---
product_id: 4822078
title: "8811006 Solid State Variable Speed AC Electric Motor Control, 2.5 Max amp, 115V, KBWC-13K"
brand: "kb electronics"
price: "€ 44.80"
currency: EUR
in_stock: true
reviews_count: 8
category: "Kb Electronics"
url: https://www.desertcart.be/products/4822078-8811006-solid-state-variable-speed-ac-electric-motor-control-2
store_origin: BE
region: Belgium
---

# 2.5 Max Amps Power UL & CSA Certified Safety Fits Standard 2"x4" Wall Box 8811006 Solid State Variable Speed AC Electric Motor Control, 2.5 Max amp, 115V, KBWC-13K

**Brand:** kb electronics
**Price:** € 44.80
**Availability:** ✅ In Stock

## Summary

> ⚙️ Master your airflow with precision and power — control that means business!

## Quick Answers

- **What is this?** 8811006 Solid State Variable Speed AC Electric Motor Control, 2.5 Max amp, 115V, KBWC-13K by kb electronics
- **How much does it cost?** € 44.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/4822078-8811006-solid-state-variable-speed-ac-electric-motor-control-2)

## Best For

- kb electronics enthusiasts

## Why This Product

- Trusted kb electronics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust Compatibility:** Optimized for shaded pole and PSC motors powering fans, blowers, and ventilators.
- • **Certified Reliability:** UL & CSA approvals guarantee safety and long-lasting performance you can trust.
- • **Energy-Smart Operation:** Control motor speed to reduce power consumption and extend motor life.
- • **Compact Wall-Mount Design:** Installs effortlessly in standard electrical boxes for a clean, professional setup.
- • **Infinite Variable Speed Control:** Seamlessly adjust motor speed for precise airflow and noise management.

## Overview

The KBWC-13K Solid State Variable Speed AC Motor Control delivers smooth, infinite speed adjustment for shaded pole and PSC motors up to 2.5 amps at 115V. Designed for easy installation in standard 2"x4" wall boxes, it’s UL and CSA certified for safety and reliability. Ideal for fans, blowers, and ventilators, this control enhances comfort and efficiency while reducing noise, making it a must-have upgrade for professional-grade HVAC and ventilation systems.

## Description

Control provides infinite variable speed for shaded pole and PSC motors. Max amps means that the rated motor name plate amperage can not exceed this rating or you will damage the control and motor. Motor must be run with sufficient torque to prevent stalling - A motor not turning will burn up Motor must have fan blade installed on shaft (direct drive) to cool motor. Not to be used with gear motors. Controls that have been installed are not returnable.

