ABB - Electrification ST201M-B50NA - ST201M-B50NA Miniature Circuit Breaker ST201M-B50NA Miniature Circuit Breaker B-Char., 5kA, 50A, 1P+NA
ABB - Electrification

ST201M-B50NA

Contact for Pricing

Overview

The ABB ST201M-B50NA Miniature Circuit Breaker (MCB) is a single-pole + neutral (1P+NA) protection device from ABB Electrification, SKU: ST201M-B50NA. This MCB features a B-characteristic tripping curve, a rated current of 50A, and a breaking capacity of 5kA. The 1+NA pole configuration ensures simultaneous disconnection of both phase and neutral conductors, enhancing safety by preventing floating neutral conditions and adhering to IEC 60898 standards. This design simplifies wiring and installation for single-phase systems. Part of ABB’s ST201M series, this breaker is designed for modular DIN-rail mounting and offers a compact 18mm width per pole. It complies with IEC 60898-1 and EN 60898-1 standards. The B-characteristic tripping curve provides a fast response to overloads, typically tripping between 3-5 times the rated current. This makes it suitable for circuits with low inrush currents, such as lighting, small motors, and general-purpose wiring, minimizing nuisance tripping. With a 5kA breaking capacity, the ST201M-B50NA is reliable for systems with moderate fault current levels. Applications include protection for lighting circuits, control panels, distribution boards, and branch circuits in residential sub-distribution panels, small commercial buildings, and light industrial settings where space efficiency and electrical safety compliance are paramount. Its compact design facilitates high-density panel configurations. For electrical engineers and electricians, the ST201M-B50NA offers predictable performance and ABB’s established reliability. It is compatible with ABB’s range of accessories, including auxiliary contacts and trip indicators, for expanded functionality in modern electrical installations. Manufactured in Switzerland (CH).
  • ABB ST201M-B50NA Miniature Circuit Breaker
  • Rated Current: 50A
  • Breaking Capacity: 5kA
  • Tripping Characteristic: B-Char
  • Number of Poles: 1+NA (1 Pole + Neutral)

Specifications

Amperage Rating
50 A
Amperage Rating, Maximum
50 A
Amperage Rating, Minimum
50 A
Current Rating
50 A
Interrupt Rating
(240 V AC) 10 kA / (277 V AC) 5 kA / (60 V DC) 10 kA
Mounting Type
DIN-Rail
Number of Poles
1
Poles
1P+NA
Series
ST201M
Size
18 mm per pole
Special Features
ST201M-B50NA Miniature Circuit Breaker ST201M-B50NA Miniature Circuit Breaker B-Char., 5kA, 50A, 1P+NA
Trip Type
B
Tripping Characteristic
B
Voltage Rating
(240 V AC) / (277 V AC) / (60 V DC)
Package Dimensions (L x W x H)
2.72 IN x 1.38 IN x 3.46 IN
Package Dimensions (L x W x H)
6.9088 cm x 3.5052 cm x 8.7884 cm
Package Weight (Imperial)
3.080 L
Package Weight (Metric)
1.397 kg
Ground Lug

DNGL

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

83411621001

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

76512124011

ZCT,LZR-030(V),EMPR,EXP
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
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.

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.