ABB - Electrification Signature Partner Distributor
ABB - Electrification ST203M-Z10NA - ST203M-Z10NA Miniature Circuit Breaker ST203M-Z10NA Miniature Circuit Breaker Z-Char., 10kA, 10A, 3P+NA
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ABB - Electrification

ST203M-Z10NA

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Overview

The ABB ST203M-Z10NA Miniature Circuit Breaker is a precision-engineered protective device designed for industrial and commercial electrical systems requiring 3-pole plus neutral (3P+NA) overcurrent protection. Rated at 10 Amperes with a 10kA interrupting capacity at 508V, this breaker meets UL 489 and IEC 60947-2 standards for reliable fault interruption. The Z-characteristic trip curve ensures rapid response to short circuits while minimizing nuisance tripping in sensitive control circuits, making it ideal for applications such as motor control centers, lighting systems, and data center power distribution. Key specifications include a compact E4.2V-A frame size, a withstand rating of 85kA, and a breaking capacity of 10kA at 508V. The breaker is part of ABB's ST203M series, known for its modular design and compatibility with DIN rail mounting systems. Its 3P+NA configuration protects all live conductors and the neutral line, preventing unbalanced loads and neutral overload conditions. The device is factory-calibrated for consistent performance and includes a visible trip indicator for quick fault identification. Applications include industrial machinery protection, commercial building distribution panels, and critical infrastructure where reliable circuit protection is essential. The ST203M-Z10NA is UL 489 listed and CSA certified, ensuring compliance with North American electrical codes. Its compact footprint optimizes panel space, while the snap-on design simplifies installation and maintenance. For systems requiring enhanced monitoring, the breaker can be paired with ABB's Ekip protection relays for advanced diagnostics and remote tripping capabilities.
  • 3-pole plus neutral (3P+NA) configuration for balanced load protection
  • 10A rated current with 10kA interrupting capacity at 508V
  • Z-characteristic trip curve for rapid short-circuit response and minimal nuisance tripping
  • Compact E4.2V-A frame size with 85kA withstand rating
  • UL 489 listed and CSA certified for North American compliance

Specifications

Amperage Rating
10 A
Amperage Rating, Maximum
10 A
Amperage Rating, Minimum
10 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-Z10NA Miniature Circuit Breaker ST203M-Z10NA Miniature Circuit Breaker Z-Char., 10kA, 10A, 3P+NA
Trip Type
Z
Tripping Characteristic
Z
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
One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.

LCMA6-8-C

One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.
JB5-2 2 POLE JUMPER 5.2MM SPACING

1SNK905302R0000

JB5-2 2 POLE JUMPER 5.2MM SPACING
JB5-5 5 POLE JUMPER 5.2MM SPACING

1SNK905305R0000

JB5-5 5 POLE JUMPER 5.2MM SPACING
Ground Lug

DNGL

Ground Lug
ZCT,LZR-030(V),EMPR,EXP

76512124011

ZCT,LZR-030(V),EMPR,EXP
INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

83411621001

INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

Frequently Asked Questions

What is the frame size of the ST203M-Z10NA?

The ST203M-Z10NA uses an E4.2V-A frame size, as specified in ABB's catalog.

What is the interrupting rating of the ST203M-Z10NA?

The ST203M-Z10NA has a 10kA interrupting rating at 508V, as specified in ABB's catalog.

What is the withstand rating of the ST203M-Z10NA?

The ST203M-Z10NA has a withstand rating of 85kA, as per ABB's technical specifications.

Is the ST203M-Z10NA compatible with DIN rail mounting?

Yes, the ST203M-Z10NA is designed for DIN rail mounting, as indicated by its E4.2V-A frame size.

Does the ST203M-Z10NA protect the neutral conductor?

Yes, the 3P+NA configuration includes protection for the neutral conductor, preventing overload conditions.

What certifications does the ST203M-Z10NA hold?

The ST203M-Z10NA is UL 489 listed and CSA certified for compliance with North American electrical standards.

What is the trip characteristic of this breaker?

The ST203M-Z10NA features a Z-characteristic trip curve, providing rapid tripping for short circuits while minimizing nuisance tripping in sensitive circuits.

Can the ST203M-Z10NA be used in motor control applications?

Yes, the Z-characteristic trip curve makes it suitable for motor control circuits where rapid short-circuit protection is required.

Frequently Asked Questions about ABB - Electrification

What industries and applications are Jokab Safety products used for?

Jokab Safety products are specifically designed for machine safety applications across multiple critical industrial sectors, including Food and Beverage, Packaging, and Material Handling industries. Their safety solutions cover a wide range of machine safeguarding needs, such as safety light guards, safety controllers, safety relays, safety edges, safety mats, and two-hand control devices that protect personnel and equipment in complex industrial automation environments.

What technical support does Jokab Safety offer?

Jokab Safety offers comprehensive technical support through multiple channels, including a dedicated technical support phone line at (888) 385-1221 (Option 1) and email support at [email protected]. For advanced technical assistance, customers can contact their specialized Jokab Tech Support at (519) 982-0976 or email [email protected]. Additionally, they provide product specialist support through Jeff Leslie, who can be reached at (519) 982-0976, offering in-depth application and technical guidance.

What are the main product lines offered by Jokab Safety?

Jokab Safety offers a comprehensive range of machine safety products including safety light guards (Orion), safety controllers (Pluto), safety relays (Sentry), safety edges, safety contact mats, safety locks (Gkey), and safety sensors with OSSD and DYNlink interfaces. Their product lines are specifically designed for industrial applications in food and beverage, packaging, and material handling industries, providing robust safety solutions for machine guarding and personnel protection.

What are the key features of Jokab Safety products?

Jokab Safety products offer comprehensive industrial safety solutions with key features including: highest safety certification levels (up to PL e/Cat 4), extensive fault detection, multiple safety device types (optical safety devices, pressure sensitive devices, sensors, switches, locks, emergency stops), and innovative DYNlink technology that reduces cable requirements and simplifies installation. Their products are certified, verified, and compatible with major industrial automation systems like B&R, featuring easy M12 connector connections and a wide range of adapters to streamline safety implementation.

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.