Review: High quality construction, simple design, easy to use and set up - This review is for the KBWC-13K solid state speed control. I purchased this controller with intent of modifying it so the fan of my Magic Heat unit would run slower and be less noisy when the woodstove fire was producing less heat. The Magic Heat uses a simple (on/off) thermostat controlled 1/200 hp single speed shaded pole fan motor to circulate heat into the room. So my next step after receiving the KBWC-13K was to disassemble it to see what I was working with. The attached photo illustrates the few components that are inside. Overall the components, assembly and soldering are of very good quality. The only oddity is the small trimmer potentiometer (black circular part with blue center located in middle front of the picture) which is wedged up against the larger control knob potentiometer leads. There's no real problem here; just not a typical component mounting. I suspect the trimmer is located in this manner to prevent heavy handed screwdriver users from damaging the trimmer. Overall I am very pleased with the construction/quality of this product. There are three minor design “features” to keep in mind with this speed controller given it was originally developed back in the 1960's. Most users probably won't notice these; but should be aware of them. The first requires understanding that the two potentiometers are set up in parallel. The circuit triggers on whichever potentiometer is set to a lower resistance. So, if the trimmer is set so the motor has a high minimum speed, then there's very little usable speed adjustment range from the control knob and vice versa. The second is that the circuit has control setting hysteresis. This can be observed if you dial the speed of a motor down to a very slow steady rpm and then disconnect the power to the circuit (as happens with the thermostat switch of the Magic Heat). When power is reapplied, the fan may struggle to start, if it does at all. If there was no hysteresis, the fan would spin back up to the original slow rpm setting. The third is the circuit's asymmetrical triggering of the triac. This can sometimes be heard as a repetitive, very low volume, loud-soft, HUM-hum-HUM-hum sound. This noise is often louder when working with old, poorly mounted, or cheaply made motors. I can usually identify this sound when I'm in an adjacent room where the low frequency of this noise comes through over the fan airflow noise. There's a ten page Teccor Electronics application note AN1003 on the web that provides a more technical understanding of this type of speed control. The entire controller operates at AC line voltages so disassembly and modification should only be done by a person educated/trained in AC power circuits/electronics. Here I'm suggesting an alternative use for the KBWC-13K; not a detailed modification process with essential safety considerations. The KBWC-13K potentiometers are configured as two-terminal components (center terminal, the “wiper”, is connected to one of the end terminals). This means I can easily replace the trimmer potentiometer with a two terminal negative temperature coefficient (NTC) thermistor. With a suitable NTC in place of the trimmer, the motor rpm will hold a steady slow speed at room temperature and increase the motor rpm with increasing temperatures up to the full motor speed at some desired high temperature. The control knob potentiometer is now used like the original trimmer to increase the minimum motor speed if it happens to be too slow at the desired low temperature. Another similar modification back in the 1970's/1980's was using a photocell in place of the trimmer which makes the fan speed up with increasing light levels. Keep in mind that these are low cost, simplistic controllers; the performance can vary significantly from one installation to another. After the modified controller was connected into the Magic Heat circuit, I decided to measure the fan current consumption. While the shaded pole fan was performing very well with the controller from minimum to maximum speed; measurements showed the fan was only 10% efficient at full speed and only slightly better at reduced speeds. Shaded pole motors under 1/15-1/20 hp are known to have very low efficiency which is what prompted me to test the current consumption. A Permanent Split Capacitor (PSC) motor usually has about double the efficiency of a similar hp shaded pole motor. So I modified the Magic Heat to use a PSC motor. However, the PSC motor was surprisingly noisy and sluggish when starting at low speed settings. An on-line search revealed that for a PSC motor, only the main (“run”) winding should be controlled by a phase type speed controller while the auxiliary (“start”; one with the capacitor) winding should bypass the speed control so it always has full AC power. The common two wire installation of the speed control has it wired in series with the motor so the motors' run and start windings are in parallel and powered by the controller simultaneously. This alternate approach makes the motor a 3-wire configuration, eliminating use of the built-in on/off switch of the speed controller (which I wasn't using anyway), and requires a separate on/off power switch (Magic Heat thermostat covers that). Having full voltage on the start winding, regardless of the speed controller setting on the run winding, provides full power for motor starting at all speed control settings. This modification reduces the slow speed operating noise (to a point) and increases motor efficiency at reduced speeds. In my installation, the 3-wire PSC motor configuration operates at a full speed efficiency of 33% and increases to a high of 53% at the minimum speed. Again, this is a modification that should only be performed by an electrician. Final note. If plan on buying 3 or more controllers; find a seller that reduces the selling price for buying multiple units vs a flat rate per unit. Sellers that adjust the built-in shipping costs according to the weight of your purchase may save you some money for multiple units. The single unit pricing of this desertcart seller is reasonable for a one or two unit purchase.
Review: Works well for a parts washer pump speed/flow control - I needed a way to control the speed/flow of the pump in a parts washer tank, and this fit the bill. Its a low wattage / low amp motor but even the lowest flow one I could find would still spray too hard. This motor control works great to vary the power to the motor as needed.

## Features

- Designed for Standard 2" x 4" Electrical Wall Box
- 2.5 Max amps 115 Volts; UL & CSA Approved
- Not to be used with Capacitor Start or Capacitor Run Motors
- Applications: Fans, Blowers, Fireplace Blowers, Attic Fans, Humidifiers, Ventilators

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000F9B712 |
| Best Sellers Rank | #32,341 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Electrical Motor Controls |
| Brand | KB ELECTRONICS |
| Brand Name | KB ELECTRONICS |
| Circuit Type | multi-way |
| Compatible Devices | Fans, Blowers, Fireplace Blowers, Attic Fans, Humidifiers, Ventilators |
| Connector Type | Screw |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Control Method | Touch |
| Control Type | Variable Speed |
| Current Rating | 2 Amps |
| Customer Reviews | 4.4 out of 5 stars 295 Reviews |
| Global Trade Identification Number | 00663001020516 |
| Item Weight | 4.54 g |
| Manufacturer | KB Electronics |
| Material Type | Plastic |
| Model | 8811006 |
| Mounting Type | Wall Mount |
| Number of Items | 1 |
| Operating Voltage | 115 Volts (AC) |
| Operation Mode | manual |
| Part Number | 8811006 |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specification Met | CSA, UL |
| Switch Type | Push Button |
| Terminal | Screw |
| UPC | 663001451662 663001020516 |
| Unit Count | 1.0 Count |
| Wattage | 287.5 watts |

