ABB - Electrification ST203M-D25NA - ST203M-D25NA Miniature Circuit Breaker ST203M-D25NA Miniature Circuit Breaker D-Char., 10kA, 25A, 3P+NA
ABB - Electrification

ST203M-D25NA

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Overview

The ABB ST203M-D25NA is a high-performance Miniature Circuit Breaker (MCB) designed for robust electrical protection in industrial and commercial applications. Engineered by ABB Electrification, this 3-pole + Neutral (3P+NA) unit offers a rated current of 25 Amperes and a significant breaking capacity of 10 kA, ensuring reliable safety against overcurrents and short circuits. Its D-characteristic tripping curve is specifically optimized for applications with high inrush currents, such as motors, transformers, and fluorescent lighting, providing sensitive protection without nuisance tripping. The ST203M-D25NA is built to meet stringent industry standards, offering dependable circuit isolation and fault interruption. Key features include: * **D-Characteristic Tripping:** Ideal for inductive loads with high starting currents. * **10kA Breaking Capacity:** Provides robust protection against severe short circuits. * **25A Rated Current:** Suitable for medium-load circuits. * **3-Pole + Neutral Configuration:** Offers comprehensive protection for three-phase systems with a neutral conductor. * **ABB Electrification Quality:** Manufactured by a trusted leader in electrical infrastructure.
  • ABB ST203M-D25NA Miniature Circuit Breaker
  • 3-Pole + Neutral (3P+NA) Configuration
  • 25 Ampere Rated Current
  • 10 kA Breaking Capacity
  • D-Characteristic Tripping Curve for inductive loads

Specifications

Amperage Rating
25 A
Current Rating
25 A
Interrupt Rating
(240 V AC) 10 kA / (480Y / 277 VAC) 10 kA / (125 V DC) 10 kA
Number of Poles
3
Poles
3P+NA
Series
ST203M
Special Features
ST203M-D25NA Miniature Circuit Breaker ST203M-D25NA Miniature Circuit Breaker D-Char., 10kA, 25A, 3P+NA
Trip Type
D
Tripping Characteristic
D
Voltage Rating
(240 V AC) / (125 V DC)
Package Dimensions (L x W x H)
2.72 IN x 2.76 IN x 3.46 IN
Package Dimensions (L x W x H)
6.9088 cm x 7.0104 cm x 8.7884 cm
Package Weight (Imperial)
1.550 L
Package Weight (Metric)
0.703 kg

Similar Products

ST203M-D20NA

Amperage Rating: 20 A

Current Rating: 20 A

ST203M-D25

Amperage Rating, Maximum: 25 A

Amperage Rating, Minimum: 25 A

Poles: 3P

ST203M-D15NA

Amperage Rating, Maximum: 15 A

Amperage Rating, Minimum: 15 A

Current Rating: 15 A

ST203M-D35NA

Amperage Rating, Maximum: 35 A

Amperage Rating, Minimum: 35 A

Interrupt Rating: (240 V AC) 10 kA / (480Y / 277 VAC) 5 kA / (125 V DC) 10 kA

ST203M-B25NA

Trip Type: B

Tripping Characteristic: B

Mounting Type: DIN Rail

ST203M-C25NA

Trip Type: C

Tripping Characteristic: C

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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.