WEG UMBW-4D3-10 - MINI CIRCUIT BREAKER UMBW-4D3-10
WEG

UMBW-4D3-10

Alternate Item Number: 13642279

UPC: 7909492434719

Contact for Pricing

Overview

The **WEG UMBW-4D3-10 Mini Circuit Breaker** is a high-performance miniature circuit breaker (MCB) engineered for industrial-grade electrical protection and control. Designed to safeguard critical infrastructure, this compact yet robust device delivers precise overcurrent protection for branch circuits, preventing costly equipment damage, electrical fires, and system downtime. As a trusted component in WEG’s comprehensive electrical protection portfolio, the UMBW-4D3-10 exemplifies the brand’s commitment to innovation, durability, and safety in industrial applications. **Core Functionality and Protection Mechanisms** The UMBW-4D3-10 integrates both **thermal and magnetic trip mechanisms**, offering dual-layer protection against overload and short-circuit conditions. The thermal element responds to sustained overcurrent by gradually heating and tripping the breaker, while the magnetic element provides instantaneous interruption during fault conditions, such as sudden short circuits. This combination ensures rapid response to faults while minimizing nuisance tripping, making it ideal for sensitive industrial environments where reliability is paramount. **Key Features and Technical Advantages** - **Compact Design**: The miniature form factor allows for space-efficient installation in crowded control panels, distribution boards, and motor control centers (MCCs), optimizing panel layout without compromising protection. - **High Breaking Capacity**: Engineered to interrupt fault currents effectively, the UMBW-4D3-10 meets stringent industrial standards, ensuring safe operation even in high-fault scenarios. - **Modular and Interchangeable**: Compatible with industry-standard DIN rail mounting systems, this MCB can be easily integrated into existing systems or scaled for new installations, reducing downtime during maintenance or upgrades. - **Wide Application Range**: Suitable for protecting motors, transformers, lighting circuits, and branch distribution systems, the UMBW-4D3-10 is a versatile solution for diverse industrial sectors. - **Compliance and Safety**: Built to meet international standards such as IEC 60898-1 and UL 1077, the breaker ensures compliance with global safety regulations, reducing liability risks for facility managers and engineers. **Typical Applications and Industry Use Cases** The UMBW-4D3-10 is a go-to solution for professionals in industries where electrical safety and system reliability are critical. Common applications include: - **Motor Protection**: Safeguarding industrial motors from overloads and short circuits in manufacturing plants, HVAC systems, and conveyor systems. - **Distribution Panels**: Protecting branch circuits in commercial buildings, data centers, and utility substations. - **Control Systems**: Integrating into programmable logic controllers (PLCs) and motor starters to provide localized protection. - **Renewable Energy**: Used in solar and wind power systems to protect inverters and battery banks from fault conditions. - **Oil & Gas**: Deployed in hazardous locations where explosion-proof and high-reliability components are mandatory. **Installation and Maintenance Considerations** Professionals should follow WEG’s installation guidelines to ensure optimal performance. The UMBW-4D3-10 is designed for **DIN rail mounting**, simplifying installation in control panels. Key steps include: - **Proper Sizing**: Select the breaker based on the circuit’s rated current and fault current rating to avoid nuisance tripping or inadequate protection. - **Wiring Practices**: Use appropriately sized conductors and torque specifications to ensure secure connections and prevent overheating. - **Regular Inspections**: Periodic testing of the trip mechanisms and visual inspections for signs of wear or damage extend the breaker’s lifespan and maintain system safety. **Why Choose WEG for Industrial Protection?** WEG is a globally recognized leader in electrical engineering, with over six decades of expertise in motor control, automation, and power distribution solutions. The UMBW-4D3-10 reflects the company’s dedication to quality, innovation, and customer-centric design. By choosing WEG, engineers and facility managers gain access to: - **Proven Reliability**: WEG’s products are deployed in mission-critical applications worldwide, from automotive manufacturing to renewable energy projects. - **Technical Support**: Localized service teams and global distribution networks ensure prompt assistance for installation, troubleshooting, and maintenance. - **Sustainability**: WEG’s commitment to energy efficiency and eco-friendly manufacturing aligns with modern industrial sustainability goals. **Conclusion** The **WEG UMBW-4D3-10 Mini Circuit Breaker** is more than just a protective device—it’s a cornerstone of industrial electrical safety. Whether protecting motors in a factory, circuits in a data center, or systems in a renewable energy installation, this MCB delivers uncompromising performance, compliance, and peace of mind. For engineers seeking a compact, reliable, and high-quality circuit breaker, the UMBW-4D3-10 is an investment in long-term system integrity and operational efficiency.
  • Dual thermal and magnetic trip mechanisms for overload and short-circuit protection
  • Compact DIN rail-mountable design for space-efficient installations
  • High breaking capacity suitable for industrial fault conditions
  • Compliant with IEC 60898-1 and UL 1077 safety standards
  • Versatile applications in motors, distribution panels, and renewable energy systems

Specifications

Mounting Type
DIN Rail
Series
UMBW
Package Weight (Imperial)
0.99 LB
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 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.