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

UMBW-4D2-1

Alternate Item Number: 13642027

Contact for Pricing

Overview

The **WEG UMBW-4D2-1 Mini Circuit Breaker** is a high-performance miniature circuit breaker (MCB) engineered for robust overcurrent protection in industrial electrical applications. Designed to safeguard branch circuits, motors, distribution panels, and power systems, this WEG product combines thermal and magnetic trip mechanisms to deliver comprehensive protection against overloads and short circuits. With its compact form factor and reliable operation, the UMBW-4D2-1 is an essential component for maintaining electrical safety and operational continuity in demanding industrial environments. **Key Features and Functionality** The UMBW-4D2-1 is part of WEG’s trusted line of industrial circuit protection devices, offering a balance of performance, durability, and ease of installation. Its dual trip mechanism ensures rapid response to fault conditions: the thermal element protects against sustained overloads by disconnecting the circuit when current exceeds rated levels for extended periods, while the magnetic element provides instantaneous interruption during short-circuit events, minimizing damage to connected equipment and wiring. This combination makes the UMBW-4D2-1 ideal for protecting sensitive industrial loads, including motors, transformers, and control panels. **Industrial Applications and Use Cases** Miniature circuit breakers like the WEG UMBW-4D2-1 are widely deployed across industries where electrical safety and system reliability are critical. Typical applications include: - **Motor protection**: Safeguarding industrial motors from overloads and phase imbalances in manufacturing plants, conveyor systems, and HVAC units. - **Distribution panels**: Serving as branch circuit protection in low-voltage switchgear, ensuring compliance with electrical codes and reducing downtime. - **Control circuits**: Providing reliable protection for PLCs, relays, and other control system components in automation and process industries. - **Renewable energy systems**: Integrating into solar and wind power distribution systems to protect inverters and battery storage units. - **Commercial and institutional buildings**: Used in lighting circuits, power distribution boards, and emergency backup systems. **Why Choose WEG for Circuit Protection?** WEG is a globally recognized manufacturer of industrial electrical equipment, known for its commitment to innovation, quality, and reliability. The UMBW-4D2-1 reflects WEG’s expertise in circuit protection, offering engineers and maintenance professionals a dependable solution for safeguarding critical infrastructure. With a reputation for durable, high-performance products, WEG MCBs are trusted by industries ranging from oil and gas to food processing, where electrical safety and uptime are non-negotiable. **Installation and Compliance Considerations** The WEG UMBW-4D2-1 is designed for easy integration into standard DIN rail mounting systems, making it compatible with most industrial control panels and distribution boards. Its modular design allows for quick replacement or reconfiguration, reducing maintenance time and costs. Professionals should ensure proper sizing based on the load requirements and local electrical codes, such as NEC or IEC standards, to optimize protection and performance. WEG provides comprehensive technical documentation, including wiring diagrams and trip curves, to support correct installation and troubleshooting. **Long-Term Benefits of Reliable Protection** Investing in a high-quality miniature circuit breaker like the UMBW-4D2-1 delivers long-term value by: - **Preventing equipment damage**: Reducing the risk of costly repairs or replacements due to electrical faults. - **Enhancing safety**: Minimizing the potential for electrical fires, arc flash incidents, and personnel hazards. - **Improving system uptime**: Ensuring continuous operation of critical processes by isolating faults quickly and accurately. - **Simplifying maintenance**: Offering modular, replaceable components that streamline servicing and reduce downtime. For industrial facilities prioritizing safety, efficiency, and reliability, the **WEG UMBW-4D2-1 Mini Circuit Breaker** is a proven solution for overcurrent protection in branch circuits and power distribution systems. Trusted by engineers worldwide, WEG’s MCBs deliver the performance and durability required to meet the demands of modern industrial applications.
  • Dual thermal and magnetic trip mechanisms for overload and short-circuit protection
  • Compact design for DIN rail mounting in industrial control panels
  • Trusted WEG quality for motors, distribution, and control circuit applications
  • Easy installation and maintenance with modular, replaceable components
  • Compliant with international electrical safety standards

Specifications

Mounting Type
DIN Rail
Series
UMBW
Package Weight (Imperial)
0.704 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.