## Product Details

- **Brand:** KB ELECTRONICS
- **Circuit Type:** multi-way
- **Connector Type:** Screw
- **Contact Type:** Normally Open
- **Current Rating:** 2 Amps
- **Material:** Plastic
- **Operating Voltage:** 115 Volts (AC)
- **Operation Mode:** manual
- **Switch Type:** Push Button
- **Terminal:** Screw

## Images

![8811006 Solid State Variable Speed AC Electric Motor Control, 2.5 Max amp, 115V, KBWC-13K - Image 1](https://m.media-amazon.com/images/I/61ltIO4xeYS.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Will a 1300 watt 3 amp motor be able to be run on this switch?**
A: amps=Watts/sin(45)/Volts
1300[W]/sin(45)/120[V]=15.32Amps

Got to remember to do the root-mean-square when it's AC

**Q: Have the 5 amp model hooked up to hair dryer with heater disabled. Using just fan motor. The unit does not work to control speed. Any suggestions?**
A: isolate all power sources, check wiring connections hot to motor controller hot to black power , motor controller red to motor, neutral to neutral ie white to white, green to green. if the red out of controller is to hot wire it will not work and may have blown the controller if connected wrong and energized

**Q: Will this controller work with Panasonic’s whisper quiet model tnx**
A: I was not able to fine infomation on your Panasonic Whisper quite model TNX.  
Would it be possible for you to email product infomation.

Please email to b.tognan@kbelectronics.net

Thank you,
Regards,

Bob Tognan

**Q: I have 2 hunter ceiling fans, wired in series.  the standard 3 speed lutron control from menards doesn't work (fans stall out).  what size/amperage?**
A: Assume you are asking how many amps your 2 fans are drawing.  Not much, but specs should be listed on fan instructions.  I ended up not using this motor control because of the humming noise it caused the fan motor to make.  Most people object to fan noise.  Controllers that do not make noise are very expensive, nearly equal to the cost of a good fan.  It would be ideal to use the speed control already in the fan if possible.  Just a thought.

