Common Question Answer Of Push Button Switch

1.How does a push button switch work?

Push button switch is a small switching device used to close or disconnect control circuits to issue instructions or program control. It consists of an actuator, a main body and a contact point.

Contacts are divided into constant open contacts and constant closed contacts. When you press the actuator, the spring moves, the contact opens or closes, and it completes the current loop or circuit break.

The main body of the push button switch is made of non-conductive plastic, the actuator is made of metal or plastic, and the contacts are made of copper. In order to keep good electrical conductivity at lower voltage and small current, a layer of gold or silver will be coated on the surface of copper contacts.  Extended learning: (What is the internal structure diagram of the push button switch?)

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2.What are the types of push button switches?

push button switch are classified into maintained push button switch and momentary push button switch according to the reset mode of operation mechanism.  It is also classified into plastic push button and metal push button according to the main body material.

3.What is momentary push button switch?

A type of push button switch usually in the form of a push button, that can’t be latched the operation mechanism in its set position. Momentary push button switches may be normally open or normally closed. A normally open switch doesn’t make contacts contact until and unless it is held down. A normally closed push button switch is always making contacts contact until the button is pushed.

LED push button switch
19mm push button switch/22mm push button switch/25mm push button switch

4.What is maintained push button switch?

A type of switch usually in the form of a push button, that can be latched the operation mechanism in its set position when you press the operation mechanism. Maintained switches may be normally open or normally closed. A normally open switch doesn’t make contacts contact until and unless it is held down.

5.What are the 4 types of switches?

In the electrical control circuit, common four types of switches are SPST, SPDT, DPST and DPDT push button switch. Extended learning: (What are the commonly used electrical components in the distribution cabinet?)

6.What is SPST push button switch?

SPST means a Single Pole Single Throw switch is a push button switch that only has a single input and can connect only to one output. This also means it only has one input terminal and only one output terminal. A Single Pole Single Throw push button switch serves in circuits as on-off switches. When the push button switch is closed, the circuit is on. The two terminals are either connected together or disconnected from each other. For example, a light switch.

Another common switch-type is the SPDT. SPDT have one common pin and two pins which vie for connection to the common. SPDT are very great for selecting between two power sources, swapping inputs, or whatever it is you do with two circuits trying to go one place. Most simple slide switches are of the SPDT variety. Actually SPDT can be made into an SPST by just leaving one of the switch terminals unconnected

7.What is the difference between SPST and DPDT push button switch?

DPDT switch is basically two SPDT switches, which can control two separate circuits, but are always switched together by a single actuator.

8.What is the difference between SPST, SPDT, DPST and DPDT switch?

SPST is a basic on/off switch that can turn a single electrical circuit on or off. A SPST switch has one input terminal and one output terminal.

A SPDT push button switch one input circuit to one of two output circuits. The type of switch is sometimes called an A/B switch because it lets you choose between two output circuits, called A and B. A SPDT switch has one input terminals and two output terminals that is A and B outputs.

A DPST switch turns on or turns off two circuits. A DPST switch has two inputs terminals and two outputs terminals. The on/off state of the two circuits is controlled synchronously.

A DPDT push button switch can control two separate electrical circuits, connecting each of two inputs to one of two outputs. So a DPDT switch has six terminals, include two inputs, two A outputs and two B outputs.

  1. What does a double pole switch do?

A double-poles switch is mechanically operated by the same lever or actuator, but that can control two electrical circuits. The double-poles switch is commonly used in industrial applications but can be found in some house applications. Like the single-pole switch, a double-poles switch has on/off markings and controls a device or equipment from one location. The main difference is that a double-pole switch has four brass terminals, instead of two. Double-poles switches are commonly rated for 30 amps, compared to 15 or 20 amps with standard switches. This allows the switches to control power feeding higher-demand appliances, for example machinery motors.

  1. What is the difference between single pole and double poles switches?

A switch pole refers to the number of separate circuits that the switch controls. A single-pole switch controls just one circuit. A double-pole switch controls two separate circuits. A double-pole switch is like two separate single-pole switches that are mechanically operated by the same lever or actuator. In summary, one pole can control one electrical circuit and two poles can control two electrical circuit.

  1. What equipment can the button be used on?

The metal button switch is of superior quality. The button has high-strength and anti-destructive performance. It is not only beautiful and elegant, but also has the advantages of multiple types, multiple specifications, and multiple uses. It meets the different needs of customers in various industries and is widely used Used in key surface control systems of various industrial cabinets, household appliances and other industries. The purpose of the switch is not only the switch of the light bulb in the home, but also the switch of other things, especially the switch of the computer and mobile phone. If these things are only practical and unsightly, they will definitely not be welcomed by everyone.

