WEG UMBW-1D2-50 - MINI CIRCUIT BREAKER UMBW-1D2-50
WEG

UMBW-1D2-50

Alternate Item Number: 14361179

UPC: 7909492436744

Contact for Pricing

Overview

The WEG UMBW-1D2-50 Mini Circuit Breaker (MCB) is a compact, high-performance electrical protection device engineered for industrial applications where space efficiency and reliability are critical. Designed by WEG, a global leader in motor and electrical solutions, this miniature circuit breaker delivers robust overcurrent protection for branch circuits, ensuring the safety of personnel, equipment, and infrastructure. The UMBW-1D2-50 combines advanced thermal and magnetic trip mechanisms to respond swiftly to overload and short-circuit conditions, preventing costly downtime, equipment damage, and potential electrical fires. Its modular design allows for easy integration into distribution panels, motor control centers, and industrial control systems, making it an essential component in modern electrical infrastructure. Industrial professionals rely on WEG’s UMBW-1D2-50 for applications across manufacturing, mining, oil and gas, renewable energy, and commercial facilities. Typical use cases include protecting motor circuits, lighting systems, control panels, and branch distribution networks. The circuit breaker’s compact form factor enables installation in tight spaces without compromising performance, while its compatibility with DIN rail mounting systems ensures seamless integration into existing electrical panels. Professionals appreciate the UMBW-1D2-50’s ability to handle frequent switching operations, a common requirement in dynamic industrial environments where machinery cycles on and off regularly. Selecting the right miniature circuit breaker involves evaluating trip characteristics, breaking capacity, and application-specific requirements. The WEG UMBW-1D2-50 is engineered to meet stringent international standards, including IEC 60898-1 and UL 1077, providing assurance of compliance and safety. Its thermal trip mechanism responds to prolonged overloads by gradually heating and tripping the breaker, while the magnetic trip offers instantaneous protection against short circuits, ensuring comprehensive fault coverage. The breaker’s 1-pole design makes it ideal for single-phase applications, such as control circuits, lighting, and auxiliary systems, where precise protection is essential. Installation and maintenance are straightforward with the UMBW-1D2-50. The breaker features a user-friendly toggle switch for manual operation, allowing operators to reset the device quickly after a fault condition is resolved. WEG’s commitment to quality and innovation is evident in the UMBW-1D2-50’s durable construction, which resists corrosion, vibration, and harsh environmental conditions. This reliability is particularly valuable in industries like mining and oil and gas, where equipment is exposed to extreme temperatures, dust, and moisture. Regular inspection and testing, as part of a broader electrical maintenance program, ensure the breaker continues to operate at peak performance. WEG’s reputation as a trusted manufacturer of industrial electrical solutions is built on decades of innovation, reliability, and customer support. The company’s global presence and extensive distribution network ensure that the UMBW-1D2-50 is readily available for projects of any scale, from small workshops to large-scale industrial facilities. By choosing the WEG UMBW-1D2-50 Mini Circuit Breaker, engineers and facility managers gain peace of mind knowing they are using a product that meets the highest standards of safety and performance. Whether protecting critical machinery, ensuring compliance with electrical codes, or enhancing system reliability, the UMBW-1D2-50 is a dependable solution for modern industrial electrical protection.
  • Compact 1-pole design for space-efficient installations
  • Dual thermal and magnetic trip mechanisms for overload and short-circuit protection
  • Compliant with IEC 60898-1 and UL 1077 standards
  • DIN rail mounting for easy integration into electrical panels
  • Durable construction for harsh industrial environments

Specifications

Current Rating
50 A
Mounting Type
DIN Rail
Poles
1P
Series
UMBW
Package Weight (Imperial)
0.7 LB
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 WEG

What certifications and standards do WEG products comply with?

WEG products meet extensive international standards across multiple critical categories, including safety, electromagnetic compatibility (EMC), functional safety, and regulatory compliance. Key certifications include UL, cUL, CE, TÜV Rheinland, and compliance with international standards such as EN 61800 series, IEC 61508, ISO 13849-1, and directives like Low Voltage (2014/35/EU), EMC (2014/30/EU), and RoHS. Their products are certified for safe operation in various industrial environments, with specific standards covering electrical safety, thermal performance, electromagnetic immunity, and environmental protection.