## Customer Reviews

### ⭐⭐⭐⭐⭐ High quality construction, simple design, easy to use and set up
*by A***N on February 26, 2021*

This review is for the KBWC-13K solid state speed control. I purchased this controller with intent of modifying it so the fan of my Magic Heat unit would run slower and be less noisy when the woodstove fire was producing less heat. The Magic Heat uses a simple (on/off) thermostat controlled 1/200 hp single speed shaded pole fan motor to circulate heat into the room. So my next step after receiving the KBWC-13K was to disassemble it to see what I was working with. The attached photo illustrates the few components that are inside. Overall the components, assembly and soldering are of very good quality. The only oddity is the small trimmer potentiometer (black circular part with blue center located in middle front of the picture) which is wedged up against the larger control knob potentiometer leads. There's no real problem here; just not a typical component mounting. I suspect the trimmer is located in this manner to prevent heavy handed screwdriver users from damaging the trimmer. Overall I am very pleased with the construction/quality of this product. There are three minor design “features” to keep in mind with this speed controller given it was originally developed back in the 1960's. Most users probably won't notice these; but should be aware of them. The first requires understanding that the two potentiometers are set up in parallel. The circuit triggers on whichever potentiometer is set to a lower resistance. So, if the trimmer is set so the motor has a high minimum speed, then there's very little usable speed adjustment range from the control knob and vice versa. The second is that the circuit has control setting hysteresis. This can be observed if you dial the speed of a motor down to a very slow steady rpm and then disconnect the power to the circuit (as happens with the thermostat switch of the Magic Heat). When power is reapplied, the fan may struggle to start, if it does at all. If there was no hysteresis, the fan would spin back up to the original slow rpm setting. The third is the circuit's asymmetrical triggering of the triac. This can sometimes be heard as a repetitive, very low volume, loud-soft, HUM-hum-HUM-hum sound. This noise is often louder when working with old, poorly mounted, or cheaply made motors. I can usually identify this sound when I'm in an adjacent room where the low frequency of this noise comes through over the fan airflow noise. There's a ten page Teccor Electronics application note AN1003 on the web that provides a more technical understanding of this type of speed control. The entire controller operates at AC line voltages so disassembly and modification should only be done by a person educated/trained in AC power circuits/electronics. Here I'm suggesting an alternative use for the KBWC-13K; not a detailed modification process with essential safety considerations. The KBWC-13K potentiometers are configured as two-terminal components (center terminal, the “wiper”, is connected to one of the end terminals). This means I can easily replace the trimmer potentiometer with a two terminal negative temperature coefficient (NTC) thermistor. With a suitable NTC in place of the trimmer, the motor rpm will hold a steady slow speed at room temperature and increase the motor rpm with increasing temperatures up to the full motor speed at some desired high temperature. The control knob potentiometer is now used like the original trimmer to increase the minimum motor speed if it happens to be too slow at the desired low temperature. Another similar modification back in the 1970's/1980's was using a photocell in place of the trimmer which makes the fan speed up with increasing light levels. Keep in mind that these are low cost, simplistic controllers; the performance can vary significantly from one installation to another. After the modified controller was connected into the Magic Heat circuit, I decided to measure the fan current consumption. While the shaded pole fan was performing very well with the controller from minimum to maximum speed; measurements showed the fan was only 10% efficient at full speed and only slightly better at reduced speeds. Shaded pole motors under 1/15-1/20 hp are known to have very low efficiency which is what prompted me to test the current consumption. A Permanent Split Capacitor (PSC) motor usually has about double the efficiency of a similar hp shaded pole motor. So I modified the Magic Heat to use a PSC motor. However, the PSC motor was surprisingly noisy and sluggish when starting at low speed settings. An on-line search revealed that for a PSC motor, only the main (“run”) winding should be controlled by a phase type speed controller while the auxiliary (“start”; one with the capacitor) winding should bypass the speed control so it always has full AC power. The common two wire installation of the speed control has it wired in series with the motor so the motors' run and start windings are in parallel and powered by the controller simultaneously. This alternate approach makes the motor a 3-wire configuration, eliminating use of the built-in on/off switch of the speed controller (which I wasn't using anyway), and requires a separate on/off power switch (Magic Heat thermostat covers that). Having full voltage on the start winding, regardless of the speed controller setting on the run winding, provides full power for motor starting at all speed control settings. This modification reduces the slow speed operating noise (to a point) and increases motor efficiency at reduced speeds. In my installation, the 3-wire PSC motor configuration operates at a full speed efficiency of 33% and increases to a high of 53% at the minimum speed. Again, this is a modification that should only be performed by an electrician. Final note. If plan on buying 3 or more controllers; find a seller that reduces the selling price for buying multiple units vs a flat rate per unit. Sellers that adjust the built-in shipping costs according to the weight of your purchase may save you some money for multiple units. The single unit pricing of this Amazon seller is reasonable for a one or two unit purchase.

### ⭐⭐⭐⭐⭐ Works well for a parts washer pump speed/flow control
*by E***S on April 25, 2026*

I needed a way to control the speed/flow of the pump in a parts washer tank, and this fit the bill. Its a low wattage / low amp motor but even the lowest flow one I could find would still spray too hard. This motor control works great to vary the power to the motor as needed.

### ⭐⭐⭐⭐ Works as described - satisfied.
*by Z***N on April 14, 2015*

Works as described. This was purchased to permit speed variations for a fireplace insert fan as the one we had before was not designed for that and was hard to use and difficult to have a nice range of speeds over the turn of the knob. I have installed similar devices so this was easy for me and really should be for anyone. The task of getting new outlets and running wires, etc. was a bit of a task as I needed to wire this in line to a new outlet for the fireplace fan to plug into - but that has nothing to do with the item itself. It has a nice range of gradual speeds for the fireplace insert fan and a nice "click" for the off position. Nothing really to complain about yet.

## Frequently Bought Together

- KB Electronics 8811006 Solid State Variable Speed AC Electric Motor Control, 2.5 Max amp, 115V, KBWC-13K
- Maxx Air Powerful Industrial Exhaust and Ventilation Fan, 1400 CFM, UL Listed, Ventilation and Cooling for Greenhouses, Kitchens, Restaurants, Rust Resistant Steel Housing (14 Inch)

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-06-19*