WEG UMBW-1B3-5 - MINI CIRCUIT BREAKER UMBW-1B3-5
WEG

UMBW-1B3-5

Alternate Item Number: 14353473

UPC: 7909492435495

Contact for Pricing

Overview

The WEG UMBW-1B3-5 Mini Circuit Breaker is a high-performance, compact electrical protection device engineered for industrial and commercial applications where space efficiency and reliability are critical. Designed by WEG, a globally recognized leader in industrial automation and electrical solutions, this circuit breaker delivers precise overload and short-circuit protection to safeguard sensitive equipment and maintain operational continuity. Its durable construction and precision engineering ensure long-term performance, even in demanding environments such as manufacturing plants, data centers, commercial buildings, and infrastructure projects. Mini circuit breakers like the UMBW-1B3-5 are essential components in low-voltage electrical distribution systems, providing a balance between compact footprint and robust protection. The UMBW-1B3-5 is particularly well-suited for panelboards, control cabinets, and distribution boards where space is at a premium but protection cannot be compromised. Its modular design allows for quick installation and integration into existing systems, reducing downtime during upgrades or maintenance. Key features of the WEG UMBW-1B3-5 include a compact form factor that enables installation in tight spaces without sacrificing performance. The breaker is engineered with high-quality materials and advanced thermal-magnetic tripping mechanisms to respond rapidly to fault conditions, minimizing damage to connected equipment. It is designed to meet stringent international safety standards, ensuring compliance with global electrical codes and regulations. Typical applications for the UMBW-1B3-5 span a wide range of industries, including manufacturing, automation, renewable energy systems, and building infrastructure. In industrial automation, it protects control circuits, sensors, and actuators from electrical faults that could disrupt production lines. In commercial buildings, it safeguards lighting circuits, HVAC systems, and IT infrastructure, ensuring reliable power distribution and reducing the risk of costly outages. Its compatibility with standard DIN rail mounting systems makes it a versatile choice for panel builders and system integrators. Professionals select the WEG UMBW-1B3-5 for its combination of reliability, compactness, and ease of integration. The breaker’s compatibility with WEG’s ecosystem of industrial electrical products—including contactors, relays, and motor starters—enhances system coherence and simplifies maintenance. WEG’s reputation for innovation and quality in industrial electrical solutions further reinforces the UMBW-1B3-5 as a trusted choice for engineers and facility managers seeking dependable circuit protection. With a focus on operational safety and efficiency, this mini circuit breaker is a critical investment for any facility prioritizing uptime and equipment longevity.
  • Compact design for installation in tight spaces
  • Thermal-magnetic tripping for rapid fault response
  • Durable construction for long-term reliability
  • DIN rail mounting for easy integration
  • Compliant with international safety standards

Specifications

Material
Poly
Mounting Type
DIN Rail
Series
UMBW
Package Weight (Imperial)
1 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.