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Overview
- 4A rated current with C-curve trip (8xIn magnetic trip)
- 4-pole design for comprehensive circuit protection
- UL489 (branch circuit) and UL1077 (equipment) certified
- Compact 17.5mm width per pole for space-efficient installation
- Visual status indication and positive trip-free snap action mechanism
Specifications
Current Rating | 4 A |
Poles | 4P |
Series | UMBW |
Package Weight (Imperial) | 0.99 LB |
Frequently Asked Questions
What is the pole configuration of this breaker?
The UMBW-4C3-4 is a 4-pole miniature circuit breaker designed for three-phase applications.
Is the UMBW-4C3-4 UL certified?
Yes, the UMBW-4C3-4 is UL489-listed for branch circuit protection and UL1077-listed for equipment protection.
What is the current rating of the UMBW-4C3-4?
The UMBW-4C3-4 has a current rating of 4A, suitable for protecting low-power industrial circuits.
What is the mounting type for the UMBW-4C3-4?
The UMBW-4C3-4 is designed for DIN rail mounting, standard in industrial electrical panels.
What is the trip curve for the UMBW-4C3-4?
The UMBW-4C3-4 features a C-curve trip characteristic with an 8xIn magnetic trip current (±20%).
Does the UMBW-4C3-4 have visual status indication?
Yes, the breaker includes visual status indication to show the on/off/tripped state.
What is the width of the UMBW-4C3-4?
The UMBW-4C3-4 has a width of 17.5mm per pole, totaling 70mm for the 4-pole configuration.
Can the UMBW-4C3-4 be used for DC applications?
Yes, the UMBW series supports both AC and DC voltages in a single series configuration.
How to Install the WEG UMBW-4C3-4 Miniature Circuit Breaker
Step-by-step guide for mounting and wiring the UMBW-4C3-4 on a DIN rail.
Estimated time: 15m
Tools needed:
Phillips screwdriver, Wire strippers, Crimping tool
Supplies needed:
DIN rail, 12-10 AWG copper wire, Cable lugs
- Mount the breaker on the DIN rail
Position the UMBW-4C3-4 on the DIN rail and press firmly until it clicks into place.
- Connect the input wires
Strip the insulation from the input wires (12-10 AWG), crimp cable lugs, and secure to the breaker's line terminals.
- Connect the output wires
Strip and crimp the output wires, then secure them to the breaker's load terminals, ensuring proper torque (typically 2.5 Nm).
- Verify installation
Visually inspect connections, ensure the breaker is securely mounted, and perform a manual trip test to confirm functionality.
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.




















