The Best Soft Start Relay of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best Soft Start Relay of 2025. Check our ranking below.
2,847 Reviews Scanned
Rank No. #1
2.7kw 110V 25A 60Hz Soft Starter, Soft Start Module, Soft Start Relay for Table Saw, Disk Saw, Grooving Machines, Angle Grinders, Cutting Machines etc, Externally Mounted
- What is Soft Starter: A soft starter is an additional device that can be added to electric motor that will allow the motor to use a different startup method; The purpose of this device is to reduce the strain put on the motor during the power-up phase of a motor
- The Reason You Need a Soft Start: Soft start can reduce inrush current spikes at the motor starts moment, so as to reduce the risk of electric shock and fire, extend the life of the motor and effectively protect the operator's safety
- Three Compound Starting Modes: The soft start relay is designed with 3 modes: current-limited starting mode, voltage ramp starting mode, smooth and stable starting mode
- Good Size for Installation: The soft start module adopts imported chips and its size is designed according to the external installation requirements.
- Wide Range of Applications: Our soft start is mainly used on series motors, that is, motors with carbon brushes, for example, portable power tools like table saws, disk saw, grooving machines, angle grinders and so on; Heavy-duty starting motors are not recommended, such as air conditioners, air pumps, water pumps and other appliances
Rank No. #2
1.2kw 110V 60Hz 20A Soft Start Module, Soft Start Relay for Table Saws Circular Saws Slotting Machines Angle Grinders Electric Tools with Brush Motor, Internally Mounted Soft Starter
- Reduced Inrush Current: The soft start relay gradually increases the voltage provided to the load, reducing the inrush current during motor startup, reducing the risk of electric shock and fire, effectively protecting sensitive electronic components and extending equipment life
- Compatibility: The maximum current limit of the 1.2KW soft start relay is 20A, which can be integrated into a wide range of applications and is suitable for electric tools such as circular saws and slotting machines (motors with carbon brushes). Note: The configuration parameters should be larger rather than smaller. Other motors, such as capacitive motors, should not be used
- Durability and Heat Dissipation: The soft starter is equipped with a heat dissipation aluminum shell, which has excellent heat dissipation and corrosion resistance, and can withstand various harsh weather conditions, improving its service life and performance. Built in silicone copper core leads, sealed with adhesive, with strong conductivity, maintaining stability and reliability during motor operation
- Enhanced Safety: Soft start reduces the possibility of equipment damage and electrical faults caused by high inrush currents, ensuring effective operation of the equipment, preventing the risk of voltage related issues, and creating a safer working environment
- Smooth Operation: The soft start relay provides smooth and controllable acceleration for motors and other equipment, thereby improving the overall performance of the system and reducing wear and tear
Rank No. #3
125/250V 24A Soft Start Module with Pre-Wiring, Soft Start Switch, Soft Start Relay, Power Tool Accessory for Table Saws, Circular Saws, Angle Grinders, Cut-Off Machines
- 【Smooth Start-Up】: Our soft start feature eliminates abrupt starts, allowing your machine to gradually reach full speed within a short time (approximately 1-2 seconds) after powering on. This gentle acceleration effectively protects bearings and gears, extending the lifespan of your tools.
- 【Reduced Inrush Current】: The soft start module effectively minimizes inrush current during startup, ensuring a seamless power-on process and preventing fuse blowouts when turning on your tools.
- 【Plug and Play】: With a compact design, installation is effortless. The module seamlessly integrates into your power tool housing. Simply plug it in for use—no complex wiring required.
- 【Durable and Reliable】: Our soft start module is built to last, featuring an electrical lifespan of 5E4 cycles. It ensures long-term durability and reliability, providing consistent and stable performance support for your power tools.
- 【Wide Application】: This soft start module is designed for power tools equipped with brushed motors, compatible with devices operating at 125/250V and 50/60Hz. Ideal for table saws, circular saws, routers, angle grinders, cutting machines, and more.
