WEG UMBW-4D3-20 - MINI CIRCUIT BREAKER UMBW-4D3-20
WEG

UMBW-4D3-20

Alternate Item Number: 13642280

UPC: 7909492434726

Contact for Pricing

Overview

The WEG UMBW-4D3-20 is a high-performance miniature circuit breaker (MCB) engineered to deliver robust overcurrent protection for a wide array of industrial electrical circuits and critical equipment. As a vital component in modern electrical systems, this MCB from WEG, a globally recognized leader in motor and drive technology, ensures operational continuity and safety by safeguarding against damaging fault conditions. Designed with a compact footprint, the UMBW-4D3-20 is ideal for applications where space is at a premium, such as in control panels, distribution boards, and motor control centers. Its integrated thermal and magnetic trip mechanisms work in tandem to provide comprehensive protection. The thermal element responds to sustained overloads, gradually tripping the breaker to prevent overheating and insulation damage. Simultaneously, the magnetic element offers instantaneous response to severe short-circuit currents, rapidly interrupting the power flow to prevent catastrophic equipment failure and potential fire hazards. This dual-action protection is fundamental for maintaining the integrity of sensitive industrial machinery and ensuring personnel safety. WEG's UMBW series circuit breakers are trusted for their reliability and durability in demanding industrial environments. The UMBW-4D3-20, with its 20A rating, is suitable for protecting branch circuits powering motors, pumps, conveyors, lighting systems, and various other industrial loads. Proper selection of circuit breakers is crucial, and this model offers a dependable solution for many standard industrial power distribution needs. Installation is straightforward, adhering to standard electrical codes and practices, making it a practical choice for electricians and maintenance professionals. Key benefits of employing the WEG UMBW-4D3-20 include: * **Enhanced Safety:** Prevents electrical fires and protects personnel from electrical hazards. * **Equipment Protection:** Safeguards motors, control systems, and other valuable industrial assets from damage due to overloads and short circuits. * **Operational Reliability:** Minimizes downtime by quickly isolating fault conditions, allowing for swift troubleshooting and restoration of power. * **Compact Design:** Facilitates efficient panel building and space optimization. * **Trusted Manufacturer:** Leverages WEG's extensive experience and reputation for quality in electrical components. This miniature circuit breaker is an essential safety device, contributing significantly to the overall safety and efficiency of industrial power systems. Its application extends across various sectors, including manufacturing, processing plants, water treatment facilities, and building automation. By automatically disconnecting power when fault conditions arise, the UMBW-4D3-20 acts as a critical line of defense, ensuring that electrical systems operate within safe parameters and that potential damage is averted. For reliable and effective overcurrent protection, the WEG UMBW-4D3-20 stands as a premier choice for industrial applications.
  • WEG UMBW-4D3-20 Miniature Circuit Breaker
  • 20 Ampere (20A) current rating
  • UMBW Series for industrial applications
  • Integrated thermal and magnetic trip mechanisms
  • Provides reliable overcurrent and short-circuit protection

Specifications

Current Rating
20 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.