WEG UMBW-1C1-2 - MINI CIRCUIT BREAKER UMBW-1C1-2
WEG

UMBW-1C1-2

Alternate Item Number: 13912233

UPC: 7909492434801

Contact for Pricing

Overview

The WEG UMBW-1C1-2 Mini Circuit Breaker (MCB) is a compact, high-performance protective device engineered for industrial electrical systems requiring precise overcurrent and short-circuit protection. Designed as a miniature circuit breaker, this WEG product combines thermal and magnetic trip mechanisms to deliver comprehensive circuit protection against overloads and fault conditions. The UMBW-1C1-2 is optimized for branch circuit applications where space efficiency and reliable operation are critical, making it an ideal choice for motor circuits, distribution panels, and industrial power distribution systems. Industrial professionals rely on WEG’s reputation for engineering excellence when selecting protective devices like the UMBW-1C1-2. WEG, a globally recognized manufacturer of electrical motors and automation solutions, applies decades of expertise in power systems to deliver circuit breakers that meet rigorous safety and performance standards. The UMBW-1C1-2 is built to integrate seamlessly into industrial environments, offering fast response times to fault conditions that help prevent equipment damage, reduce downtime, and mitigate fire risks. This MCB is particularly well-suited for applications such as: - Motor control centers and variable frequency drives (VFDs) - Industrial control panels and switchgear - Commercial and institutional electrical distribution systems - Renewable energy installations and microgrids The thermal trip mechanism responds to sustained overcurrent conditions by gradually heating a bimetallic strip, which causes the breaker to trip and interrupt the circuit. This protects sensitive equipment from damage due to prolonged overloads. The magnetic trip, on the other hand, responds almost instantaneously to short-circuit faults, providing critical protection against high-fault currents that could otherwise cause catastrophic failure. Installation and integration are straightforward thanks to the compact DIN-rail mounting design, which allows for efficient space utilization in crowded control panels. The UMBW-1C1-2 is compatible with standard industrial wiring practices and can be easily installed or replaced during maintenance operations. Its robust construction ensures long-term reliability even in harsh industrial environments, including those with high vibration, temperature fluctuations, or exposure to dust and moisture. WEG’s commitment to quality and innovation is reflected in every aspect of the UMBW-1C1-2 design. The breaker is manufactured under stringent quality control processes and is backed by WEG’s global service network, ensuring prompt support and replacement parts availability. Whether deployed in manufacturing plants, data centers, or utility substations, the UMBW-1C1-2 delivers the reliability and performance that industrial operators demand. For engineers and technicians responsible for designing, maintaining, or upgrading electrical systems, the WEG UMBW-1C1-2 Mini Circuit Breaker represents a trusted solution for protecting critical infrastructure. Its combination of compact size, dual protection mechanisms, and WEG’s engineering heritage makes it a preferred choice for professionals who prioritize safety, efficiency, and long-term system integrity.
  • Dual thermal and magnetic trip mechanisms for comprehensive overcurrent and short-circuit protection
  • Compact DIN-rail mounting design for efficient space utilization in control panels
  • Ideal for motor circuits, distribution panels, and industrial power systems
  • Fast response to fault conditions to prevent equipment damage and electrical fires
  • Backed by WEG’s global engineering expertise and service network

Specifications

Package Weight (Imperial)
0.308 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.