WEG UMBW-4D1-40 - MINI CIRCUIT BREAKER UMBW-4D1-40
WEG

UMBW-4D1-40

Alternate Item Number: 14363039

UPC: 7909492438007

Contact for Pricing

Overview

The WEG UMBW-4D1-40 Miniature Circuit Breaker (MCB) is engineered to provide robust and reliable overcurrent protection for a wide array of industrial electrical circuits and sensitive equipment. As a critical safety device, this MCB plays an indispensable role in safeguarding against potential damage caused by electrical faults, thereby ensuring operational continuity and preventing costly downtime. At its core, the UMBW-4D1-40 combines advanced thermal and magnetic trip mechanisms. The thermal element is designed to detect gradual increases in current, such as those caused by motor overloads or prolonged high-demand operations. When the ambient temperature or the current exceeds a predetermined threshold for a sufficient duration, the thermal trip activates, initiating a disconnection of power. Complementing this is the magnetic trip, which responds instantaneously to sudden, high-magnitude current surges characteristic of short-circuit events. This dual-action protection system is fundamental to preventing equipment failure, reducing the risk of electrical fires, and maintaining the integrity of the entire electrical distribution system. WEG, a globally recognized leader in the manufacturing of electrical equipment, brings its extensive expertise and commitment to quality to the UMBW-4D1-40. This miniature circuit breaker is built to stringent industry standards, ensuring dependable performance even in demanding industrial environments. Its compact design makes it an ideal solution for applications where space is at a premium, such as in control panels, motor control centers (MCCs), and distribution boards. The UMBW-4D1-40 is suitable for protecting various types of loads, including: * Motor circuits, offering crucial protection against overload and short circuits that can damage motor windings. * Branch circuits within industrial facilities, ensuring the safety of lighting, heating, and other ancillary equipment. * Control circuits, safeguarding sensitive electronic components and logic systems. * General power distribution applications, providing a reliable point of protection for downstream loads. Installation and integration of the WEG UMBW-4D1-40 are straightforward, designed for compatibility with standard DIN rail mounting systems commonly found in industrial electrical enclosures. The clear labeling and intuitive design facilitate proper wiring and maintenance, reducing the potential for installation errors. Professionals rely on MCBs like the UMBW-4D1-40 for their predictable performance, ease of resetting after a fault (compared to fuses), and their ability to isolate specific circuit sections without affecting the entire system. This granular control over fault isolation is paramount in complex industrial settings where maintaining power to unaffected areas is critical. Choosing the right circuit breaker is a crucial aspect of electrical system design and maintenance. The WEG UMBW-4D1-40, with its robust construction and proven protection capabilities, represents a sound investment for any industrial operation prioritizing safety, reliability, and operational efficiency. Its inclusion in your electrical infrastructure signifies a commitment to protecting valuable assets and personnel from the hazards of electrical faults.
  • Reliable overcurrent protection for industrial electrical circuits.
  • Combines thermal and magnetic trip mechanisms for comprehensive fault detection.
  • Compact design ideal for control panels and distribution boards.
  • Safeguards equipment against overload and short-circuit conditions.
  • Manufactured by WEG, a trusted name in electrical equipment.

Specifications

Current Rating
40 A
Mounting Type
DIN Rail
Series
UMBW
Series
UMBW-4D1
Package Weight (Imperial)
0.3 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.