ABB S303P-Z3 three-pole miniature circuit breaker with a 3 A rated current, Z curve tripping characteristic and 25 kA breaking capacity for sensitive industrial and electronic circuit protection.
£219.61
The ABB S303P-Z3 is a high-performance three-pole miniature circuit breaker (MCB) engineered to protect sensitive electrical circuits against overloads and short circuits. As part of the trusted ABB System pro M compact S300P series, it delivers precise circuit protection, high fault interruption capability and dependable long-term reliability for industrial, commercial and OEM installations.
Manufactured in accordance with international IEC, UL and CSA standards, the S303P-Z3 features a compact DIN rail mounted design that enables fast installation inside switchboards, control panels and distribution boards. Its robust construction, secure screw terminals and front trip indication simplify installation and maintenance while ensuring safe operation.
Featuring a 3 A rated current, a Z curve tripping characteristic and a 25 kA breaking capacity, this miniature circuit breaker is particularly suited to protecting electronic equipment, semiconductor devices, PLCs, instrumentation and other sensitive circuits that require rapid disconnection at relatively low overcurrent levels.
The ABB S303P-Z3 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping to protect wiring, control equipment and sensitive electronic devices from damage. Its Z curve characteristic provides magnetic tripping at lower overcurrent levels than B, C, D or K curve circuit breakers, making it particularly suitable for delicate electronic applications.
The ABB S300P range is trusted worldwide by panel builders, automation specialists and industrial electrical contractors for its dependable performance, high fault interruption capability and compliance with international standards.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-Z3 |
| SKU | 2CDS383001R0318 |
| EAN | 4016779077897 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 3 A |
| Tripping characteristic | Z Curve |
| Number of poles | 3 |
| Rated operational voltage | 415 V AC |
| Maximum operating voltage | 480Y/277 V AC, 125 V DC |
| Frequency | 50 / 60 Hz |
| Breaking capacity (Icn) | 25 kA |
| Ultimate breaking capacity (Icu) | 100 kA at 400/415 V AC |
| Rated insulation voltage | 500 V |
| Impulse withstand voltage | 6 kV |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 372 g |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects sensitive three-phase electrical circuits against overloads and short circuits in electronic equipment, instrumentation and industrial control applications.
The ABB S303P-Z3 has a 3 A rated current.
A Z curve circuit breaker trips at relatively low overcurrent levels, making it ideal for sensitive electronic devices, semiconductor equipment and precision control circuits.
The S303P-Z3 provides a 25 kA rated short-circuit breaking capacity (Icn) and an ultimate breaking capacity of up to 100 kA (Icu) at 400/415 V AC.
The breaker is designed for installation on a standard 35 mm DIN rail inside electrical distribution boards, switchboards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electricians, automation engineers and panel builders for delivering precise circuit protection, outstanding fault performance and long operational life.
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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...