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ABB S203-C50 Miniature Circuit Breaker on a white background, highlighting its compact design.

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ABB S203-C50

by ABB

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OverviewThe ABB S203-C50 Miniature Circuit Breaker (MCB) offers dependable protection against electrical overcurrents and short circuits across many demanding applications. This MCB, crafted by the well-known electrical solutions leader ABB, is essential for securing electrical setups in home, business, and industrial environments. With a 50A current rating, the S203-C50 maintains optimal circuit integrity, actively preventing electrical faults that could damage equipment, cause power outages, or create safety risks. Its sleek, space-saving design and convenient DIN rail attachment make it a highly adaptable solution for integration into control panels and distribution boards, ensuring steady protection for light and heavy electrical demands. This premium circuit breaker reflects ABB's dedication to advanced electrical safety and performance.Key Features Model: ABB S203-C50 Function: Specialized Miniature Circuit Breaker (MCB) for complete overload and short circuit protection. Rated Current: 50A, offering significant current handling capacity for various electrical loads. Tripping Type: C curve, specifically designed to manage moderate inrush currents and improve system stability. Breaking Capacity: An impressive 6kA at 230V AC, ensuring rapid and effective circuit interruption during fault conditions. Compact Design: Optimized for space-efficient integration into modern control panels and distribution boards. DIN Rail Mounting: Allows for simple and secure installation, reducing setup time. Reliable Protection: Guarantees swift tripping action to quickly isolate faulty circuits, safeguarding electrical infrastructure and personnel. Technical Specifications Rated Voltage: 230/400V AC, compatible with a wide range of electrical systems. Breaking Capacity: 6kA at 230V AC, demonstrating superior fault current interruption capability. Tripping Curve: C, precisely calibrated for applications with moderate inrush currents. Mounting Type: Standard DIN rail, ensuring universal compatibility and ease of installation. Operating Temperature: A broad range from -25°C to 60°C, ensuring reliable performance in various environmental conditions. Protection Class: IP20, providing protection against solid objects larger than 12.5mm, ideal for indoor uses. Weight: A light 0.2 kg, contributing to easy handling and installation without adding significant load to electrical panels. Applications Residential Circuits: Essential for protecting household wiring, appliances, and electronic devices, ensuring ongoing safety and operation. Commercial Buildings: An indispensable component for protecting electrical circuits within offices, retail stores, and various commercial facilities, maintaining continuous operation. Industrial Installations: Crucial for shielding sensitive machinery, industrial control panels, and automation systems from damaging electrical surges and faults. Distribution Boards: Serves as a vital protective element within power distribution systems, ensuring balanced and secure power delivery across diverse electrical networks. Why ChooseThe ABB S203-C50 stands out as a top option for professionals requiring uncompromised electrical protection. Its robust 50A rated current, combined with a 6kA breaking capacity, positions it as a highly capable device for numerous applications. The C-type tripping curve is specifically engineered to handle moderate inrush currents, a common characteristic in many modern electrical loads, thereby reducing unwanted tripping and enhancing system reliability. Its compact form factor is a significant advantage, allowing for efficient use of space within increasingly crowded control panels and distribution boards. Additionally, the fast and secure DIN rail mounting feature simplifies installation, helping to reduce labor expenses.Order NowSecure your electrical systems today with the ABB S203-C50 Miniature Circuit Breaker. Contact us to place your order or learn more about our comprehensive range of electrical protection solutions.FAQWhat is the primary function of the ABB S203-C50 MCB?The main function of the ABB S203-C50 MCB is to provide robust protection against electrical overloads and short circuits, safeguarding electrical systems and connected equipment.What does the 'C' tripping curve signify for this circuit breaker?The 'C' tripping curve indicates that the ABB S203-C50 is designed to handle moderate inrush currents, making it suitable for a wide array of general-purpose applications.Is the ABB S203-C50 MCB suitable for industrial environments?Yes, its durable design and 6kA breaking capacity make the ABB S203-C50 MCB an excellent choice for protecting machinery and control panels in industrial settings.

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PRODUCT DETAILS

ABB S203-C50

Overview

This is a genuine ABB component from the Low Voltage Products family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine ABB catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader ABB automation ecosystem
  • Engineered to integrate inside Low Voltage Products installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your ABB equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same ABB catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation ABB platform with documented conversion notes for the Low Voltage Products family

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Rated Voltage: 230/400V AC, compatible with a wide range of electrical systems.
  • Breaking Capacity: 6kA at 230V AC, demonstrating superior fault current interruption capability.
  • Tripping Curve: C, precisely calibrated for applications with moderate inrush currents.
  • Mounting Type: Standard DIN rail, ensuring universal compatibility and ease of installation.
  • Operating Temperature: A broad range from -25°C to 60°C, ensuring reliable performance in various environmental conditions.
  • Protection Class: IP20, providing protection against solid objects larger than 12.5mm, ideal for indoor uses.
  • Weight: A light 0.2 kg, contributing to easy handling and installation without adding significant load to electrical panels.

Applications

  • Residential Circuits: Essential for protecting household wiring, appliances, and electronic devices, ensuring ongoing safety and operation.
  • Commercial Buildings: An indispensable component for protecting electrical circuits within offices, retail stores, and various commercial facilities, maintaining continuous operation.
  • Industrial Installations: Crucial for shielding sensitive machinery, industrial control panels, and automation systems from damaging electrical surges and faults.
  • Distribution Boards: Serves as a vital protective element within power distribution systems, ensuring balanced and secure power delivery across diverse electrical networks.

Why Choose the S203-C50?

The ABB S203-C50 stands out as a top option for professionals requiring uncompromised electrical protection. Its robust 50A rated current, combined with a 6kA breaking capacity, positions it as a highly capable device for numerous applications. The C-type tripping curve is specifically engineered to handle moderate inrush currents, a common characteristic in many modern electrical loads, thereby reducing unwanted tripping and enhancing system reliability. Its compact form factor is a significant advantage, allowing for efficient use of space within increasingly crowded control panels and distribution boards. Additionally, the fast and secure DIN rail mounting feature simplifies installation, helping to reduce labor expenses.

Availability & Shipping

  • In stock: S203-C50 ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every S203-C50 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — ABB

The main function of the ABB S203-C50 MCB is to provide robust protection against electrical overloads and short circuits, safeguarding electrical systems and connected equipment.

Machine down? We ship parts the same day.

New, surplus, and refurbished ABB inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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Independent Supplier Notice

PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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PALM Parts Solution sells used surplus products. PALM Parts Solution is not an authorized distributor, affiliate, or representative for the brands we carry. Products sold by PALM Parts Solution come with PALM Parts Solution's 1-Year Warranty and do not come with the original manufacturer's warranty. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. This website is not sanctioned or approved by any manufacturer or tradename listed.

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