ABB S203MT-Z32NA miniature circuit breaker, a 32 A 3-pole plus neutral Z curve MCB from the ABB S200MT range for industrial, traction and railway applications.
£367.97
The ABB S203MT-Z32NA is a compact and high-performance miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in low-voltage electrical installations. As part of the ABB S200MT miniature circuit breaker range, it has been specifically developed for demanding industrial, traction and railway applications where dependable circuit protection and long service life are essential.
Featuring a Z curve tripping characteristic, the S203MT-Z32NA is ideally suited to sensitive electrical circuits requiring rapid magnetic tripping during fault conditions. Its advanced current limiting design reduces fault energy, helping protect cables, control equipment and connected electrical devices while improving overall system safety.
With a rated current of 32 A and a 3-pole plus neutral configuration, the ABB S203MT-Z32NA is ideal for protecting three-phase systems where the neutral conductor switches together with the protected phases. Its DIN rail mounting format enables straightforward installation inside distribution boards, control panels, switchgear assemblies and railway electrical equipment.
Miniature circuit breakers such as the ABB S203MT-Z32NA automatically disconnect electrical circuits whenever overload or short-circuit faults occur. This helps prevent damage to wiring, switchgear and connected equipment while improving the safety and reliability of electrical installations.
The Z curve characteristic provides very fast magnetic tripping at relatively low fault current levels, making the device particularly suitable for protecting sensitive electronic equipment, signalling systems, PLC control circuits and specialised industrial applications requiring rapid fault clearance.
| Current | 32 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z32NA |
| Order code | 2CDS273106R0538 |
| EAN | 4016779771825 |
| Product type | Miniature circuit breaker |
| Rated current | 32 A |
| Number of poles | 3 protected poles + neutral |
| Total pole configuration | 4 pole |
| Tripping characteristic | Z curve |
| Rated operational voltage | 400 / 440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated frequency | 50 / 60 Hz |
| Breaking capacity | 10 kA |
| Rated ultimate breaking capacity (Icu) | 15 kA at 400 / 440 V AC |
| Current limiting class | Class 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Built-in depth | approx. 69 mm |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.5 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203MT-Z32NA provides overload and short-circuit protection for three-phase electrical circuits, particularly those supplying sensitive electronic and control equipment.
The ABB S203MT-Z32NA has a rated current of 32 A.
The Z curve provides very fast magnetic tripping, making it suitable for sensitive circuits where rapid disconnection during fault conditions is essential.
Yes. It features three protected poles together with a switched neutral, providing a 3P+N configuration for three-phase electrical systems.
It is commonly installed on DIN rail inside control panels, distribution boards, switchgear assemblies and railway electrical equipment.
ABB S200MT miniature circuit breakers are trusted by panel builders, railway engineers and industrial electricians for dependable circuit protection in demanding low-voltage applications.
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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...