WEG UMBW-1C2-40 - MINI CIRCUIT BREAKER UMBW-1C2-40
WEG

UMBW-1C2-40

Alternate Item Number: 13915503

UPC: 7909492434986

Contact for Pricing

Overview

The WEG UMBW-1C2-40 Mini Circuit Breaker is a high-performance, compact electrical protection device designed for industrial applications requiring reliable overcurrent and short-circuit protection. Part of WEG's trusted UMBW series, this 40A, 2-pole MCB combines thermal and magnetic trip mechanisms to safeguard branch circuits, motors, distribution panels, and critical industrial infrastructure from overloads and fault conditions. Engineered for durability and precision, the UMBW-1C2-40 delivers consistent performance in demanding environments where electrical safety and system uptime are paramount. Miniature circuit breakers (MCBs) like the WEG UMBW-1C2-40 are essential components in modern electrical distribution systems, offering a space-efficient alternative to fuses while providing superior operational flexibility. The thermal trip mechanism responds to sustained overloads by gradually heating a bimetallic strip, which trips the breaker to interrupt the circuit when current exceeds safe levels. Simultaneously, the magnetic trip element reacts instantaneously to short-circuit faults, ensuring rapid disconnection to prevent catastrophic damage to connected equipment. This dual-protection approach makes the UMBW-1C2-40 ideal for protecting sensitive industrial loads, including motors, transformers, and control panels. The UMBW-1C2-40 is specifically designed for 2-pole applications, making it suitable for single-phase systems or split-phase installations where phase-to-phase and phase-to-neutral protection is required. Its compact form factor allows for easy integration into tight panel spaces, while standardized mounting options ensure compatibility with industry-standard DIN rail systems. Professionals in industrial, commercial, and utility sectors rely on WEG's reputation for engineering excellence, with the UMBW series benefiting from rigorous testing and adherence to international standards such as IEC 60898-1 and UL 1077. Typical applications for the WEG UMBW-1C2-40 include motor control centers (MCCs), power distribution units (PDUs), machine tool controls, and renewable energy systems where precise current ratings and rapid fault response are critical. The breaker's 40A rating makes it particularly well-suited for protecting medium-duty motors, lighting circuits, and auxiliary equipment in manufacturing plants, water treatment facilities, and data centers. Installation is straightforward, with clear labeling and a user-friendly toggle mechanism for manual resets after fault conditions are resolved. WEG, a global leader in electric motors and automation solutions, brings decades of expertise to its circuit protection portfolio. The UMBW series reflects the company's commitment to innovation, reliability, and safety, with products trusted by engineers and technicians worldwide. Whether upgrading existing systems or designing new installations, the WEG UMBW-1C2-40 Mini Circuit Breaker provides a cost-effective, high-performance solution for industrial electrical protection. Its combination of robust construction, precise tripping characteristics, and manufacturer-backed quality ensures long-term protection and peace of mind for critical infrastructure.
  • 40A current rating for medium-duty industrial protection
  • 2-pole design for single-phase or split-phase applications
  • Thermal & magnetic trip mechanisms for overload & short-circuit protection
  • Compact DIN rail mounting for space-efficient panel integration
  • Compliant with IEC 60898-1 and UL 1077 standards
  • Manufactured by WEG, a global leader in electrical solutions
  • Easy manual reset with clear toggle mechanism
  • Ideal for motors, distribution panels, and industrial machinery

Specifications

Current Rating
40 A
Mounting Type
DIN Rail
Poles
2P
Series
UMBW
Package Weight (Imperial)
0.704 LB
Ground Lug

DNGL

Ground Lug
COVER,SET,AP-400,MC-265a~400a

64611614007

COVER,SET,AP-400,MC-265a~400a
INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

83411621001

INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M
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
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.

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.