Rank No. #4
120V 40A Soft Start Module, with Aluminum Block, Soft Start Switch, Soft Start Relay, Power Tool Accessory for Table Saws, Circular Saws, Angle Grinders, Cut-Off Machines
- 【Smooth Start-Up】: The soft start technology ensures a gradual ramp-up to full speed (within 1-2 seconds), eliminating sudden jerks. This protects motor bearings, gears, and internal components, significantly extending your tool's lifespan.
- 【Reduced Inrush Current】: The soft start module effectively minimizes inrush current during startup, ensuring a seamless power-on process and preventing fuse blowouts when turning on your tools.
- 【Durable and Reliable】:The integrated aluminum shell improves heat dissipation performance, ensuring stable operation even under heavy loads, and guaranteeing long-term durability and reliability.
- 【Plug and Play】: Compact and user-friendly design allows for quick integration into your power tool housing—no complex wiring needed. Simply plug it in for use.
- 【Wide Application】: This soft start module is designed for power tools equipped with brushed motors, compatible with devices operating at 120V and 60Hz. Ideal for table saws, circular saws, routers, angle grinders, cutting machines, and more.
Rank No. #5
2.0kw 110V 18A 60Hz Soft Starter, Soft Start Module, Soft Start Relay for Table Saw, Disk Saw, Grooving Machines, Angle Grinders, Cutting Machines etc, Externally Mounted
- What is Soft Starter: A soft starter is an additional device that can be added to electric motor that will allow the motor to use a different startup method; The purpose of this device is to reduce the strain put on the motor during the power-up phase of a motor
- The Reason You Need a Soft Start: Soft start can reduce inrush current spikes at the motor starts moment, so as to reduce the risk of electric shock and fire, extend the life of the motor and effectively protect the operator's safety
- Three Compound Starting Modes: The soft start relay is designed with 3 modes: current-limited starting mode, voltage ramp starting mode, smooth and stable starting mode
- Good Size for Installation: The soft start module adopts imported chips and its size is designed according to the external installation requirements.
- Wide Range of Applications: Our soft start is mainly used on series motors, that is, motors with carbon brushes, for example, portable power tools like table saws, disk saw, grooving machines, angle grinders and so on; Heavy-duty starting motors are not recommended, such as air conditioners, air pumps, water pumps and other appliances
Rank No. #6
120V 24A Soft Start Module, with Aluminum Block, Soft Start Switch, Soft Start Relay, Power Tool Accessory for Table Saws, Circular Saws, Angle Grinders, Cut-Off Machines
- 【Smooth Start-Up】: The soft start technology ensures a gradual ramp-up to full speed (within 1-2 seconds), eliminating sudden jerks. This protects motor bearings, gears, and internal components, significantly extending your tool's lifespan.
- 【Reduced Inrush Current】: The soft start module effectively minimizes inrush current during startup, ensuring a seamless power-on process and preventing fuse blowouts when turning on your tools.
- 【Durable and Reliable】:The integrated aluminum shell improves heat dissipation performance, ensuring stable operation even under heavy loads, and guaranteeing long-term durability and reliability.
- 【Plug and Play】: Compact and user-friendly design allows for quick integration into your power tool housing—no complex wiring needed. Simply plug it in for use.
- 【Wide Application】: This soft start module is designed for power tools equipped with brushed motors, compatible with devices operating at 120V and 60Hz. Ideal for table saws, circular saws, routers, angle grinders, cutting machines, and more.
