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WEG RW_E Thermal Overload Relay, 1 NO/1 NC, 40A FLC, DIN Rail, 1.5 W, Screw Terminals, RWB40E-3-A4U040

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WEG RW_E Thermal Overload Relay, 1 NO/1 NC, 40A FLC, DIN Rail, 1.5 W, Screw Terminals, RWB40E-3-A4U040

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Category Overload Relays Brand WEG Condition New

Specifications

Country of Origin	Brazil
Brand	WEG
Length	96mm
Model	RWB40E-3-A4U040
Depth	84.1mm
Width	45mm
Mount Type	DIN Rail
Series	RW_E
Power Rating	1.5W
Maximum Operating Temperature	60°C
Minimum Operating Temperature	-20°C
Terminal type	Screw
Supply Voltage	100, 50V
Contact Voltage	690V ac
Reset Method	Automatic & Manual
Normal State Configuration	1 NO/1 NC
Relay Contact Current	40, 8A
Number of Auxiliary Contacts	2
Pole and Throw Configuration	3
FLC Motor Rating	40A
Adjustable Current Range	8 → 40 A

Key Features

Designed for overload protection of industrial motors and equipment.
Features 1 normally open and 1 normally closed auxiliary contact.
Supports adjustable current range from 8 A to 40 A for flexible installation.
DIN rail mounting and screw terminals ensure easy and secure setup.
Manual and automatic reset modes add operational versatility.
Accommodates a contact voltage up to 690 V AC for broad application compatibility.
Robust construction with phase-failure sensitivity and reliable tripping class 10 performance.

Product Description

WEG RWB40E-3-A4U040 thermal overload relay offers advanced protection for electric motors and equipment in industrial and commercial environments. Engineered for reliability, this relay is designed to interrupt the circuit in case of overload, preventing motor damage and downtime.

With a configuration of 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, this relay is suitable for applications requiring flexible signaling or interlocking. Its adjustable current range from 8 to 40 A allows precise fitting with various motor sizes and loads, while the full load current rating of 40A enables compatibility with a broad range of installations.

Installation is straightforward thanks to its DIN rail mounting style and secure screw terminals, making it ideal for modular panels and modern automation systems. The relay can be reset either automatically or manually, providing extra operational flexibility in demanding environments.

Rated for up to 690V AC contact voltage and supporting power up to 1.5 W, the RWB40E-3-A4U040 relay ensures high electrical endurance and stable connection under continuous usage. It operates effectively in temperatures from -20°C to 60°C, and features a rugged construction conforming to prominent standards for reliability and safety.

40A full load current and adjustable trip range from 8A to 40A accommodate multiple motor capacities. Auxiliary contacts (1 NO/1 NC) enable versatile control and alarm integration. Suitable for industrial automation, manufacturing plants, motor control centers, and HVAC systems.

Supports compliance with IEC and EU regulations for safety and efficiency. Compact form factor (96 mm length, 45 mm width, 84.1 mm depth) saves valuable panel space.

Typical use cases include motor starters, heavy machinery, production line equipment, and critical facility controls in sectors like mining, chemical processing, food & beverage, and utilities. The reliable operation and compliance with international standards make the WEG RWB40E-3-A4U040 the preferred choice for industrial professionals seeking robust protection for their electrical motors and infrastructure.

Explore more Overload Relays and automation control solutions from WEG and leading industrial brands in the EnvMart automation and electrical components category.

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Frequently Asked Questions

The adjustable current range of the WEG RWB40E-3-A4U040 thermal overload relay is from 8 A to 40 A, allowing for flexible installation with various motor sizes and loads.

This relay can accommodate a contact voltage of up to 690 V AC, making it suitable for a broad range of applications.

The WEG RWB40E-3-A4U040 features both automatic and manual reset methods, providing operational versatility in different environments.

The dimensions of the WEG RWB40E-3-A4U040 are 96 mm in length, 45 mm in width, and 84.1 mm in depth.

This model supports DIN rail mounting, which facilitates easy and secure installation in modular panels.

The power rating of this thermal overload relay is 1.5 W, ensuring efficient operation.

This relay is equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, allowing for flexible signaling or interlocking applications.

The operating temperature range for the WEG RWB40E-3-A4U040 is from -20°C to 60°C, making it suitable for various industrial environments.

The full load current rating of the WEG RWB40E-3-A4U040 is 40 A, allowing it to handle a wide range of motor capacities.

This thermal overload relay utilizes screw terminals, ensuring a secure connection during installation.

The WEG RWB40E-3-A4U040 is manufactured in Brazil, reflecting its industrial design and engineering.

This thermal overload relay is suitable for applications such as motor starters, heavy machinery, production line equipment, and HVAC systems.