What is WEG's warranty policy?

WEG offers an 18-month standard warranty for automation products, covering defects in workmanship and materials. The warranty requires proper transportation, handling, storage, and installation within specified environmental conditions. Repairs must be performed by authorized WEG service, and the warranty is limited to the replacement or repair of the product itself, excluding consequential damages. Extended warranty options are available, including purchasing additional coverage at 2.5% of the product's selling price per year, up to 4 additional years.

What industries and applications are WEG products used for?

WEG products are extensively used across multiple industrial sectors, including packaging equipment, material handling, food processing, pumps, medical/lab equipment, door/gate openers, office machinery, and lawn/garden applications. Their versatile DC motors and variable frequency drives (VFDs) are designed for general industrial use, with solutions ranging from off-the-shelf products to custom OEM designs that meet UL/CSA standards for diverse manufacturing and processing environments.

What technical support does WEG offer?

WEG offers comprehensive technical support through multiple channels, including a dedicated Automation Service Department accessible via toll-free phone (1-877-934-3748) and email ([email protected]). They maintain a global network of accredited service centers worldwide, which customers can locate on their website. Additionally, WEG provides warranty support and technical assistance for their industrial automation products, with pre-approval required for warranty repairs.

What are the key features of WEG products?

WEG products feature advanced industrial automation technologies with key characteristics including high performance, flexibility, and connectivity. Their flagship CFW900 Variable Speed Drive demonstrates core product strengths: intelligent thermal management, built-in safety functions, IoT readiness, advanced energy saving capabilities, and comprehensive communication protocols. WEG drives offer robust performance with features like 150% overload capacity, modern graphic HMI, plug-and-play expansion modules, and compatibility across multiple industrial segments including food and beverage, pulp and paper, and manufacturing.

What communication protocols do WEG products support?

WEG products support multiple industrial communication protocols across their product lines, including EtherNet/IP, Modbus-TCP, Modbus-RTU, CANopen, and optional protocols like Profibus-DP and DeviceNet. Specifically, the PLC500 offers 2x Gigabit Ethernet Ports, 1x CAN Port, and 1x RS485 port, enabling seamless integration with major industrial communication networks.

What environmental ratings do WEG products have?

WEG products feature multiple environmental ratings and protection classes. They offer Protection Class 3C2 as a standard coating and Protection Class 3C3 as an optional extra coating, both compliant with IEC 60721-3-3. Environmental specifications include air relative humidity from 5% to 95% non-condensing, altitude ratings up to 1,000m standard (with current derating above that), and Pollution Degree 2 classification with non-conductive pollution requirements.

What accessories are available for WEG products?

WEG offers a comprehensive range of accessories across multiple product lines. For variable frequency drives like the CFW900, accessories include I/O expansion modules, communication modules, encoder modules, temperature transducer modules, relay output modules, and HMI accessories. These accessories expand communication capabilities, input/output functions, and application flexibility. Most accessories are interchangeable between drive frames and can be installed in backplane slots, with communication network accessories limited to one per variable speed drive.

What are the main product lines offered by WEG?

WEG offers a comprehensive range of industrial automation products, including variable frequency drives (CFW series like CFW100, CFW300, CFW500), soft starters (SSW series including SSW05, SSW07, SSW900), and the innovative Motion Fleet Management (MFM) system for predictive maintenance and asset monitoring. Their product lines are designed to support industrial automation needs across various sectors, providing solutions for motor control, fleet management, and operational efficiency.

How are WEG products typically installed?

WEG products are typically installed with careful attention to mounting specifications, protection ratings, and airflow requirements. For variable speed drives like the CFW900, installation methods include surface mounting, flange mounting, and side-by-side configurations with specific clearance guidelines. Installers must follow precise dimensional requirements for each product frame size, ensuring proper ventilation and electrical connections.