Rank No. #7
TIKSCIENCE 24A 2kw 110V 60Hz Soft Starter Module Fit for Table Saw, Disk Saw, Grooving Machines, Angle Grinders, Cutting Machines etc, Externally Mounted Soft Start Relay
- Safety Protection: Tnclusion of a soft starter in the motor significantly reduces the risk of electrical shock and fire hazards. Minimizes sudden current spikes during motor startup, ensuring the safety of both operators and electrical equipment. Additionally, it extends the lifespan of the motor, promoting long-term safety and efficiency
- Multiple Startup Modes: Soft-start relay offers 3 distinct startup modes tailored to various work requirements. These modes include the current-limited startup, voltage ramp startup, and smooth and stable startup. The soft starter can automatically adapt to the specific needs of your equipment, enhancing versatility and performance
- Wide Adaptability: 24A 2kw 110V 60Hz soft starter is fit for brush motors with carbon brushes, table saws, circular saws, slotting machines, angle grinders, cutting machines and other electric tools, not fit for other motors, such as capacitive motors
- Premium Materials: Crafted with a durable heat-dissipating aluminum shell and high-quality silicone copper core leads, our soft start module guarantees efficient heat dissipation and superior conductivity, this not only extends the product's service life but also ensures stable current flow, improving overall performance
- Easy Installation: Product is easy to install, just connect the wiring harness, when selecting the soft starter, it is recommended that the configuration should be greater than the power of electric tools, and consider the placement of the original motor soft starter, the product is not suitable for full-load operation, and it is recommended that the continuous operation time should not exceed 30 minutes
SaleRank No. #8
ZJchao 30A 6600W Soft Start Module, PCB Oversized Relay Thermistor 10D 20 Defend Machine Excessive Starting Current AC 110V-250V High End Voice Frequency Power Input for High Power Devices Requiring
- [Oversized Relay Thermistor 10d 20] 30A 6600W Soft Start Module Utilizes a 30a pure copper foot relay and 10d 20 thermistor to effectively protect the machine from excessive starting current.
- Pcb Material] This soft start board made of pcb material, ensuring long-term stability and durability without deformation, suitable for machines up to 6600w.
- [Power Supply Voltage Adaptation] This soft start module works with ac 110v to 250v, with a compact size and easy installation, suitable for various applications including high-end voice frequency power input.
- [Versatile Applications] This soft start relay is ideal for high-power devices requiring a soft start module, providing performance and peace of mind.
- [No Auxiliary Power Needed] The soft start for power amps is requires only two terminals for power input and output load, making it easy to use without the need for an extra power supply.
Rank No. #9
2PCS Soft Start Module Softstart, Soft Start Module Softstart Replacement for Maschinen Electric Tool 125/250V To 24A, Electric Tools Accessories
- 【Soft Start Module】By installing the soft start module, the machine no longer starts up so jerkily, but only reaches full speed a short time after switching on (approx. 1-2 seconds). The motor is thus significantly less stressed when switched on. This protects the bearings/gears and extends the life of the moving parts.
- 【Reduce Starting Current】The starting current is reduced by installing the starting module and the machine starts up smoothly. This usually prevents the fuse from blowing when it is switched on. Due to the small design, the module can be easily accommodated in almost any machine or power tool within the housing.
- 【Wide Compatibility】The soft start module is suitable for motors with a brushed motor (with carbon brushes). With a voltage of 125/250V and frequency of 50/60HZ, it can handle current up to 24A. It is compatible with various electric tools and machines.
- 【and Reliable】Made with high-quality materials, this soft start module has an electric life of 5E4, ensuring long-lasting performance. The black silver color adds a sleek and professional touch to your equipment.
- 【Convenient Package】The package includes 2 soft start modules, providing you with a backup or the option to install them in multiple machines. Enjoy the benefits of smooth start-up and increased motor lifespan with this easy-to-use module.
SaleRank No. #10
30A 6600W Soft Start Module, AC 100V‑250V, Suitable for Class A Amplifier, High Power Appliances
- 30A: This board uses oversized current (30A) pure copper foot relay and oversized thermistor 10D 20 to effectively defend the machine from excessive starting current.
- AC 100V‑250V: Power supply voltage adaptation range of AC 110V to 250V, small and fine, simple installation.
- Scope of Application: Start board is suitable for high end voice frequency power input, or other large start up current machine applications. Use suitable for power up to 6600W.
- Simple This board does not require an auxiliary power supply, only two terminals, one for power input (before you can connect a switch control), and one for output load, easy to use.
- PCB Material: Start board is made of PCB material, long time use without deformation, thus ensuring long term stability.
Last update on 2026-01-20 / Affiliate links / Images from Amazon Product Advertising API
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- Brand Value: Every brand of Soft Start Relay has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
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