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Best Overload Relays of 2026

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Harvey Wall

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Overload relays are electrical devices that protect motors from damage caused by overloading, overcurrents, or phase failure. They are commonly used in industrial settings to prevent equipment damage and ensure safe operation. These relays detect and respond to abnormal conditions by interrupting the power supply to the motor, thereby preventing any further damage. They are available in a variety of sizes and types to match the specific requirements of different applications. Overload relays are an essential component of any motor control system and are highly recommended for ensuring safe and reliable operation.

At a Glance: Our Top Picks

Top 6 Overload Relays

#TOP 1

sourcing map PTC Starter Relay and Overload Protector

sourcing map PTC Starter Relay and Overload Protector Cover

sourcing map Refrigerators PTC Starter Relay 3 Pin 4.7 Ohm Overload Protector 1/2HP for Fridges Beverage Freezers

The sourcing map PTC Relay is designed to effectively start and control your refrigerator's compressor, ensuring efficient operation. It protects your appliance by preventing overheating and excessive current, which can lead to motor damage. This relay is compatible with a range of fridges, freezers, and beverage coolers, making it a versatile choice for various refrigeration systems. Installation is straightforward, allowing you to quickly replace old components and restore function to your appliance with ease.

9.8
FTB Score

What We Like

  • Protects against overheating
  • Easy to install
  • Compatible with various appliances
  • Controls compressor operation
  • Prevents motor damage
#TOP 2

Schneider Electric TeSys LRD Thermal Relay 12...18 A

Schneider Electric TeSys LRD Thermal Relay 12...18 A Cover

Schneider Electric, Thermal overload relay, TeSys LRD, 12...18 A, class 10A, LRD21

The TeSys LRD Thermal Relay by Schneider Electric is designed to effectively protect your a.c. circuits and motors from overloads. With a digital customer experience for technical documents, you can easily access the information you need. The multiple international certifications ensure reliability and compliance, making it a trusted choice. Additionally, the pre-mounted baseplate with busbar interconnection allows for quick and simple installation, saving you time and effort during setup.

9.7
FTB Score

What We Like

  • Protects against overloads
  • Easy access to technical documents
  • Multiple international certifications
  • Quick installation process
#TOP 3

YWBL-WH CPN NR2-25 Electric Thermal Relay

  • YWBL-WH
  • YWBL-WHgc803mwx19
  • Default
YWBL-WH CPN NR2-25 Electric Thermal Relay Cover

Three Phase Electric Thermal Overload Relay 7A To 10A With Phase Break Protection For Motor Control Applications

The YWBL-WH Thermal Relay is designed to protect your electric motor from overload conditions. This ensures that you can operate your equipment safely without the risk of phase breaks. It features both manual and automatic reset options, giving you flexibility in managing your circuit. Additionally, the temperature compensation feature helps maintain optimal performance in varying conditions, while the trip indication allows you to easily monitor the relay’s status. With a convenient test button and stop button, you can quickly assess and control your system.

9.5
FTB Score

What We Like

  • Protects against motor overload
  • Manual and automatic reset
  • Temperature compensation feature
  • Easy trip indication
  • Includes test and stop buttons
#TOP 4

sourcing map PTC Starter Relay and Overload Protector

sourcing map PTC Starter Relay and Overload Protector Cover

sourcing map Refrigerators PTC Starter Relay 1 Pin 4.7 Ohm Overload Protector 1/2HP for Fridges Beverage Freezers

The sourcing map Starter Relay is essential for starting and controlling your refrigerator compressor. This product not only initiates the refrigeration system but also protects the compressor motor from overheating and excessive current. By preventing potential damage, it ensures your appliances run smoothly and efficiently. With its compact sizes, this relay and overload protector can fit various models, making it a versatile choice for refrigerators, freezers, and beverage coolers. Installing it is straightforward, allowing you to quickly restore your appliance's functionality.

9.3
FTB Score

What We Like

  • Protects compressor from overheating
  • Suitable for various appliances
  • Easy to install and replace
  • Compact and versatile design
#TOP 5

Schneider Electric TeSys LRD Thermal Overload Relay

Schneider Electric TeSys LRD Thermal Overload Relay Cover

Schneider Electric TeSys LRD - Differential Thermal Overload Relay, 4…6A Adjustment Range, Class 10A, Motor Protection, LRD10

The TeSys LRD Relay by Schneider Electric is specifically designed to protect your a.c. circuits and motors from overloads, ensuring reliable operation. Its modern appearance enhances the look of your machines, making them more appealing. You can benefit from the convenient maintenance guide available through EcoStruxureTM Facility Expert, allowing for efficient upkeep. With multiple international certifications, this relay guarantees adherence to high safety standards, giving you peace of mind in your operations.

9.3
FTB Score

What We Like

  • Protects against overloads
  • Modern design for machines
  • Convenient maintenance guide
  • Multiple international certifications
  • Easy installation
#TOP 6

sourcing map 4pcs PTC Starter Relay and Overload Protector

sourcing map 4pcs PTC Starter Relay and Overload Protector Cover

sourcing map 4pcs Refrigerators PTC Starter Relay 1 Pin 4.7 Ohm Overload Protector 1/2HP for Fridges Beverage Freezers

The sourcing map Overload Protector is essential for starting and controlling the compressor in various refrigeration systems. It protects your compressor motor from overheating and excessive current, ensuring longevity and reliable performance. You can use this product across a range of appliances, including refrigerators, freezers, and beverage coolers. Installation is straightforward, allowing you to replace the old components quickly and reconnect your appliance with ease, giving you peace of mind knowing your equipment is safeguarded.

9.3
FTB Score

What We Like

  • Effective compressor protection
  • Versatile for multiple appliances
  • Easy installation process
  • Compact size fits various models

Frequently Asked Questions (FAQs)

1. What are 2 types of overload relays?

Overload Relay Types. These are classified into two types namely thermal overload relay and magnetic overload relay.

2. Where do you put an overload relay?

Rule-of-thumb: The external motor overload relay is always set to the nominal current shown on the nameplate. However if motors are designed with a service factor, which is then shown on the nameplate eg.

3. What causes thermal overload trip?

Causes may include a large change in load (e.g., a scrap grinder is fed too much at a time), misalignment, a broken drive gear, or improper motor drive settings. Power problems (e.g., low voltage or low power factor) also may cause an overload condition.

Editor's Notes

During our overload relay research, we found 99 overload relay products and shortlisted 6 quality products. We collected and analyzed 4,223 customer reviews through our big data system to write the overload relays list. We found that most customers choose overload relays with an average price of £13.96.

The overload relays are available for purchase. We have researched hundreds of brands and picked the top brands of overload relays, including sourcing map, Schneider Electric, YWBL-WH.

Written by

Harvey Wall Avatar

Harvey Wall

Harvey Wall was born and raised in Norwich. He mastered the art of tool production and finished at the prestigious Norwich University. His area of interest include cutting tools, abrasive finishing and power tools. Harvey is always looking for ways to improve the finesse of industrial tools via his myriads of researches. He also shares some of his experiences on many platforms while writing on tool products.