ABB - Electrification ST203M-B2 - ST203M-B2 Miniature Circuit Breaker ST203M-B2 Miniature Circuit Breaker B-Char., 10kA, 2A, 3P
ABB - Electrification

ST203M-B2

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Overview

The ABB ST203M-B2 Miniature Circuit Breaker (MCB) is engineered for robust and reliable electrical protection in demanding industrial and commercial environments. This 3-pole device, with a 2A current rating, offers precise overcurrent and short-circuit protection for low-voltage distribution systems. Its B-characteristic tripping curve ensures rapid response to overloads and short circuits, making it ideal for safeguarding sensitive electronic equipment and preventing damage to electrical installations. With a significant 10kA short-circuit breaking capacity, the ST203M-B2 is built to withstand fault conditions, ensuring operational continuity and safety. Designed for panel builders, OEMs, and electrical contractors, this compact MCB facilitates efficient installation in space-constrained electrical panels. It adheres to stringent international safety standards, providing peace of mind and dependable performance. Key specifications include: * **Current Rating:** 2A * **Poles:** 3-pole * **Short-Circuit Breaking Capacity:** 10kA * **Tripping Characteristic:** B-Curve This ABB circuit breaker is a vital component for ensuring the integrity and safety of electrical circuits across a wide spectrum of applications, from building automation to machinery control.
  • ABB ST203M-B2 Miniature Circuit Breaker
  • 2 Ampere (2A) Current Rating
  • 3-Pole (3P) Configuration
  • 10kA Short-Circuit Breaking Capacity
  • B-Characteristic Tripping Curve

Specifications

Amperage Rating, Maximum
2 A
Amperage Rating, Minimum
2 A
Interrupt Rating
(240 V AC) 10 kA / (480Y / 277 VAC) 10 kA / (125 V DC) 10 kA
Number of Poles
3
Special Features
ST203M-B2 Miniature Circuit Breaker ST203M-B2 Miniature Circuit Breaker B-Char., 10kA, 2A, 3P
Tripping Characteristic
B
Voltage Rating
(240 V AC) / (125 V DC)
Package Dimensions (L x W x H)
2.72 IN x 2.07 IN x 3.46 IN
Package Dimensions (L x W x H)
6.9088 cm x 5.2578 cm x 8.7884 cm
Package Weight (Imperial)
1.300 L
Package Weight (Metric)
0.590 kg

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Frequently Asked Questions about ABB - Electrification

What certifications and standards do ABB - Electrification products comply with?

ABB - Electrification products comply with a comprehensive range of international certifications and standards, including UL (United States), CSA (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products meet critical international standards such as IEC 60947 series for low-voltage switchgear, functional safety standards EN 61800-5-2 and ISO 13849-1, and marine classification standards from Bureau Veritas, DNV, and Lloyd's Register of Shipping.

What industries and applications are ABB - Electrification products used for?

ABB - Electrification products are engineered for critical applications across multiple industries, including Energy, Oil & Gas, Manufacturing, Power Generation, HVAC, Marine, Food & Beverage, Mining, Pulp & Paper, Water Treatment, and Automotive. Their solutions cover essential electrical infrastructure needs such as switchgear, power distribution systems, circuit protection, digital control technologies, and drive systems designed for high-reliability environments with a strong focus on sustainability, efficiency, and safety.

What technical support does ABB - Electrification offer?

ABB - Electrification offers comprehensive technical support through multiple channels, including a dedicated technical support hotline at 888-385-1221 (Option 1), available 7:00 a.m. - 5:00 p.m. CST, Monday-Friday. Their support services encompass 24/7/365 emergency services, on-site support, remote monitoring and diagnostics, installation and commissioning, equipment assessments, repair coordination, and multi-vendor technical assistance. Customers can also access resources like personnel safety training, disaster recovery support, and service agreements tailored to their specific electrification needs.

What are the main product lines offered by ABB - Electrification?

ABB - Electrification offers a comprehensive range of electrical distribution and protection products, including circuit monitoring systems, panelboards, switchgear, motor control centers, circuit breakers, softstarters, and power distribution solutions. Key product lines span low and medium voltage applications across utilities, commercial, industrial, healthcare, and manufacturing sectors, with specialized offerings like the ReliaGear® panelboards, SMISSLINE TP bus systems, and Ekip UP protection and metering relays.

What are the key features of ABB - Electrification products?

ABB - Electrification products feature advanced integrated design elements that enhance industrial performance and reliability. Key features include harmonics and EMC design, integrated DC choke, removable terminals for fast installation, USB ports for troubleshooting, and integrated Safe Torque Off (STO) functionality. The products deliver superior motor control capabilities, support both induction and permanent magnet motors, and offer robust operational features like side-by-side mounting without derating and operation at temperatures up to 45°C. Additionally, ABB's Electrification solutions emphasize digital innovation, with technologies like Novolink enabling predictive maintenance, enhanced analytics, and seamless system integration.

What communication protocols do ABB - Electrification products support?

ABB - Electrification products support a comprehensive range of industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, DeviceNet, and IEC 61850. These protocols enable flexible connectivity across multiple industrial automation platforms, with support for various network topologies and high-speed data transmission up to 100 Mbps.

What environmental ratings do ABB - Electrification products have?

ABB - Electrification products feature robust environmental ratings across multiple standards, including IP54 to IP66 protection levels and NEMA Type 1 to Type 4X enclosures. These ratings ensure equipment can withstand challenging industrial environments, providing dust-tight, water-resistant, and corrosion-resistant protection for indoor and outdoor applications.

What accessories are available for ABB - Electrification products?

ABB - Electrification offers a comprehensive range of accessories across multiple product lines, including auxiliary contact blocks, signaling contacts, shunt trips, undervoltage releases, electronic timers, interlocks, interface relays, mounting pieces, terminal blocks, and connection accessories. These accessories are designed to enhance functionality, improve connectivity, and provide additional protection for industrial control systems, with many accessories being compatible with SMISSLINE TP plug-in distribution systems and Unifix AD busbar systems.

How are ABB - Electrification products typically installed?

ABB - Electrification products are installed through a professional, systematic process that includes precise equipment verification, secure electrical connections, and comprehensive testing. Installation typically involves verifying foundation requirements, assembling equipment, connecting busbars and control cables, establishing earthing systems, and conducting thorough pre-commissioning and commissioning tests to ensure optimal performance, reliability, and safety.

What is ABB - Electrification's warranty policy?

ABB - Electrification offers a standard 1-year factory warranty for most electrification products, with options to extend warranty coverage up to 5 years for specific product lines like low voltage circuit breakers. Extended warranty requires online registration through ABB's Extended Warranty Tool, which verifies the product application and provides additional coverage for manufacturing defects and factory-mounted accessories.