WEG UMBW-1D2-4 - MINI CIRCUIT BREAKER UMBW-1D2-4
WEG

UMBW-1D2-4

Alternate Item Number: 14361104

UPC: 7909492436706

Contact for Pricing

Overview

The WEG UMBW-1D2-4 Mini Circuit Breaker (MCB) is a compact, high-performance protection device engineered for industrial electrical systems requiring precise overcurrent safeguarding. Designed to meet the demands of modern industrial applications, this miniature circuit breaker integrates thermal and magnetic trip mechanisms to deliver comprehensive protection against overloads and short-circuit conditions. The UMBW-1D2-4 is part of WEG’s renowned line of electrical protection solutions, trusted by engineers and maintenance professionals worldwide for its reliability, durability, and compliance with international safety standards. **Core Protection Mechanisms** The UMBW-1D2-4 MCB combines two critical protection functions in a single, space-saving unit: - **Thermal Trip**: Responds to sustained overcurrent conditions by gradually heating a bimetallic strip, which triggers the breaker’s trip mechanism to disconnect the circuit before damage occurs. This is ideal for protecting motors, transformers, and other inductive loads from gradual overheating. - **Magnetic Trip**: Provides instantaneous response to severe short-circuit faults by using an electromagnetic coil that reacts to sudden current surges, ensuring rapid circuit interruption to prevent catastrophic equipment failure or fire hazards. **Key Applications and Industry Use Cases** The WEG UMBW-1D2-4 is purpose-built for a wide range of industrial environments where electrical safety and system integrity are paramount. Typical applications include: - **Motor Circuits**: Protects electric motors from overloads and phase imbalances, extending equipment lifespan and reducing downtime in manufacturing, HVAC, and pumping systems. - **Distribution Panels**: Installed in low-voltage switchgear to safeguard branch circuits, control panels, and feeder lines in industrial facilities, commercial buildings, and infrastructure projects. - **Industrial Power Systems**: Ensures reliable operation of machinery in harsh environments such as mining, oil and gas, and chemical processing, where electrical faults can lead to costly shutdowns or safety incidents. - **Renewable Energy Systems**: Suitable for solar and wind power installations, where compact MCBs protect inverters, battery banks, and distribution networks from overcurrent events. - **Building Automation**: Integrated into smart electrical systems to provide localized protection for lighting circuits, control panels, and automation equipment in commercial and industrial buildings. **Why Choose WEG for Industrial Protection?** WEG is a global leader in electrical engineering, with decades of expertise in designing and manufacturing high-quality protection devices. The UMBW-1D2-4 MCB reflects the company’s commitment to innovation, safety, and performance, offering several advantages: - **Proven Reliability**: WEG’s circuit breakers are tested to withstand extreme conditions, including high temperatures, vibrations, and electrical stress, ensuring consistent operation in critical applications. - **Compliance and Standards**: Manufactured to meet IEC 60898, UL 1077, and other international standards, the UMBW-1D2-4 provides peace of mind for engineers and compliance officers. - **Easy Installation and Maintenance**: The compact, modular design allows for quick mounting on DIN rails, simplifying installation in tight spaces. Additionally, WEG’s global service network ensures prompt support for maintenance and troubleshooting. - **Cost-Effective Protection**: By preventing equipment damage and downtime, the UMBW-1D2-4 reduces long-term operational costs, making it a smart investment for any industrial electrical system. **Selection and Installation Considerations** When specifying the WEG UMBW-1D2-4 for an application, professionals should evaluate: - **Current Rating**: Select a breaker with a current rating that matches the load requirements of the protected circuit, accounting for startup inrush currents in motor applications. - **Trip Characteristics**: Choose between Type B, C, or D trip curves based on the load type—Type C is ideal for general industrial circuits, while Type D suits high-inrush loads like motors. - **Breaking Capacity**: Ensure the MCB’s breaking capacity (Icn) exceeds the prospective short-circuit current at the installation point to guarantee reliable fault interruption. - **Environmental Conditions**: Consider factors such as ambient temperature, humidity, and exposure to dust or corrosive substances, which may require additional enclosures or protective measures. **Industry Trust and Global Reach** WEG’s reputation in the industrial electrical sector is built on delivering solutions that combine cutting-edge technology with practical, field-tested reliability. The UMBW-1D2-4 Mini Circuit Breaker is no exception, offering a balance of performance, safety, and value that aligns with the needs of engineers, contractors, and facility managers. Whether deployed in a sprawling manufacturing plant, a remote mining operation, or a modern smart building, this MCB delivers the protection and peace of mind required for uninterrupted operations. For professionals seeking a dependable, high-quality miniature circuit breaker, the WEG UMBW-1D2-4 stands as a benchmark in industrial electrical protection. Its robust design, adherence to global standards, and WEG’s legacy of engineering excellence make it an ideal choice for safeguarding critical electrical systems across diverse industries.
  • Dual thermal and magnetic trip mechanisms for overload and short-circuit protection
  • Compact design ideal for motor circuits, distribution panels, and industrial power systems
  • Compliant with IEC 60898, UL 1077, and other international safety standards
  • Easy DIN rail mounting for quick installation and maintenance
  • Trusted WEG quality for harsh industrial environments

Specifications

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.