WEG UMBW-4D2-10 - MINI CIRCUIT BREAKER UMBW-4D2-10
WEG

UMBW-4D2-10

Alternate Item Number: 13642072

UPC: 7909492434627

Contact for Pricing

Overview

The WEG UMBW-4D2-10 Mini Circuit Breaker is a high-performance, compact protection device engineered for industrial electrical systems requiring reliable overcurrent and short-circuit protection. Designed by WEG, a global leader in electrical engineering solutions, this 4-pole (4P) miniature circuit breaker (MCB) delivers precise thermal and magnetic tripping mechanisms to safeguard branch circuits, distribution panels, and critical industrial equipment from overloads and fault conditions. With a rated current of 10 amperes, the UMBW-4D2-10 is ideal for protecting sensitive motor circuits, control panels, and power distribution networks where space efficiency and operational reliability are paramount. This industrial-grade circuit breaker is part of the UMBW series, a trusted line of protection devices known for durability, precision, and compliance with international safety standards. The UMBW-4D2-10 combines a compact footprint with robust performance, making it suitable for installation in tight control cabinets, switchgear assemblies, and industrial control rooms. Its 4-pole configuration supports balanced three-phase systems with neutral protection, ensuring comprehensive circuit isolation and enhanced safety during maintenance or fault events. Key applications for the WEG UMBW-4D2-10 include motor control centers (MCCs), variable frequency drives (VFDs), industrial automation systems, and building management systems. It is commonly deployed in sectors such as manufacturing, mining, oil & gas, water treatment, and renewable energy, where reliable power distribution and fault protection are critical to operational continuity. The breaker’s automatic disconnection feature prevents equipment damage, reduces downtime, and mitigates the risk of electrical fires—key priorities in high-reliability industrial environments. Professionals select the UMBW-4D2-10 for its combination of technical precision and ease of integration. Installation is straightforward thanks to standardized DIN rail mounting compatibility and clear terminal labeling, enabling quick deployment in retrofit or new construction projects. WEG’s reputation for engineering excellence ensures that the UMBW series meets stringent performance and safety certifications, including IEC and UL standards, providing peace of mind in demanding industrial applications. Whether protecting sensitive electronics in a factory automation line or safeguarding a motor circuit in a heavy-duty conveyor system, the WEG UMBW-4D2-10 delivers dependable protection with minimal maintenance. Its compact design, high interrupting capacity, and long service life make it a cost-effective solution for modern industrial electrical protection strategies. Trusted by engineers and facility managers worldwide, WEG continues to set the benchmark for reliable, high-quality circuit protection in industrial power systems.
  • 10A rated current with 4-pole (4P) configuration for balanced three-phase protection
  • Thermal and magnetic trip mechanisms for overload and short-circuit protection
  • Compact design ideal for DIN rail mounting in control panels and switchgear
  • Part of WEG’s trusted UMBW series, compliant with IEC and UL safety standards
  • Suitable for motor circuits, MCCs, VFDs, and industrial automation systems

Specifications

Connection Type
DIN Rail
Current Rating
10 A
Mounting Type
DIN Rail
Poles
4P
Series
UMBW
Package Weight (Imperial)
0.704 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.