ABB S303P-Z20NA miniature circuit breaker with a 20 A current rating, Type Z tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£220.34
The ABB S303P-Z20NA, product code 2CDS383103R0488, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in industrial electrical installations. Part of the proven ABB System pro M compact S300P series, it combines high breaking capacity with precise fault detection and long-term reliability for demanding industrial applications.
Featuring a Type Z tripping characteristic, the S303P-Z20NA is specifically designed for protecting sensitive electronic equipment, PLCs, instrumentation, semiconductor devices and automation systems. Its highly sensitive magnetic trip mechanism delivers rapid fault disconnection, helping minimise damage to valuable electronic components while maintaining reliable circuit protection.
With a rated current of 20 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-Z20NA is ideal for industrial control panels, OEM machinery and three-phase distribution systems requiring simultaneous neutral switching. Its DIN rail mounting format enables quick installation while remaining fully compatible with ABB System pro M compact accessories.
Miniature circuit breakers automatically disconnect electrical circuits whenever overloads or short circuits occur. The ABB S303P-Z20NA combines thermal overload protection with a highly sensitive magnetic trip mechanism, helping safeguard wiring, automation systems and delicate electronic equipment from damaging fault currents.
Its Type Z tripping characteristic is specifically intended for electronic control systems, PLCs, instrumentation, semiconductor equipment and other precision devices where rapid fault clearance is essential to minimise equipment damage and reduce downtime.
| Current | 20 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-Z20NA |
| Product ID | 2CDS383103R0488 |
| Product type | Miniature circuit breaker |
| Rated current | 20 A |
| Tripping characteristic | Type Z |
| Pole configuration | 3P+N |
| Total poles | 4 |
| Protected poles | 3 |
| Rated operational voltage | 415 V AC |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Maximum AC voltage | 480Y/277 V AC |
| Maximum DC voltage | 125 V DC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA (IEC 60947-2), 25 kA (EN 60898-1) |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | DIN rail mounting |
| Terminal capacity | 0.75 to 35 mm² solid, 0.75 to 25 mm² stranded |
| Operating temperature | -40 to +70 °C |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| EAN | 4016779135610 |
| Country of origin | Germany |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S303P-Z20NA protects sensitive three-phase industrial circuits, electronic equipment and automation systems against overloads and short circuits.
The S303P-Z20NA has a rated current of 20 A.
Type Z circuit breakers provide a highly sensitive magnetic trip response, making them ideal for protecting electronic devices, PLCs, semiconductor equipment and instrumentation circuits.
The breaker provides a rated short-circuit breaking capacity of 25 kA in accordance with IEC 60947-2.
The breaker is designed for installation on a standard DIN rail inside electrical distribution boards, industrial control panels and machinery enclosures.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electrical engineers, panel builders and industrial automation specialists for dependable protection, precise tripping performance 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...