ABB S303P-Z16NA miniature circuit breaker with a 16 A rated current, Type Z tripping characteristic, 3P+N configuration and 25 kA breaking capacity for sensitive industrial circuit protection.
£191.60
The ABB S303P-Z16NA, product code 2CDS383103R0468, is a high-performance miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. Part of the proven ABB System pro M compact S300P series, it combines precise fault detection, high breaking capacity and reliable long-term performance in demanding applications.
Featuring a Type Z tripping characteristic, the S303P-Z16NA provides a sensitive instantaneous response suited to circuits containing electronic components, semiconductor devices, instrumentation and industrial automation equipment. Its thermal release protects against sustained overloads, while the magnetic release rapidly disconnects the circuit during short-circuit conditions.
With a rated current of 16 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, this circuit breaker is suitable for three-phase systems that require three protected phases and simultaneous neutral switching. Its compact DIN rail format, integrated trip indication and compatibility with ABB System pro M compact accessories support efficient panel design, installation and maintenance.
Miniature circuit breakers disconnect electrical circuits automatically when excessive current is detected. The ABB S303P-Z16NA combines delayed thermal tripping for overload protection with rapid electromagnetic tripping for short-circuit protection, helping safeguard cables, control equipment and connected devices.
The sensitive Type Z characteristic makes this MCB particularly suitable for circuits where relatively low fault currents could damage electronic components. It is therefore well suited to PLC systems, instrumentation, semiconductor equipment and industrial control applications where rapid fault clearance and service continuity are important.
| Current | 16 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-Z16NA |
| Product ID | 2CDS383103R0468 |
| Product type | Miniature circuit breaker |
| Rated current | 16 A |
| Tripping characteristic | Type Z |
| Pole configuration | 3P+N |
| Total number of poles | 4 |
| Number of protected poles | 3 |
| Rated operational voltage | 240 / 415 V AC |
| Maximum AC system voltage | 480Y / 277 V AC |
| Maximum DC voltage | 125 V DC |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Frequency | 50 / 60 Hz |
| Ultimate short-circuit breaking capacity | 25 kA |
| Protection rating | IP20, up to IP40 in a suitable enclosure |
| Mounting type | DIN rail mounting |
| Terminal type | Fail-safe screw terminals |
| Maximum solid conductor capacity | 35 mm² |
| Maximum flexible conductor capacity | 25 mm² |
| Operating temperature | -40 to +70 °C |
| Dimensions (H × W × D) | approximately 88 × 70 × 69 mm |
| Weight | approximately 0.50 kg |
| EAN | 4016779076920 |
| Applicable standards | IEC/EN 60947-2, IEC/EN 60898-1, UL 1077 and CSA 22.2 No. 235 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S303P-Z16NA protects sensitive three-phase industrial circuits, electronic equipment and automation systems against overloads and short circuits.
The S303P-Z16NA has a rated current of 16 A.
Type Z circuit breakers have a sensitive instantaneous trip response and are commonly used to protect electronic devices, semiconductor equipment, PLCs and instrumentation circuits.
The breaker provides an ultimate short-circuit breaking capacity of 25 kA.
The breaker mounts on a standard DIN rail inside an electrical distribution board, industrial control panel or machinery enclosure.
ABB System pro M compact miniature circuit breakers are widely specified by electrical engineers, panel builders and automation specialists for dependable circuit protection, high breaking capacity and compatibility with modern industrial installations.
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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...