WEG UMBW-4D3-30 - MINI CIRCUIT BREAKER UMBW-4D3-30
WEG

UMBW-4D3-30

Alternate Item Number: 14405687

UPC: 7909492466949

Contact for Pricing

Overview

The WEG UMBW-4D3-30 is a robust 4-pole miniature circuit breaker (MCB) engineered for superior electrical protection in demanding industrial environments. Designed to safeguard electrical circuits and sensitive equipment from damaging overcurrents, this MCB is an indispensable component for maintaining operational continuity and safety. Its compact design belies its powerful protective capabilities, making it ideal for applications where space is at a premium but reliability is paramount. At its core, the UMBW-4D3-30 integrates advanced thermal and magnetic trip mechanisms. The thermal element provides protection against sustained overloads, which can gradually heat up conductors and damage insulation over time. The magnetic element offers instantaneous tripping in response to severe short-circuit conditions, preventing catastrophic failures and potential fires. This dual-action protection ensures that your electrical systems are shielded against a wide spectrum of fault scenarios. Key applications for the WEG UMBW-4D3-30 include: * **Motor Circuits:** Protecting electric motors from overload and short circuits, crucial for preventing downtime and costly repairs. * **Distribution Panels:** Serving as a reliable branch circuit protection device in industrial switchboards and control panels. * **Industrial Power Systems:** Ensuring the integrity of power distribution networks across manufacturing plants, processing facilities, and heavy industry. * **Automation and Control Systems:** Safeguarding control cabinets and electronic components from electrical disturbances. WEG is a globally recognized leader in the manufacturing of electrical equipment, renowned for its commitment to quality, innovation, and performance. The UMBW-4D3-30 embodies this dedication, offering a dependable solution for critical protection needs. Its construction adheres to stringent industry standards, ensuring long-term operational integrity and user safety. Professionals choose WEG for its proven track record and the assurance of reliable performance in challenging industrial settings. Installation of the UMBW-4D3-30 is straightforward, designed to integrate seamlessly into standard DIN rail mounting systems commonly found in industrial control panels and enclosures. Its 30-ampere rating and 4-pole configuration make it versatile for various single and three-phase applications. By automatically disconnecting power when fault conditions are detected, this circuit breaker significantly reduces the risk of equipment damage, electrical fires, and potential injury, making it an essential safety device for any industrial facility.
  • WEG UMBW-4D3-30 4-Pole Miniature Circuit Breaker
  • 30 Ampere (30A) rated for industrial applications
  • Integrated thermal and magnetic trip mechanisms for comprehensive protection
  • Ensures reliable overcurrent and short-circuit protection
  • Ideal for motor circuits, distribution panels, and industrial power systems

Specifications

Current Rating
30 A
Mounting Type
DIN Rail
Poles
4
Series
UMBW
Package Weight (Imperial)
1 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.