Best Overload Relays of 2025

Harvey Wall Avatar
Harvey Wall
Last Updated: 29 Jan 2025

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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

sourcing map PTC Starter Relay and Overload Protector Cover #TOP 1
sourcing map PTC Starter Relay and Overload Protector
ftb score rating icon 9.8
sourcing map PTC Starter Relay and Overload Protector Cover #TOP 2
sourcing map PTC Starter Relay and Overload Protector
ftb score rating icon 9.7
sourcing map 4pcs PTC Starter Relay and Overload Protector Cover #TOP 3
sourcing map 4pcs PTC Starter Relay and Overload Protector
ftb score rating icon 9.5

Top 10 Overload Relays

#TOP 1

sourcing map PTC Starter Relay and Overload Protector

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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.

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

sourcing map PTC Starter Relay and Overload Protector

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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.

What We Like
Protects compressor from overheating
Suitable for various appliances
Easy to install and replace
Compact and versatile design
#TOP 3

sourcing map 4pcs PTC Starter Relay and Overload Protector

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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.

What We Like
Effective compressor protection
Versatile for multiple appliances
Easy installation process
Compact size fits various models
#TOP 4

Schneider Electric TeSys LRD Thermal Overload Relay

LRD10
White
4-6A
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.

What We Like
Protects against overloads
Modern design for machines
Convenient maintenance guide
Multiple international certifications
Easy installation
#TOP 5

sourcingmap 15 Ohm Start Relay and Protector

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sourcingmap 15 Ohm Start Relay and Protector Cover
sourcingmap Refrigerator Start Relay 15 Ohm 4 Pin + Compressor Thermal Overload Protector 1/6HP 125W

The sourcingmap Start Relay is designed to enhance the performance of your refrigerator. With a 15 Ohm 4 Pin Start Relay and a 1/6HP 125W Thermal Overload Protector, it ensures efficient operation. The compact dimensions make installation straightforward, fitting most brands easily. Additionally, it provides essential safety features, helping to prevent compressor damage by monitoring the power levels. This product is ideal for keeping your refrigerator running smoothly and reliably.

What We Like
Easy to install
Compact size
High compatibility
Ensures compressor safety
#TOP 6

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

LRD21
White
12-18A
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.

What We Like
Protects against overloads
Easy access to technical documents
Multiple international certifications
Quick installation process
#TOP 7

sourcingmap 15 Ohm 3 Pin Start Relay with Protector

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sourcingmap 15 Ohm 3 Pin Start Relay with Protector Cover
sourcingmap Refrigerator Start Relay 15 Ohm 3 Pin + Compressor Thermal Overload Protector

The sourcingmap Start Relay features a 15 Ohm 3 Pin design and includes a Thermal Overload Protector, ensuring your refrigerator operates efficiently. Its compact size makes it easy to install, fitting most brands perfectly. You can select the right components by checking the size and resistance, which helps maintain optimal performance. This product also includes a breakdown judgment feature, allowing you to easily identify if the relay or protector is malfunctioning, thereby saving you time and potential repair costs.

What We Like
Easy to install
Fits most brands
Compact size
Breakdown judgment feature
Efficient operation
#TOP 8

sourcingmap 33 Ohm Start Relay with Overload Protectors

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sourcingmap 33 Ohm Start Relay with Overload Protectors Cover
sourcingmap Refrigerator Start Relay 33 Ohm 3 Pin + Compressor Thermal Overload Protectors

The sourcingmap Start Relay is a reliable component designed to ensure smooth operation of your refrigerator. With its 33 Ohm 3 Pin configuration, it fits most brands easily, making installation straightforward for you. The thermal overload protector adds an extra layer of safety, helping to prevent damage from overheating. Its compact size means it won't take up much space, while the convenient breakdown judgment feature allows you to easily determine if it needs replacing, ensuring your appliance remains in good working order.

What We Like
Easy to install
Compact size
Reliable thermal protection
Compatible with most brands
Clear breakdown judgement
#TOP 9

YWBL-WH CPN NR2-25 Electric Thermal Relay

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YWBL-WH CPN NR2-25 Electric Thermal Relay Cover
CPN NR2-25 Electric Thermal Overload Relay 7A-10A 50-60hz, Relay

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.

What We Like
Protects against motor overload
Manual and automatic reset
Temperature compensation feature
Easy trip indication
Includes test and stop buttons
#TOP 10

sourcingmap 22 Ohm Start Relay and Thermal Protector

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sourcingmap 22 Ohm Start Relay and Thermal Protector Cover
sourcingmap Refrigerator Start Relay 22 Ohm 2 Pin + Compressor Thermal Overload Protector

The sourcingmap Start Relay features a 22 Ohm 2 Pin design and includes a thermal overload protector. This product is easy to install, making it suitable for most refrigerator brands. The total size of the relay ensures it fits well within your appliance, while the overload protector helps safeguard against overheating. By selecting the appropriate size and checking the compressor power, you can ensure optimal performance and longevity for your refrigeration system.

What We Like
Easy to install
Fits most brands
Protects against overheating
Compact size
Durable construction
Buying Guide Image

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 63 overload relay products and shortlisted 10 quality products. We collected and analyzed 3,967 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 £14.83.

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, Uxcell, YWBL-WH. The seller of top 1 product has received honest feedback from 20,030 consumers with an average rating of 4.8.

Written by
Harvey Wall Avatar

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.