WEG UMBW-4D3-1 - MINI CIRCUIT BREAKER UMBW-4D3-1
WEG

UMBW-4D3-1

Alternate Item Number: 13642160

UPC: 7909492434672

Contact for Pricing

Overview

The WEG UMBW-4D3-1 is a robust miniature circuit breaker (MCB) engineered for reliable electrical protection in demanding industrial environments. As a critical component in safeguarding electrical systems, this 4-pole breaker provides essential overcurrent protection, preventing damage to sensitive equipment and mitigating the risk of electrical fires. WEG, a globally recognized leader in electrical equipment manufacturing, delivers this MCB with a commitment to quality and performance, ensuring peace of mind for facility managers and electrical engineers. This UMBW-4D3-1 model is designed to offer comprehensive protection against both overload and short-circuit conditions. Its integrated thermal and magnetic trip mechanisms work in tandem to detect abnormal current flows. The thermal element responds to sustained overcurrents, typically caused by equipment overloads, while the magnetic element reacts instantaneously to sudden, high-magnitude fault currents, such as those occurring during a short circuit. Upon detection of a fault, the circuit breaker automatically disconnects the power supply, thereby protecting downstream components and personnel from potential hazards. This automatic disconnection is a fundamental safety feature, crucial for maintaining operational integrity and preventing costly downtime. The compact design of miniature circuit breakers, including the WEG UMBW-4D3-1, makes them ideal for applications where space is at a premium. They are commonly installed in distribution panels, motor control centers, and control cabinets, serving as the primary protection for individual branch circuits. The 4-pole configuration ensures complete isolation of all live conductors, which is often a requirement for specific types of industrial machinery and systems, particularly those with three-phase power supplies or where neutral conductor switching is mandated for safety. Key applications for the WEG UMBW-4D3-1 include: * Protection of three-phase motors and associated control circuits. * Branch circuit protection in industrial power distribution systems. * Safeguarding control panels and automation equipment. * Ensuring safety in manufacturing plants, processing facilities, and heavy industry. * Applications requiring complete isolation of all conductors. Selecting the correct circuit breaker is paramount for effective electrical safety. Factors such as the rated current, tripping characteristics, and the number of poles must align with the specific requirements of the circuit being protected. The WEG UMBW-4D3-1, with its reliable construction and proven performance, stands as a dependable choice for professionals seeking robust and efficient electrical protection solutions. Trust WEG for your critical electrical infrastructure needs.
  • WEG UMBW-4D3-1 4-pole miniature circuit breaker
  • Provides reliable overcurrent protection for industrial applications
  • Combines thermal and magnetic trip mechanisms for overload and short-circuit protection
  • Compact design suitable for distribution panels and control cabinets
  • Essential safety device for motor circuits and power systems

Specifications

Poles
4
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.