Why Choose the ABB S203-Z8NA Miniature Circuit Breaker?
The ABB S203-Z8NA is a high-performance 3-pole + neutral miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200 series. Designed to provide dependable overload and short circuit protection, it is ideal for industrial control panels, automation systems and specialist electronic equipment that requires highly sensitive circuit protection.
Featuring a Z trip characteristic, the S203-Z8NA is specifically designed for circuits with very low inrush currents, making it particularly suitable for protecting sensitive electronic devices, PLCs, measurement equipment and semiconductor circuits. Its current limiting technology helps minimise fault energy, improving equipment protection and overall system reliability.
With an 8 A rated current, 3 protected poles plus neutral and DIN rail mounting, the ABB S203-Z8NA delivers reliable protection while remaining fully compatible with ABB accessories including auxiliary contacts, shunt trips and undervoltage releases.
Key Advantages
- Reliable 3-pole + neutral miniature circuit breaker.
- 8 A rated current for industrial and commercial applications.
- Z trip characteristic for highly sensitive electronic circuits.
- Thermal and magnetic tripping mechanisms provide dependable protection.
- Current limiting design reduces fault energy.
- DIN rail mounting for straightforward installation.
Key Features
- ABB System pro M compact S200 series.
- Model: S203-Z8NA.
- Rated current: 8 A.
- Configuration: 3 protected poles + neutral.
- Z tripping characteristic.
- Thermal overload and magnetic short circuit protection.
- Current limiting construction.
- DIN rail mounting.
- Finger-safe screw terminals.
- Compatible with ABB auxiliary contacts, shunt trips and undervoltage releases.
Reliable Protection for Sensitive Electrical Circuits
The ABB S203-Z8NA combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard sensitive electrical equipment. The Z tripping characteristic provides rapid operation at relatively low fault currents, making it particularly suitable for protecting electronic control systems and semiconductor devices.
As part of ABB's proven System pro M compact range, this miniature circuit breaker delivers dependable performance, straightforward installation and long service life across industrial, commercial and OEM electrical installations.
Typical Applications
- PLC and automation systems.
- Electronic control equipment.
- Instrumentation and measurement circuits.
- Industrial control panels.
- Semiconductor protection.
- OEM machinery and specialist electrical installations.
