Best Knife Switches of 2025
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Knife switches are a type of electrical switch that has been used for over a century in various applications. They are commonly found in electrical circuits where high power is required, such as in power distribution systems, industrial machinery, and laboratory experiments. A knife switch consists of a metal blade that can be manually rotated to make or break the electrical connection. They are reliable, durable, and easy to operate, making them a popular choice for many applications. Although they have been largely replaced by more modern switches, knife switches still have a place in certain industries and continue to be used by hobbyists and enthusiasts.
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 10 Knife Switches
TWTADE Disconnect Knife Switch 32A 220V 2 Pole Double Throw DPDT Power Disconnect Switch HK11-2P-32
The TWTADE Disconnect Switch is a reliable and durable double throw DPDT safety switch. With a rated current of 32A and a rated voltage of 0-380V, this switch is perfect for isolating power supply and turning on or off circuits. Its fail-safe circuit breaker feature ensures safety and peace of mind. The switch's compact size of 110 x 43 x 108 mm makes it easy to install and use. Available in red and green colors, this TWTADE Disconnect Switch is not only practical but also visually appealing. Whether you need to control power supply or create a fail-safe circuit, this switch is an excellent choice for any application.
Hmknana Knife Switch H-033
The Hmknana Knife Switch is a versatile and durable switch that is perfect for conducting experiments in physics laboratories. With its insulating handle, it ensures your personal safety while working with electrical connections. The screw type binding post allows for easy rotation and wiring, making it convenient to use. The plastic base is designed to be thickened, providing stability during experiments. This switch is not only safe and reliable but also offers a long service life. The Hmknana Knife Switch is a must-have tool for any physics enthusiast or student.
Baomain 3 Pole Double Throw Electric Brake Safety Knife Switch
The Baomain 3 Pole Double Throw Electric Brake Safety Knife Switch is a reliable and durable switch suitable for various applications. With its 3PDT (3 Pole Double Throw) design, this switch allows for easy and efficient switching between two different power sources. The yellow and black metal construction ensures durability and longevity. The switch has a power rating of 380V 100A, making it suitable for high-power applications. The installing hole diameter of 6.3mm allows for easy installation. With a compact size of 160 x 136 x 70mm, this knife switch is space-saving and can be easily integrated into existing systems. Overall, the Baomain Electric Brake Knife Switch is a versatile and high-quality switch that provides convenience and reliability.
Eisco Labs Knife Switch
This knife switch from Eisco Labs is a durable and reliable option for classroom use. It features a single pole and double throw design, and the poles and knives are made of brass, ensuring strong electrical connections. This switch falls under the category of knife switches.
Baomain Electric Brake Safety Knife Switch HS11F-100/48
The Baomain Electric Brake Safety Knife Switch is a 4 Pole Double Throw device with a rating of 380V 100A. The switch is easy to install with a 6.6mm hole diameter and 110 x 91mm hole distance. The switch size is approximately 220 x 170 x 110mm and weighs 976g.
AC 400V 200A Safety Knife Switch
This electric knife switch is a single pole, single throw (SPST) model that features a high voltage capacity of up to AC 400V and a current capacity of up to 200A, making it suitable for various applications. The switch has a compact size of 160 x 60 x 93mm (LWH) and a durable construction made of plastic and metal. Its yellow and black color and easy-to-install design make it a convenient choice for industrial use.
AXLIZER Double Pole Double Throw Electrical Switch
The AXLIZER Double Pole Double Throw Electrical Switch is a safe and durable teaching instrument made of hard plastic and high-quality pure copper. The switch provides stability and visualization of electrical principles, making it easy for students to learn about the principles of electricity and circuits. The switch has a screw-type binding post for easy wiring and is easy to reconfigure for classroom use. The knife switch is low voltage and low current for low voltage DC power supply, suitable for home school and physics laboratory experiments. The bakelite base isolates the current, and the switch blade of double pole double throw is suitable for hobby use.
