ABB S303P-Z4NA miniature circuit breaker with a 4 A current rating, Type Z tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial circuit protection.
£249.05
The ABB S303P-Z4NA, product code 2CDS383103R0338, is a premium miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial electrical installations. As part of the trusted ABB System pro M compact S300P series, it offers exceptional breaking capacity, dependable performance and long service life for demanding industrial applications.
Featuring a Type Z tripping characteristic, the S303P-Z4NA is specifically designed for the protection of highly sensitive electronic equipment and semiconductor devices. Its fast magnetic tripping response provides excellent protection for circuits with low fault current tolerances, making it ideal for industrial automation, control systems and electronic equipment.
With a rated current of 4 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-Z4NA is well suited to three-phase industrial distribution systems requiring simultaneous neutral switching. Its compact DIN rail mounting design enables quick installation inside electrical distribution boards and control panels.
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur. The ABB S303P-Z4NA combines thermal overload protection with a highly sensitive magnetic trip mechanism to safeguard electronic equipment, control systems and electrical installations from damaging fault conditions.
Its Type Z tripping characteristic is intended for applications where rapid fault clearance is essential to protect sensitive electronic components. Combined with its high breaking capacity and industrial construction, the S303P-Z4NA is well suited to demanding automation and control applications.
| Current | 4 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-Z4NA |
| Product ID | 2CDS383103R0338 |
| Product type | Miniature circuit breaker |
| Rated current | 4 A |
| Tripping characteristic | Type Z |
| Pole configuration | 3P+N |
| Total poles | 4 |
| Protected poles | 3 |
| Rated operational voltage | 415 V AC |
| Maximum DC voltage | 125 V DC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | DIN rail mounting |
| Terminal type | Screw terminals |
| Conductor capacity | 0.75 to 35 mm² |
| Mechanical endurance | 20,000 operating cycles |
| Electrical endurance | 10,000 operating cycles |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S303P-Z4NA protects sensitive industrial electrical circuits, electronic equipment and control systems against overloads and short circuits.
The S303P-Z4NA has a rated current of 4 A.
Type Z circuit breakers provide a highly sensitive magnetic trip, making them ideal for protecting electronic equipment and semiconductor devices with low fault current tolerances.
The breaker provides a rated short-circuit breaking capacity of 25 kA.
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 and panel builders for dependable protection, high performance and reliable operation in industrial electrical systems.
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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...