ABB SC203-B16NA 2CDS253120R0165

ABB Miniature Circuit Breaker SC203-NA-B16

Description

The ABB SC203-NA-B16 is a high-quality Miniature Circuit Breaker (MCB) from the System pro M compact S200 series. It is designed for reliable protection against overloads and short circuits in a wide range of industrial and commercial applications. This 3P+N breaker ensures the safety and proper functioning of your electrical systems.

Specifications

• Manufacturer: ABB
• Model: SC203-NA-B16
• Order Code: 2CDS253120R0165
• Poles: 3P+N (Three-pole + Neutral)
• Rated Current: 16 A
• Tripping Characteristic: B-Curve
• Rated Voltage: 400V AC
• Rated Breaking Capacity: 6 kA
• Mounting: DIN Rail

Label Info

• EAN: 4016779650397
• Max Voltage: 253/440 V AC

Application

This MCB is ideal for protecting circuits in distribution boards, control panels, and other electrical installations. The B-curve characteristic makes it suitable for resistive or slightly inductive loads, such as lighting circuits and general-purpose outlets.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned circuit breaker, you are helping to avoid the emission of approximately 18 kg of CO2, which would have been generated during the production of a new one. This is a sustainable choice for your operations.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the difference between a B, C, and D curve circuit breaker?

The curve (B, C, or D) defines the tripping characteristic. B-curve breakers trip at 3-5 times the rated current and are used for resistive loads like lighting. C-curve (5-10 times) are for general inductive loads like motors. D-curve (10-20 times) are for high inrush current applications like transformers.

Is this SC203-NA-B16 suitable for protecting motor circuits?

While it can be used for very small motors, a B-curve breaker is generally not recommended for most motor applications due to the high starting (inrush) current. A C-curve or D-curve breaker is typically the better choice for motor protection.

What is the significance of the ‘6000’ marking on this MCB?

The ‘6000’ (or 6 kA) indicates the rated short-circuit breaking capacity. This is the maximum fault current the breaker can safely interrupt without being damaged. A 6 kA rating is standard for commercial and light industrial applications.

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Last Update: Friday, March 13, 2026