WEG UMBW-4D3-25 - MINI CIRCUIT BREAKER UMBW-4D3-25
WEG

UMBW-4D3-25

Alternate Item Number: 13642283

UPC: 7909492434757

Contact for Pricing

Overview

The WEG UMBW-4D3-25 Mini Circuit Breaker (MCB) is a critical component for ensuring the safety and reliability of electrical systems in demanding industrial environments. Designed by WEG, a globally recognized leader in electrical equipment manufacturing, this compact breaker offers robust overcurrent protection, safeguarding both personnel and valuable equipment from the detrimental effects of electrical faults. Its primary function is to automatically interrupt the flow of electricity when abnormal current conditions, such as overloads or short circuits, are detected, thereby preventing potential damage, equipment failure, and the risk of electrical fires. This UMBW-4D3-25 model is engineered with a dual-action trip mechanism, combining thermal and magnetic elements. The thermal element responds to sustained overcurrents, typically caused by motor starting or gradual load increases, while the magnetic element reacts instantaneously to high fault currents, characteristic of short circuits. This comprehensive protection strategy makes it an indispensable device for a wide array of industrial applications. Its miniature design allows for space-efficient integration into distribution panels, control cabinets, and motor control centers (MCCs), where space is often at a premium. Professionals rely on MCBs like the WEG UMBW-4D3-25 for protecting individual branch circuits, ensuring that a fault in one part of a system does not cascade and affect others. The inherent reliability and consistent performance of WEG products instill confidence in their application across various sectors, including manufacturing, processing plants, and infrastructure projects. Installation is straightforward, adhering to standard electrical codes and practices, and its durable construction ensures longevity even in harsh industrial conditions. Choosing the right circuit breaker is paramount for operational continuity and safety, and the WEG UMBW-4D3-25 stands as a dependable solution for critical electrical protection needs. Key features and benefits of the WEG UMBW-4D3-25 include: * **Reliable Overcurrent Protection:** Effectively guards against overload and short-circuit conditions. * **Compact Miniature Design:** Ideal for space-constrained electrical enclosures and panels. * **Dual Thermal-Magnetic Trip Mechanism:** Provides comprehensive and rapid fault response. * **Enhanced Safety:** Prevents equipment damage, reduces downtime, and mitigates fire hazards. * **WEG Manufacturer Quality:** Backed by the reputation of a trusted global leader in electrical solutions. * **Versatile Industrial Applications:** Suitable for motor circuits, distribution systems, and general power protection. When specifying electrical protection for industrial machinery, control systems, or power distribution networks, the WEG UMBW-4D3-25 offers a compelling combination of performance, safety, and manufacturer pedigree. Its role in maintaining operational integrity and safeguarding investments cannot be overstated. The UNSPSC code 39121603 further categorizes this product within the electrical protection and control equipment segment, highlighting its essential function in modern industrial electrical infrastructure.
  • WEG UMBW-4D3-25 Miniature Circuit Breaker for industrial applications.
  • Provides essential overcurrent protection against overloads and short circuits.
  • Features a compact design for space-efficient installation in panels and cabinets.
  • Combines thermal and magnetic trip mechanisms for comprehensive fault response.
  • Ensures electrical safety, preventing equipment damage and potential fires.

Specifications

Current Rating
25 A
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.