Commonly used parts in the home, these devices will also have metal switches on them, but its area will be much smaller. With the gradual change of people’s pursuits, now the old things are no longer practical, and more and more things are changing, because what we need to do is to ensure that the needs of consumers can be met, so now metal button switches are no longer just To be able to ensure practicality, but also need to ensure aesthetics.

  1. What are the advantages of metal push button switches in application?

There are many aspects of the metal button switch that need to be paid attention to when it is applied, because it involves more safety and content, and we also need to pay special attention to this application. When using it, it is very dangerous to avoid touching it with water on your hands. What are the other aspects of its role in application? We can also understand it from these aspects.

The first is that the consistency of its conduction angle can be very good; the second is that there will be no flashing phenomenon when it is turned on, and users can rest assured; and the other is for environmental protection and transportation. , And will not cause environmental pollution during use, which is a very good point. For its application advantages, there are these aspects. If users want to know more about its application problems, they can come and consult our technical staff.

  1. What material is stainless steel used for making metal buttons?

For food-related machinery or appliances, please use 304 or 316 stainless steel

Non-food machinery or appliances can be made of stainless steel with lower cost, such as 302.

Let me start with 304 stainless steel 304 is the most common stainless steel. Many kettles and tea strainers are made of this material. 304 stainless steel has a density of 7.93 g/cm3 and a high temperature resistance of 800 ℃, which is widely used in the food and medical industries. It is called food grade stainless steel, so the safety performance of 304 stainless steel is still very good.

In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 18% chromium and more than 8% nickel. 304 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard.

Besides, 316 stainless steel 316 stainless steel is a kind of stainless steel. Due to the addition of Mo, its corrosion resistance and high temperature strength have been greatly improved. The high temperature resistance can reach 1200-1300 degrees, and it can be used under harsh conditions.

316 stainless steel is also the main user of food industry and surgical equipment. Another feature of 316 stainless steel is that there is basically no phenomenon of thermal expansion and contraction.

Both 304 and 316 stainless steel are food-grade stainless steels, and both have certain safety performance. However, the corrosion resistance and high temperature resistance of 316 stainless steel are better than 304 stainless steel. Therefore, in some choices, you can choose 316 stainless steel.

Performance difference: Due to the different content of chromium and nickel bai and the different du of carbon content, 304 stainless steel pipe is a little softer than 201 stainless steel pipe, and 304 stainless steel has better corrosion resistance.

Application difference: 201 stainless steel is mainly used in dry areas and decorative areas where quality requirements are not strict. 304 stainless steel can be used in bathrooms, kitchens and coastal wet areas.

We are a metal button manufacturer with many experienced technicians who are very knowledgeable and professional about push button buttons.

Over the years, we have been constantly developing and improving based on customer feedback problems, and constantly improving our own requirements, just to be able to provide more excellent push button switches to customers who need them, and to make these push button switches available to customers.

Can exert one’s own strength on one’s own finished products. We have also solved many problems with push button switches, so that we can solve problems in time when we find them, and provide customers with multiple sets of solutions to solve problems from the perspective of customers.

We have also gained affirmation and praise from our customers. We still maintain a learning attitude. We still have a lot to learn about push button switches. We hope to grow with our customers. If you have any questions about this, please contact us in time.

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FILN company introduction

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If you have any questions, please feel free to contact us.

Filn is an innovative industrial and trading company integrating r&d, production and sales. The company was founded in 1998 and has 21 years of history. Now the company has three factories and one trading company.

FILN produces indicator lights, button switches, boat switches, guitar switches, touch control system switches, waterproof microswitches and other products.


FILN is the world’s most complete indicator lamp category of a manufacturing company, but also China’s only one has a small indicator lamp UL certificate mainland manufacturers.

In 2017, he started to design and develop guitar switch products, and in 2018, he completed the design of the new guitar switch with lights. He also participated in the electronics show in Thailand and the electronics show in Brazil.

In 2018, I obtained the indicator light UL certification in the United States and CCC quality certification in China. At the same time, I participated in exhibitions in Singapore, the United States and Germany.

In 2019, a research and development center was set up in shenzhen to develop touch control system switches, and the switch laboratory was established after obtaining the UL certificate for buttons and UL certificate for ship type. At the same time, the company participated in the electronic exhibition in Brazil and the electronic exhibition in Hong Kong.

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17/10/2020     Alan