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ABB S203-Z8NA MCB – S200 – 3P+N – Z – 8A
ABB S203-Z8NA miniature circuit breaker with 8 A rating, Z trip characteristic and 3 protected poles plus neutral for sensitive industrial and commercial electrical circuits.
£117.52
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.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 8 A | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200 | |
| Model | S203-Z8NA | |
| Product type | Miniature circuit breaker | |
| Rated current | 8 A | |
| Tripping characteristic | Z | |
| Poles | 3 protected poles + neutral | |
| Rated operational voltage | Up to 440 V AC | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 6 kA (IEC/EN 60898-1) | |
| Protection | Thermal magnetic | |
| Mounting type | DIN rail | |
| Terminal type | Screw terminals | |
| Protection rating | IP20 | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-Z8NA used for?
The ABB S203-Z8NA provides overload and short circuit protection for sensitive electronic equipment, automation systems and industrial control circuits.
What does the Z trip characteristic mean?
The Z characteristic is designed for circuits with very low inrush currents, providing rapid protection for sensitive electronic devices and semiconductor equipment.
How many poles does this circuit breaker have?
The S203-Z8NA features 3 protected poles plus a neutral pole, making it suitable for three-phase systems with neutral.
Can the breaker be mounted on a DIN rail?
Yes. The ABB S203-Z8NA is designed for secure installation on standard DIN rails used in electrical distribution and control panels.
Is the S203-Z8NA compatible with ABB accessories?
Yes. It is compatible with ABB auxiliary contacts, shunt trips, undervoltage releases and other System pro M compact accessories.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted by electrical engineers, machine builders and panel manufacturers for dependable circuit protection, high product quality and long-term reliability.
