Display type | LED |
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Manufacturer | QUHUAMAO_US |
Batteries Required | No |
Included components | 1×AC Motor Speed Controller |

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AC Motor Speed Controller, 110-120V 15A 4000W Variable Speed Controller Regulator, Precise Safe Electronic Fan Variable Speed Adjuster with Overload Protection Switch, Line Length: 39.3"
Purchase options and add-ons
Colour | Black |
Brand | Tzdxfgl |
Voltage | 1.2E+2 Volts (AC) |
Product Dimensions | 99.8L x 6.5W x 6.5H Centimetres |
Material | iron |
About this item
- 【Detailed Parameters】This AC Motor Speed Controller device has an input voltage range of 110-120V, a rated current of 9A, and a maximum current capacity of 15A. It can handle a maximum resistive load of 4000W and an inductive load of 1500W.
- 【15A Overload Protection Switch】Equipped with a 15A overload protection switch, this variable speed controller device automatically cuts off the power supply when the current exceeds 15A. This feature ensures the safety of both the equipment and the users. Additionally, the flame retardant casing provides an extra layer of protection.
- 【Convenient Monitoring】With a back clip, this motor speed controller device can be easily attached to a belt for convenient access while working. The knob allows for precise voltage control, and the LED voltage display makes it easy to monitor the current voltage.
- 【Standard Socket】The bottom of this motor speed controller regulator is equipped with a standard socket that is compatible with Type A and Type B plugs commonly used in the US.
- 【Wide Range of Applications】Our AC motor speed controller is suitable for various applications, including small motors, fans, soldering irons, and other inductive load equipment. It can also be used with resistive loads such as kettles and electric heaters. Please note that this device is not compatible with products that have built-in circuit boards and electronic components, such as induction cookers, energy-saving lamps, and brushless synchronous motors.
- 【Dedicated After-Sales Support】If you have any questions or concerns, please contact us, and our dedicated service team will provide you with professional and satisfactory assistance.
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Product Description

TZDXFGL AC Electric Motor Speed Controller
TZDXFGL features an overload protection switch, a 3-bit digital tube voltage display screen, and a precise adjustable digital encoder, ensuring the safety and ease of use of this controller.


15A OVERLOAD PROTECTION SWITCH
- Equipped with a 15A overload protection switch, this variable speed controller device automatically cuts off the power supply when the current exceeds 15A. It replaces traditional boat-shaped switches and fuses. Recommeded Working Current: within 10 amps
PRECISION VOLTAGE ADJUSTMENT KNOB
- The knob allows for precise voltage control, and the LED voltage display makes it easy to monitor the current voltage. Offering high accuracy and excellent stability. The fan speed controller adopts stepless speed regulation and easily shifts gears according to actual conditions so that more appliances can be applied and easily controlled
TOOL KIT HANGING HOOK
- With a back clip, this motor speed controller device can be easily attached to a belt for convenient access while working. Designed to facilitate the use of angle grinders, our tool kit hanging hook allows for easy attachment of tool bags. Its unique design ensures enhanced safety and practicality.
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3-GEAR STEPLESS VARIABLE SPEED KNOB:
- Black — 0~40% — Low;Green— 41~80% — Mid;Red — 81~100% — High
SWITCH INDICATOR LIGHT
- The indicator will light up when the electricity is on, The Light shows you the controller is in working condition directly
STANDARD SOCKET:
- There is a standard socket on the bottom of the device, which is compatible with type A and type B plugs commonly used in the United States.
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Precautions & Instructions:
- Power and Voltage Range: Please ensure that the machine is operated within the specified rated power and voltage range. It is designed to be used with AC grid power only.
- Compatibility Note: This voltage regulator is not compatible with soft start voltage regulators and inductive transformers.
- Safety Precautions: It is normal for the machine to generate slight heat during operation. Use the AC Motor Speed Controller in a dry and well-ventilated environment.
- Proper Voltage Measurement: When the machine is not in use, the measured output voltage is virtual. To obtain accurate output voltage measurement, connect a load of at least 20W before adjusting the voltage.
- Power Limits for Different Loads: The 4000W power limit is for resistive load equipment. For inductive load equipment, such as series motors, the power should be limited to 1/3 of the resistive load power. Note that this device is not compatible with products containing circuit boards and electronic components, such as induction cookers, energy-saving lamps, and brushless synchronous motors.
- Flame-retardant Plastic Shell: This product has a flame-retardant plastic shell and must be properly grounded. Ensure that the power outlet is grounded for safe operation.

