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

UMBW-4D2-4

Alternate Item Number: 13642039

UPC: 7909492955023

Contact for Pricing

Overview

The WEG UMBW-4D2-4 Miniature Circuit Breaker (MCB) is engineered to provide robust and reliable overcurrent protection for critical electrical circuits and equipment across a wide spectrum of industrial applications. As a vital component in any modern electrical system, this MCB ensures the safety and operational integrity of your machinery and personnel by automatically interrupting power flow when fault conditions arise. Designed with both thermal and magnetic trip mechanisms, the UMBW-4D2-4 offers comprehensive protection against two primary electrical hazards: overloads and short circuits. Thermal tripping, typically activated by a bimetallic strip, responds to sustained overcurrents that can gradually overheat conductors and components, leading to insulation breakdown and potential fires. Magnetic tripping, on the other hand, provides instantaneous response to sudden, high-magnitude fault currents, such as those caused by short circuits, which can result in severe equipment damage and immediate safety risks. This compact circuit breaker is an ideal solution for protecting branch circuits within motor control centers, distribution panels, and various industrial power systems. Its miniature design allows for space-saving installations, making it suitable for applications where panel real estate is at a premium. The inherent design of MCBs, including the WEG UMBW-4D2-4, ensures that they are a fundamental safety device, preventing costly downtime and mitigating the risk of electrical fires and equipment destruction. Professionals rely on these devices for their consistent performance and ease of integration into existing electrical infrastructure. WEG is a globally recognized manufacturer renowned for its commitment to quality, innovation, and reliability in electrical products. Their extensive experience in motor and power generation technology translates into circuit protection devices that meet stringent industry standards. The UMBW-4D2-4 exemplifies this dedication, offering dependable performance that industrial users can trust. When selecting circuit protection, factors such as current rating, trip characteristics, and breaking capacity are paramount. While specific numerical ratings for this model are detailed in its technical datasheet, its application in protecting motors, lighting circuits, and general power distribution underscores its versatility. Installation should always be performed by qualified electricians in accordance with local and national electrical codes to ensure optimal safety and functionality. The UMBW-4D2-4 is a testament to WEG's ability to deliver essential safety and protection solutions for demanding industrial environments, safeguarding investments and ensuring continuity of operations.
  • Provides essential overcurrent protection for industrial electrical circuits.
  • Combines thermal and magnetic trip mechanisms for overload and short-circuit protection.
  • Compact miniature design ideal for space-constrained applications.
  • Ensures equipment safety and prevents electrical fires.
  • Reliable performance from trusted manufacturer WEG.

Specifications

Package Weight (Imperial)
0.704 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.