ABB S203P-Z16NA miniature circuit breaker from the System pro M compact S200P range featuring a 3+NP configuration, Z curve and 16 A rated current for sensitive electrical circuit protection.
The ABB S203P-Z16NA is a high-performance miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide dependable overload and short-circuit protection for low-voltage electrical installations. Featuring a Z-curve tripping characteristic and a 16 A rated current, it is ideally suited to sensitive electrical circuits requiring rapid magnetic tripping, including electronic equipment, PLC control systems and semiconductor devices.
This ABB miniature circuit breaker incorporates a 3+NP pole configuration, providing protection for three phases with an integrated neutral pole arrangement for three-phase plus neutral installations. The S200P range uses both delayed thermal and electromechanical tripping mechanisms, delivering reliable protection while limiting fault energy and helping to safeguard connected equipment.
Its compact DIN rail mounting design, high breaking capacity and robust construction make the S203P-Z16NA an excellent choice for professional electrical distribution boards, switchgear assemblies and industrial control panels. The manufacturer part number for this model is 2CDS283103R0468.
The ABB S203P-Z16NA automatically disconnects electrical circuits during overload or short-circuit conditions. Its thermal tripping mechanism protects against sustained overloads, while the Z-curve magnetic characteristic provides rapid disconnection where sensitive electronic equipment requires lower magnetic trip thresholds.
This makes the S203P-Z16NA particularly suitable for PLCs, instrumentation, electronic control systems, semiconductor devices and other applications where fast fault clearance helps protect valuable equipment and minimise downtime.
| Current | 16 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-Z16NA |
| Manufacturer part number | 2CDS283103R0468 |
| Product type | Miniature circuit breaker |
| Rated current | 16 A |
| Tripping characteristic | Z curve |
| Number of poles | 3+NP |
| Number of protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Rated ultimate breaking capacity (Icu) | 25 kA at 400 V AC |
| Rated service breaking capacity (Ics) | 12.5 kA at 400 V AC |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| EAN | 4016779594301 |
The ABB S203P-Z16NA protects sensitive three-phase electrical circuits against overloads and short circuits where rapid magnetic tripping is required.
The S203P-Z16NA has a rated current of 16 A.
A Z-curve MCB trips rapidly at relatively low magnetic fault currents, making it ideal for protecting sensitive electronic equipment, PLCs and semiconductor devices.
The breaker has a 3+NP configuration, providing protection for three phases with an integrated neutral pole arrangement.
The S203P-Z16NA is designed for DIN rail mounting inside electrical distribution boards, industrial switchgear and automation control panels.
ABB System pro M compact miniature circuit breakers are trusted by electricians, machine builders and industrial engineers for dependable circuit protection, excellent fault interruption capability and long-term reliability.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...