IEC/EN 60947‑2

• Clear contact position indication (ON/OFF) in red/green

• Patented twin terminals with captive screws for secure wiring up to 35 mm²

• Busbar slot on the back for easy installation and optimal visibility

• 3‑module width (52.5 mm) for space‑efficient panel design

• IP20 finger‑proof protection

• Compliant with IEC/EN 60898‑1 and IEC/EN 60947‑2

• UL 1077 and CSA 22.2 No. 235 listed for North American applications

• RoHS compliant

Applications:

• Protection of final circuits in residential, commercial, and industrial distribution boards

• Overcurrent protection for lighting, socket outlets, and general‑purpose circuits

• Protection of inductive loads such as small motors, transformers, and coils

• Industrial control panels and distribution boards

• HVAC equipment and building automation systems

• Branch circuit protection in machinery and equipment

Technical Specifications:

System Compatibility:

• Compatible with standard 35 mm DIN rail mounting systems (TH35‑15 or TH35‑7.5)

• Suitable for use with ABB System Pro M Compact S200 series accessories, including:

  • Auxiliary contacts (S2C‑H6R, S2C‑H11L)

  • Shunt trips (S2C‑A1, S2C‑A2)

  • Undervoltage releases (S2C‑UA)

  • Busbars (PS2/1P, PS2/2P, PS2/3P, PS2/4P)

  • Locking devices (S2C‑L)

• Compatible with standard electrical distribution boards and panelboards

Related Products:

• S201‑C40 – 1P, 40A, C‑curve

• S202‑C40 – 2P, 40A, C‑curve

• S203‑C40 – 3P, 40A, C‑curve (current model)

• S204‑C40 – 4P, 40A, C‑curve

• S203‑B40 – 3P, 40A, B‑curve (for resistive loads)

• S203‑D40 – 3P, 40A, D‑curve (for high inrush loads)

• S2C‑H6R – Auxiliary contact for S200 series

• S2C‑A1 – Shunt trip for S200 series

• S2C‑UA – Undervoltage release for S200 series

• PS2/3P – 3‑phase busbar for S200 series

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. ABB is a trademark of ABB Group.