YXQ AC 400V 200A Safety Knife Switch DPST
The YXQ AC 400V 200A Safety Knife Switch DPST, also known as the YXQ Safety Knife Switch, is a versatile and reliable electrical switch. With its double pole single throw (DPST) design, this switch allows for easy control of electrical circuits. Made from durable metal, it can handle power up to AC 400V 200A, making it suitable for a wide range of applications. The switch features an easy installation process with a 6.4mm hole diameter and a 137mm hole distance. The thread diameter for connecting cables is 7.7mm, ensuring secure connections. With its compact size of 160 x 115 x 100mm and lightweight design of 707g, it is convenient to use and transport. Whether you need to control power supply in industrial settings or residential applications, the YXQ AC 400V 200A Safety Knife Switch DPST is a reliable choice.
QWORK 63A 20V Knife Switch
The QWORK Knife Switch is a versatile power disconnect solution designed for both home and industrial applications. With a rated current of 63A and voltage capacity up to 380V, it ensures reliable operation for various electrical needs. Its durable construction features a double throw mechanism that maintains excellent contact even after repeated use, providing peace of mind. The large wiring holes allow for quick and secure connections, making installation hassle-free. This switch is ideal for safely managing power supply and circuit connections, enhancing your electrical safety.
tatoko SPST Knife Switch 10PCS
The tatoko Knife Switch is an ideal tool for classroom and laboratory experiments. With a maximum working voltage of 36V, it allows you to easily connect and disconnect electrical circuits. The knife-style design ensures a safe and clear operation, helping you visualize the switch’s function. Additionally, the secure screw-type binding posts provide reliable electrical connections, preventing any accidental disconnections. Measuring 7.5cm in length, this compact switch is perfect for various educational applications, making your experiments more efficient and straightforward.
Frequently Asked Questions (FAQs)
1. What is a knife switch used for?
A knife switch is a type of switch used to control the flow of electricity in a circuit. It consists of a metal lever, or knife, that can be lifted or inserted into a slot to open or close the circuit. It is commonly used in various applications to control the electrical current.
2. What is a knife switch that opens a circuit?
A knife switch that opens a circuit is a classic ON/OFF switch. It can be used to close or open a circuit by rotating the lever down or raising it up. This type of switch is often used in different settings, such as controlling machinery or gates.
3. Is a knife switch safe?
Knife switches can pose safety risks, especially when handling high currents. Open knife switches have been replaced by safety switches with metal housings and current-carrying contacts that can only be opened when the power is removed. This helps prevent fire or explosion hazards.
4. Why is it so important to operate knife switches quickly?
Operating knife switches quickly is important for two reasons. Firstly, it helps to extinguish any arc that may be present during the opening or closing of the switch. Secondly, some knife switches do not have arc extinguishing covers, so quick operation can help minimize the risk of loading operations.
5. Is a knife switch manually operated?
Yes, knife switches are manually operated. They are designed for easy and flexible operation, allowing them to be easily connected to the circuit. They often have self-cleaning blade contacts, making them suitable for use in environments with pollution or dirt.
6. Are knife switches rated for more than 1200 amps at 250 volts?
Knife switches rated for more than 1200 amps at 250 volts or over 1000 amps at 251 to 1000 volts should only be used as isolating switches and should not be opened under load. It is important to adhere to the proper ratings and guidelines to ensure safe and effective use of knife switches.
During our knife switch research, we found 24 knife switch products and shortlisted 10 quality products. We collected and analyzed 4,269 customer reviews through our big data system to write the knife switches list. We found that most customers choose knife switches with an average price of $12.83.
The knife switches are available for purchase. We have researched hundreds of brands and picked the top brands of knife switches, including TWTADE, Hmknana, Baomain, EISCO, YXQ. The seller of top 1 product has received honest feedback from 511 consumers with an average rating of 4.9.
Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.