ABB Miniature Circuit Breaker 16A 3P+N K-Curve S203P-K16A NA

Description

The ABB S203P-K16A NA is a high-performance miniature circuit breaker (MCB) from the System pro M compact series. It provides reliable overcurrent protection for demanding industrial and commercial applications. This 3P+N device is rated for 16 Amperes and features a K-characteristic tripping curve, making it suitable for circuits with high inrush currents, such as motors and transformers.

Specifications

• Manufacturer: ABB
• Type: S203P-K16A NA
• Part Number: 2CDS283103R0467
• Poles: 3P+N (3-Pole + Neutral)
• Rated Current: 16 A
• Tripping Characteristic: K
• Rated Voltage (Ue): 400 V AC
• Rated Breaking Capacity (Icu) at 400V: 25 kA
• Rated Service Breaking Capacity (Ics) at 400V: 12.5 kA
• Standard: IEC 947-2

Label Info

• Model: S203P-K16A NA
• Order Code: 2CD S283 103 R0467
• EAN: 4016779593342

Application

This MCB is designed for protecting equipment like motors, transformers, and lamp groups in industrial control panels, distribution boards, and other electrical systems where high inrush currents are expected.

Country of Origin

Made in Germany

CO2 Impact

By purchasing this reused item, you contribute to a circular economy and help avoid the emission of approximately 20.0 kg of CO2 associated with the production of a new unit. This saving is comparable to the energy needed to charge a smartphone 2400 times.

Availability

This used item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?

What is the main difference between a K-curve and a C-curve circuit breaker?

A K-curve breaker is designed for circuits with high inrush currents, like motors and transformers, tripping between 8 and 12 times the rated current. A C-curve is a general-purpose curve for resistive and inductive loads with low inrush, tripping between 5 and 10 times the rated current.

Can this S203P-K16A NA be used in a single-phase system?

While it is a 3P+N breaker designed for three-phase systems, you could technically use one pole and the neutral for a single-phase circuit. However, this is not its intended application, and using a dedicated single-pole (1P+N) breaker is recommended for proper system design and panel balancing.

What is the significance of the IEC 947-2 standard versus IEC 60898-1?

IEC 947-2 (now part of the IEC 60947 series) is a standard for circuit breakers for industrial applications, which typically involves higher breaking capacities and more rigorous testing. IEC 60898-1 is for circuit breakers for household and similar installations. This S203P model, compliant with IEC 947-2, is built for more demanding industrial environments.

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Last Update: Friday, March 13, 2026