ABB - Electrification Signature Partner Distributor
ABB - Electrification ST203M-D40NA - ST203M-D40NA Miniature Circuit Breaker ST203M-D40NA Miniature Circuit Breaker D-Char., 5kA, 40A, 3P+NA
ABB - Electrification

ST203M-D40NA

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Overview

The ABB ST203M-D40NA Miniature Circuit Breaker (MCB) offers reliable overcurrent and short-circuit protection for industrial and commercial electrical distribution systems. This 3-pole unit with a neutral connection (3P+NA) is specifically designed for circuits experiencing high inrush currents, such as those powering motors, transformers, and lighting systems. Its D-characteristic tripping curve is engineered to tolerate temporary surges during equipment startup while ensuring rapid response to fault conditions. With a rated current of 40A and a breaking capacity of 5kA at its rated voltage, the ST203M-D40NA meets essential safety and operational requirements. The MCB is built on the E1.2N-A/MS frame size, facilitating its integration into standard electrical panels and distribution boards via DIN rail mounting. The manufacturer, ABB Electrification, specifies a withstand rating of 50kA for this series, indicating its capability to handle significant fault currents. The SKU for this specific unit is ST203M-D40NA. This MCB is suitable for applications requiring protection against overload and short circuits without nuisance tripping caused by normal operational surges. Its construction and specifications align with industry standards for electrical safety and performance. The ST203M-D40NA is a practical choice for protecting branch circuits, control panels, and distribution equipment where the characteristics of the load demand a D-curve protection device. Originating from Switzerland (CH), this component is part of ABB's extensive range of electrical protection devices.
  • 3-Pole + Neutral (3P+NA) Miniature Circuit Breaker
  • Rated Current: 40A
  • Breaking Capacity: 5kA
  • Tripping Characteristic: D-curve for high inrush currents
  • Frame Size: E1.2N-A/MS

Specifications

Amperage Rating
40 A
Amperage Rating, Maximum
40 A
Amperage Rating, Minimum
40 A
Breaking Capacity
5 kA
Current Rating
40 A
Interrupt Rating
(240 V AC) 10 kA / (480Y / 277 VAC) 5 kA / (125 V DC) 10 kA
Number of Poles
3
Poles
3P+NA
Series
ST203M
Special Features
ST203M-D40NA Miniature Circuit Breaker ST203M-D40NA Miniature Circuit Breaker D-Char., 5kA, 40A, 3P+NA
Trip Type
D
Tripping Characteristic
D
Tripping Characteristic
D-Curve
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 breaking capacity of this circuit breaker?

The ST203M-D40NA has a breaking capacity of 5kA, ensuring reliable interruption of fault currents in industrial and commercial systems.

What is the rated current of the ST203M-D40NA?

The rated current of the ST203M-D40NA is 40A, suitable for continuous operation in protected circuits.

How many poles does the ST203M-D40NA have?

The ST203M-D40NA is a 3P+NA circuit breaker, meaning it has three poles plus a neutral connection.

Is the ST203M-D40NA compatible with DIN rail mounting?

Yes, the ST203M-D40NA is designed for DIN rail mounting, making it easy to install in standard electrical panels.

What is the tripping characteristic of the ST203M-D40NA?

The ST203M-D40NA features a D-characteristic tripping curve, designed to handle high inrush currents typical in motor and transformer applications while providing rapid short-circuit protection.

What is the withstand rating of the ST203M-D40NA?

The ST203M-D40NA has a withstand rating of 50kA, indicating its ability to endure high fault currents without damage.

What is the frame size of the ST203M-D40NA?

The ST203M-D40NA uses the E1.2N-A/MS frame size, designed for compact DIN rail mounting in electrical panels.

What applications is the ST203M-D40NA suitable for?

This MCB is ideal for protecting circuits with high inrush currents, such as motors, transformers, and lighting systems in industrial and commercial settings.

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.