Parts List:
1×AC Motor Speed Controller
Detailed description:
Product Name: AC Motor Speed Controller
Material: ABS
Size: 12×6.5×5.5cm/4.72*2.55*2.16inch
Line length: 1m/39.3inch
Input voltage range: 110-120V
Maximum current capacity: 15A
Rated current: 9A
Support a maximum resistive load of 4000W and an inductive load of 1500W
Plug Standard: US
Color: Black
Notes:
Products with built-in circuit boards and electronic components cannot be used, such as induction cookers, energy-saving lamps, and brushless synchronous motors.
Product information
Technical Details
Additional Information
ASIN | B0CM6H43MD |
---|---|
Customer Reviews |
3.7 out of 5 stars |
鶹 Rank |
|
Date First Available | Oct. 31 2023 |
Manufacturer | QUHUAMAO_US |
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This Item TzdxfglAC Motor Speed Controller, 110-120V 15A 4000W Variable Speed Controller Regulator, Precise Safe Electronic Fan Variable Speed Adjuster with Overload Protection Switch, Line Length: 39.3" | Recommendations | ||||
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Price | $37.99$37.99 | -22%$35.99$35.99 Was: $45.99 | -7%$23.33$23.33 Was: $24.99 | $39.99$39.99 | $49.50$49.50 |
Delivery | Get it by Monday, Jul 21 | FREE Delivery | Get it Aug 7 - 27 | FREE Delivery | Get it by Monday, Jul 21 |
Customer ratings | |||||
Sold by | QUHUAMAO | Jiangsu Liangxu Intelligent Technology Co Ltd | RoystonSariaLowell-CA | JYShop | Inkbird Tech |
colour | Black | Black | Black | Black | Black |
brand | Tzdxfgl | L&Z | matell | ZOWZEA | Inkbird |
voltage | 120 volts of alternating current | 220 volts of alternating current | 60 volts of direct current | 110 volts of alternating current | 110 volts of alternating current |
material | iron | Metal | Copper | tungsten | Plastic |
weight | — | 1.08 pounds | 233 grams | 1.07 pounds | — |
Brands in this category on 鶹
Customer reviews
Customers say
Customers like the functionality, quality, and speed control of the controller. They mention it works well for adjusting the speed on the overhead fan, slows down their die grinders, and is a good product.
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Customers like the functionality of the controller. They mention it works well for adjusting the speed on the overhead fan and slowing down their die grinders. However, some customers have reported that the display still works, but the power output doesn't work.
"Works well" Read more
"Works great and decent value" Read more
"Excellent item, works like a charm! Much better than other types I have had. Allows very fine adjustments to be made." Read more
"Worked perfectly to slow down my die grinder." Read more
Customers are satisfied with the quality of the controller. They mention it looks decent and is a good product.
"Excellent item, works like a charm! Much better than other types I have had. Allows very fine adjustments to be made." Read more
"Haven’t used it yet. It did come fast and looks like it has decent quality." Read more
"Good quality..." Read more
"Good product..." Read more
Customers like the speed control of the product. They mention it control the high-speed grinder nicely and reduces speed flawlessly.
"I used it on my exhaust ceiling fan. reduces speed, flawlessly, and works well great purchase happy with it." Read more
"Controls high speed grinder nicely...." Read more
"Variable speed controller..." Read more
Reviews with images

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Top reviews from Canada
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- Reviewed in Canada on March 2, 2025Verified PurchaseExcellent item, works like a charm! Much better than other types I have had. Allows very fine adjustments to be made.
- Reviewed in Canada on April 15, 2025Verified PurchaseWorked perfectly to slow down my die grinder.
- Reviewed in Canada on May 2, 2025Verified PurchaseDisplay still worked but power output did not. Motor it was powering was 8amp so not a matter of overload, poor assembly or rough delivery
- Reviewed in Canada on February 6, 2025Verified PurchaseWorks well
- Reviewed in Canada on July 19, 2024Verified Purchaseworks as advertised; with things like these it's the long haul that tells the story
- Reviewed in Canada on September 11, 2024Verified Purchaseworks good
- Reviewed in Canada on April 9, 2025Verified PurchaseWorks great and decent value
- Reviewed in Canada on April 6, 2025Verified PurchaseThis unit does not slow down a 6rpm motor. Item looks good but is lacking in actually doing what is designed to do.
Top reviews from other countries
- BilliamReviewed in the United States on May 5, 2025
5.0 out of 5 stars Works great, great voltage range, led display
Verified PurchaseI use this unit to control the speed of my evaporative cooler. My cooler only has 2 speeds, and the lowest setting is not slow enough for very low air flow for overnight operation, or when I want a "whisper quiet" operation.
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BenitesReviewed in the United States on June 3, 2025
3.0 out of 5 stars Tiene un rango muy limitado de control
Verified PurchaseEste dispositivo no comienza a dar velocidad sino cuando la perilla va por la mitad de su recorrido y se mueve hasta el final. No es muy preciso ni gradual. Pero cumple su función siempre y cuando no necesites un rango más amplio y suave de control de velocidad.
- 鶹 CustomerReviewed in the United States on April 23, 2025
5.0 out of 5 stars Versatile variable voltage regulator.
Verified PurchaseVery nice works well with my electric drill. It also works with my one speed grinder which according to AI generative it is not supposed to because its brushless. I'm not sure why that would make any difference but it doesn't. Very handy item.