Why Choose the ABB S203-Z4 Miniature Circuit Breaker?
The ABB S203-Z4 is a compact and reliable 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. Part of the ABB System pro M compact S200 range, it provides dependable modular protection for commercial, industrial and control panel installations.
With a Z tripping characteristic, the S203-Z4 is designed for circuits requiring fast magnetic tripping at low fault current levels. This makes it suitable for selected control circuits, sensitive loads and specialist electrical systems where rapid disconnection is important.
Rated at 4 A with a 3-pole configuration and 6 kA short-circuit breaking capacity, the ABB S203-Z4 provides effective protection for three-phase low-current circuits. Its DIN rail mounting design enables straightforward installation in distribution boards, machine panels and electrical enclosures.
Key Advantages
- 3-pole miniature circuit breaker for three-phase circuit protection.
- 4 A rated current suitable for low-current power and control circuits.
- Z curve tripping characteristic for fast response to lower fault currents.
- 6 kA breaking capacity for reliable short-circuit protection.
- Part of the ABB System pro M compact S200 range.
- DIN rail mounting for efficient panel and board installation.
Key Features
- ABB S203-Z4 miniature circuit breaker.
- S200 series modular protection device.
- 3 protected poles.
- 4 A rated current.
- Z characteristic trip curve.
- 6 kA rated short-circuit capacity.
- Thermal-magnetic tripping for overload and short-circuit protection.
- Compatible with ABB System pro M compact accessories.
Fast Acting Protection for Low-Current Three-Phase Circuits
Miniature circuit breakers such as the ABB S203-Z4 automatically disconnect a circuit when excessive current is detected. The thermal tripping mechanism provides overload protection, while the electromechanical tripping mechanism responds quickly to short-circuit faults.
The Z curve characteristic provides rapid magnetic tripping at lower fault current levels. This makes the S203-Z4 suitable for selected sensitive circuits, control systems and specialist equipment where fast disconnection helps protect connected devices and wiring.
Typical Applications
- Three-phase control circuits.
- Industrial automation panels.
- Sensitive electrical load protection.
- Machine building and OEM equipment.
- Commercial and industrial distribution boards.
- Low-current auxiliary and power circuits.
