Why Choose the ABB S202D4 Miniature Circuit Breaker?
The ABB S202D4 is a reliable 2-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. Part of the established ABB System pro M compact S200 series, it combines thermal and electromagnetic tripping mechanisms to provide dependable protection for cables, equipment and connected loads.
Featuring a D curve tripping characteristic, the S202D4 is suitable for circuits that experience high temporary inrush currents during start-up. This makes it particularly useful for transformers, motors, solenoids, compressors and other inductive equipment that could cause nuisance tripping when used with a more sensitive circuit breaker.
With a rated current of 4 A, a 2-pole configuration and a rated operational voltage of 400 V AC, the ABB S202D4 provides compact and effective protection for industrial, commercial and specialist electrical installations. Its DIN rail format enables straightforward installation within distribution boards, control panels and machinery enclosures.
Key Advantages
- Reliable overload and short-circuit protection for electrical circuits.
- 4 A rated current for low-current control and equipment circuits.
- D curve tripping characteristic suitable for loads with high starting currents.
- 2-pole configuration for simultaneous circuit isolation.
- 6 kA breaking capacity in accordance with IEC/EN 60898-1.
- Compact DIN rail design for efficient panel installation.
Key Features
- ABB System pro M compact S200 series.
- 4 A rated current.
- 2-pole configuration.
- D trip characteristic.
- 400 V AC rated operational voltage.
- 6 kA rated short-circuit capacity.
- Thermal tripping mechanism for overload protection.
- Electromagnetic tripping mechanism for short-circuit protection.
- Current-limiting operation to reduce fault energy.
- Standard DIN rail mounting for distribution boards and control panels.
Reliable Protection for High Inrush Loads
The ABB S202D4 automatically disconnects a circuit when excessive current is detected. Its delayed thermal mechanism responds to sustained overload conditions, while its electromagnetic mechanism provides rapid protection during short circuits.
The D curve characteristic permits higher temporary starting currents than B or C curve breakers, helping prevent unnecessary disconnection when energising equipment such as transformers and motors. This makes the S202D4 a practical choice for specialist control circuits and industrial equipment with demanding start-up characteristics.
Typical Applications
- Industrial control panels and machinery.
- Transformers and power supplies.
- Motors, pumps and compressors.
- Solenoids and inductive control equipment.
- Commercial electrical distribution systems.
- OEM machinery and automation equipment.
