Why Choose the ABB S203M-D4NA Miniature Circuit Breaker?
The ABB S203M-D4NA is a high-performance 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200M range. Designed for reliable circuit protection in residential, commercial and industrial installations, it provides dependable protection against overloads and short circuits.
This ABB miniature circuit breaker is current limiting and uses two separate tripping mechanisms: a delayed thermal trip for overload protection and an electromechanical trip for short circuit protection. Its compact DIN rail design makes it suitable for modern distribution boards, switchgear assemblies and control panels.
With a 4 A rated current, Type D tripping characteristic, 3P+N configuration and 10 kA breaking capacity, the S203M-D4NA is particularly suitable for circuits with high inrush currents, including transformers, motors, power supplies and industrial control equipment.
Key Advantages
- High quality ABB System pro M compact S200M miniature circuit breaker.
- 3P+N configuration for three-phase circuits with neutral switching.
- Type D tripping curve suitable for high inrush current applications.
- 4 A rated current for smaller industrial and control circuits.
- 10 kA breaking capacity for robust fault protection.
- Current limiting design helps reduce stress during short circuit conditions.
Key Features
- ABB S200M Series miniature circuit breaker.
- Model: S203M-D4NA.
- Manufacturer Part Number: 2CDS273103R0041.
- Rated current: 4 A.
- Type D tripping characteristic.
- 3P+N pole configuration.
- 10 kA rated breaking capacity.
- Compatible with ABB System pro M compact accessories.
Reliable Protection for High Inrush Current Circuits
The ABB S203M-D4NA protects electrical circuits by disconnecting the supply when overload or short circuit conditions occur. The delayed thermal mechanism reacts to sustained overloads, while the electromechanical trip provides fast interruption under short circuit conditions.
Type D miniature circuit breakers are designed for applications where high starting currents are expected. This makes the S203M-D4NA suitable for transformer-fed circuits, motor loads, power supplies and industrial equipment where a standard Type B or Type C breaker may trip unnecessarily during start-up.
Typical Applications
- Industrial control panels.
- Three-phase distribution boards.
- Transformer and power supply circuits.
- Motor control and automation systems.
- Machine building and OEM equipment.
- Commercial and industrial electrical installations.
