Free UPS Ground on All Orders!
Request a
Fast Quote
Account
Cart
Quote
+1 (919) 205-4392
Allen Bradley Bulletin 500 Accessories W73

Product image is representative; revision or series may vary. Contact us to request a specific version.

W73

|
Need a Specific Revision?

The W73 thermal overload relay heater element is a component manufactured by Allen Bradley for protection against overheating. Designed for reliability, it can handle various full load amps depending on its size classification, from 58 A in Size 2 to 77 A in Size 4.

Call for an immediate quote
2 Year DO Supply Warranty
Available
Ships from Raleigh, NC
Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
Learn more
Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for W73

ManufacturerAllen Bradley
Product TypeThermal Overload Relay Heater Element
Product LineBulletin 500 Accessories
Part NumberW73
UPC781180512834
Trip Class20 Class
Alloy TypeEutectic
Reset TypeManual
Number of Poles1 Pole
Size 2 Full Load Amps (FLA)58.0 A
Size 3 Full Load Amps (FLA)67.0 A to 72.0 A
Size 4 Full Load Amps (FLA)74.0 A to 77.0 A
Minimum Storage Temperature-40°C
Maximum Storage Temperature85°C
Relative Humidity5 to 95% (non-condensing)
Request a Repair

The Allen Bradley W73 is a thermal overload relay heater element crafted for effective motor protection in electrical systems. It operates under a trip class of 20 and utilizes eutectic alloy technology, ensuring responsive action during overload situations. This heater element is designed for manual reset after tripping.

The W73 has a specification for one pole, making it suitable for various motor sizes. Specific full load amp capacities allow for proper sizing selection, with 58.0 A designated for Size 2 applications and a range of 67.0 A to 72.0 A for Size 3. Size 4 configurations can handle full load amps from 74.0 A to 77.0 A, addressing a variety of motor requirements.

For storage, this relay heater element can tolerate temperatures between -40°C and 85°C, making it adaptable to different environments. It’s built to perform under conditions of relative humidity that range from 5% to 95% (non-condensing), providing reliable operation in many settings. The W73 thermal overload relay heater element is an essential component for safeguarding electrical systems from overload damage.