WEG Strategic Partner Distributor
WEG MSW AC-40 B 1NO - AUXILIARY CONTACT MSW AC 40-B-1NO

WEG MSW AC-40 B 1NO AUXILIARY CONTACT MSW AC 40-B-1NO

Alternate Item Number: 11899457

UPC: 7909018117010

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The **WEG MSW AC-40 B 1NO** is a single-pole auxiliary contact designed for WEG MSW series disconnect switches (MSW25/MSW40) and enclosed disconnect switches (MSWB25/MSWB40). It provides a 1NO (normally open) contact for signal transmission in industrial control systems. Manufactured by WEG, a global leader in electric motor and automation technology, this auxiliary contact is used to monitor equipment status, enable safety interlocks, and support lockout/tagout (LOTO) compliance. It is rated for 690V AC/DC insulation voltage and 6A operating current per IEC 60947-5-1. Ideal for motor control centers, disconnect switches, and safety systems in manufacturing, mining, and oil & gas industries.
  • 1NO auxiliary contact for WEG MSW disconnect switches (MSW25/MSW40) and enclosed types (MSWB25/MSWB40)
  • Rated 690V insulation voltage and 6A operating current per IEC 60947-5-1
  • Supports lockout/tagout (LOTO) compliance and safety interlock systems
  • Used in motor control centers, disconnect switches, and industrial automation
  • Manufactured by WEG, a trusted name in industrial electric motors and automation

Specifications

Poles
1NO
Series
MSW
Package Weight (Imperial)
0.033 LB
JB5-2 2 POLE JUMPER 5.2MM SPACING

1SNK905302R0000

JB5-2 2 POLE JUMPER 5.2MM SPACING
Ruggedized 5.7 Mbps CopperLink Multi-Drop Ethernet Extender; 2 x CopperLink; 4 x10/100; -40 to 85C; 100-240VAC

CL1314MDE/EUI

Ruggedized 5.7 Mbps CopperLink Multi-Drop Ethernet Extender; 2 x CopperLink; 4 x10/100; -40 to 85C; 100-240VAC
NEUTRAL POLE MSW AP 160-B-1NO

MSW AP 160-B-1-NA

NEUTRAL POLE MSW AP 160-B-1NO
ION CHAMBER ASSY, ASH

125074-001

ION CHAMBER ASSY, ASH
HPE Superdome 2 In-line Power Connector

A6440A

HPE Superdome 2 In-line Power Connector
DRAW PLATE POLY BLACK | Size 2

291A346

DRAW PLATE POLY BLACK | Size 2
Single Key (M12) Micro-Link Cable Assembly, PVC Braided, Male/Female, 5 pole, 16.4', 22 AWG

305K0164H

Single Key (M12) Micro-Link Cable Assembly, PVC Braided, Male/Female, 5 pole, 16.4', 22 AWG
This USB-C Female to USB-A Male SuperSpeed USB 5Gbps Adapter Converter is the perfect solution for connecting a USB-C device to a laptop or desktop computer that does not have a USB-C port. Simply connect the adapter converter into a USB-A port of a laptop or desktop computer and enjoy plug and play connectivity for USB-C devices. This adapter converter supports a data rate up to 5Gbps for data transfer and 900mA of power for device operation and charging. This adapter converter is compatible with earlier USB versions. The USB-C connector has a symmetrical design which is identical on both sides, so no more worrying about whether it's upside-down or right-side-up. It will plug in the first time, every time�while preventing damage to the connector port from frequent plugging and unplugging. Connector 1: (1) USB 3.0 A Male Connector 2: (1) USB-C Female Features * Small form factor for portability * Plug and Play�no driver required * Up to 5Gbps data transfer and 900mA of power * Compatible with USB 3.0 specification and earlier versions * Reversible, symmetrical USB-C connector

CG54427

This USB-C Female to USB-A Male SuperSpeed USB 5Gbps Adapter Converter is the perfect solution for connecting a USB-C device to a laptop or desktop computer that does not have a USB-C port. Simply connect the adapter converter into a USB-A port of a laptop or desktop computer and enjoy plug and play connectivity for USB-C devices. This adapter converter supports a data rate up to 5Gbps for data transfer and 900mA of power for device operation and charging. This adapter converter is compatible with earlier USB versions. The USB-C connector has a symmetrical design which is identical on both sides, so no more worrying about whether it's upside-down or right-side-up. It will plug in the first time, every time�while preventing damage to the connector port from frequent plugging and unplugging. Connector 1: (1) USB 3.0 A Male Connector 2: (1) USB-C Female Features * Small form factor for portability * Plug and Play�no driver required * Up to 5Gbps data transfer and 900mA of power * Compatible with USB 3.0 specification and earlier versions * Reversible, symmetrical USB-C connector
Punch Die set for Rectangular Connector, Size 77.27

CHI-16-PUNCH

Punch Die set for Rectangular Connector, Size 77.27
Degson DK-8/24-FC — Heavy-duty insert, Number of contacts:8/24+PE, Dimension:10B, Rated voltage :400/160V, Rated current:16/10A, Female insert, Crimping connection. 8/24, 10B, 16/10A, Crimping connection. Crimping connection technology, high wiring efficiency. Suitable for vibration occasions. The wiring harness can be pre-installed.

DK-8/24-FC

Degson DK-8/24-FC — Heavy-duty insert, Number of contacts:8/24+PE, Dimension:10B, Rated voltage :400/160V, Rated current:16/10A, Female insert, Crimping connection. 8/24, 10B, 16/10A, Crimping connection. Crimping connection technology, high wiring efficiency. Suitable for vibration occasions. The wiring harness can be pre-installed.
16 analog input - 0~20/4~20mA - 16bit resolution - 20pt connector (use cable art. 313296)

100-8141

16 analog input - 0~20/4~20mA - 16bit resolution - 20pt connector (use cable art. 313296)
Switching Function: MaintainedPanel Cutout: � 22.3 mm Shape: RoundIllumination: No Labeling Option: NoContact Type: 4-Pole M12 Connector (Integrated) A Coded Contact Equipment: 2 x NO

SSWWBII_C009

Switching Function: MaintainedPanel Cutout: � 22.3 mm Shape: RoundIllumination: No Labeling Option: NoContact Type: 4-Pole M12 Connector (Integrated) A Coded Contact Equipment: 2 x NO

Frequently Asked Questions

What disconnect switches is this auxiliary contact compatible with?

The MSW AC-40 B 1NO is designed for WEG MSW25/MSW40 disconnect switches and MSWB25/MSWB40 enclosed disconnect switches.

What is the rated insulation voltage for this auxiliary contact?

The rated insulation voltage is 690V according to IEC and VDE 0660 standards.

What is the operating current rating?

The rated operating current is 6A per IEC 60947-5-1 for AC applications.

Is this auxiliary contact suitable for LOTO compliance?

Yes, the MSW AC-40 B 1NO supports lockout/tagout (LOTO) compliance by enabling visible isolation and secure locking.

What industries use this auxiliary contact?

Common industries include manufacturing, mining, oil & gas, water treatment, and HVAC for motor control and safety systems.

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.