Why Choose the ABB S203-D2 Miniature Circuit Breaker?
The ABB S203-D2 is a compact and reliable three-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the established ABB System pro M compact S200 series, it provides dependable circuit protection for residential, commercial and industrial electrical installations.
This miniature circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromagnetic tripping mechanism for rapid short-circuit protection. Its D tripping characteristic is suitable for circuits with high inrush currents, including transformers, motors, control equipment and other inductive electrical loads.
With a rated current of 2 A, a three-pole configuration and a rated short-circuit capacity of 6 kA at 400 V AC, the S203-D2 is well suited to low-current three-phase circuits. Its modular construction allows straightforward installation on standard 35 mm DIN rails inside electrical distribution boards and control panels.
Key Advantages
- Reliable overload and short-circuit protection for three-phase circuits.
- 2 A rated current for low-current electrical equipment and control circuits.
- D-curve tripping characteristic suitable for loads with high starting currents.
- 6 kA short-circuit breaking capacity at 400 V AC.
- Clear red and green contact-position indication.
- Compact DIN rail mounting for efficient panel installation.
Key Features
- ABB System pro M compact S200 series.
- Three-pole miniature circuit breaker.
- 2 A rated current.
- D tripping characteristic.
- 400 V AC rated operational voltage according to IEC/EN 60898-1.
- 6 kA rated short-circuit capacity at 400 V AC.
- Thermal overload and electromagnetic short-circuit tripping mechanisms.
- Failsafe bi-directional screw terminals.
- Red ON and green OFF contact-position indication.
- Mounting on standard TH35 DIN rail.
Reliable Protection for High-Inrush Electrical Loads
Miniature circuit breakers such as the ABB S203-D2 automatically disconnect an electrical circuit when excessive current is detected. Thermal protection responds to sustained overload conditions, while the electromagnetic mechanism reacts rapidly to high short-circuit currents.
The D-curve characteristic permits higher momentary current peaks before magnetic tripping occurs. This makes the S203-D2 particularly suitable for electrical equipment that can draw a significant inrush current during start-up, while still providing reliable protection for conductors and connected components.
Typical Applications
- Three-phase industrial control circuits.
- Small motors and inductive electrical loads.
- Transformers and power supplies.
- Automation equipment and machinery.
- Commercial and industrial distribution boards.
- Electrical control panels and switchgear assemblies.
