Reputed SPDT Push Button Switch Supplier

Within Langir’s anti-vandal switch series, our L16, L19A, and high-current vandal-resistant push button switches meet the SPDT specification.

Typically, these switches have four to six pin terminals. The positive and negative pin terminals are for LED connection. The remaining four pin terminals allow connection to common, NO1, and NC1.

Accessories

We offer two wiring solutions to save your time, allowing you to focus more on the market. One option is a connector with pre-attached wires of varying lengths—simply plug in or pull out. These can also be sold separately to your customers. The other option: inform us of your desired wire length and AWG, and we will solder them with heat-shrink tubing.

Connecting with Wires

Langir SPDT push button switches with dot or ring illumination include six standard LED colors. You may choose red, green, yellow, orange, white, or blue as single colors. Moreover, bi-color and tri-color options are available. For example, one of our German customers prefers white LEDs for our L19M series installed in door access panels.

Langir SPDT button switches can be applied in various situations. For instance, when you walk down the street and want a drink from a vending kiosk, you will see and press this push button switch to receive your beverage. In China, when withdrawing cash from an ATM, you will also find an SPDT pushbutton there.

With over 16 years of experience in this field, we have gained extensive expertise to help you find the most suitable push button switch. Please contact us now to get yours.

SPDT Push Button Switch — FAQ Guide

In this FAQ guide, you will learn many things you may not have known before. You will discover its history, numerous applications, working principles, and components. Best of all, you will learn about its various types and features, helping you understand your options.

This guide will also help you ensure you find the most suitable switch for your application needs, along with other essential information for an optimal user experience. You will be amazed at how these switches can change your lifestyle and perspective on push button switches.

Continue reading this guide to make smarter and wiser choices for your switch selection.

1. What is an SPDT push button switch?

This switch, sometimes referred to as an SPDT push switch or SPDT button, is a Single Pole Double Throw switch, meaning it has one input terminal and two output terminals.

From the single connection, it can connect to or switch between either of the two outputs.

It is also called a three-way switch or, in British mains wiring terminology, a two-way switch.

It is also known as Form C, a basic break-before-make changeover switch where the common wire can be connected to either L1 or L2.

It is an ideal choice if you need to select or swap between two power sources or inputs.

2. Where is it being used for?

They are used in many applications.

For example, when you walk out in the streets you will find vending machines where you can get a drink by pressing the buttons.

In places such as the train stations, you can get your ticket by pressing the button of the ticket dispenser.

When you go home, you press the doorbell to have anyone from your family let you in.

These are just some examples of the common applications but unknown to most people, there are more uses such as the following:

• Controls on front panels (i.e. on/off button, reset, buttons for mode selections and eject function)
• Communication controls (i.e. high and low volume controls, scrolling menus, control keys)
• Consumer equipment (radios, remote controls, computers, joystick controls, peripherals)
• Transportation controls
• Agricultural, construction, off-road heavy industrial machinery
• Aerospace panels
• 医疗设备
• Marine and military equipment controls
• Telecommunications equipment
• Enterprise network equipment controls

And there could be more uses of them in other applications and different industries.

Different applications

3. How does its mechanism work?

It works starting from its three terminals: a common pin, and two more pins that connect to the common.

For example, the switch is connected to a red LED and a yellow LED where you can wire it to create one or two modes.

In one connection, the red LED is turned on and the yellow LED is off, while another connection would have the yellow LED turned on while the red LED is off.

In the first connection, when the user presses the button the red LED is turned off and the yellow LED is lit.

While for the second connection, the one that’s turned off is the yellow LED and then the red LED is the one lit up.

Depending on how it was wired, it can serve as an on-off switch or it can also be connected to serve as a ready or standby mode.

4. What are the components which comprise the SPDT push button switch?

It has similar components to other push button switches.

The external features have the following components:

• The head — This can refer to the actuator or it is the plate that houses the actuator button.
• The body or enclosure — This protects the internal components of the push button switch and is usually made from stainless steel.
• Pins — These are also known as the push button switch terminals, which can vary in number and can be soldered or screwed to connect the wirings.

While the components inside the SPDT push button switch are the following:

• The LED chip — This chip lights up when you push the button or stays lit depending on how you wire it.
• Spring — This metal spring allows the movement of the actuator so you can push it down to activate the switch.
• Movable and stationary contacts — These pieces of electrically conductive materials are positioned inside the push button switch and make contact when the actuator is pushed down, therefore allowing the current to flow.

5. Is the SPDT push button switch normally open or normally closed?

It can be a normally open or normally closed type of switch.

It can be an “on-on” switch, which means that it is in the “on” position in both states, commonly used to turn on two separate devices; hence it is called a changeover switch.

Aside from the push button type, SPDT can also be found in toggle switches, rocker switches, sliding switches, or microswitches.

Normally open type

6. How long is the life cycle of the SPDT push button switch?

The mechanical life cycle pertains to the number of times that you use the switch, while the electrical cycle refers to the internal parts of the push button switch such as the coils, springs, stationary and movable contacts.

Remember to only choose a high-quality switch to ensure longer mechanical and electrical life cycles.

7. What is the wiring guide of the SPDT push button switch?

The SPDT push button switch wiring guide depends on the number of its pins.

The illustrations below depict the wiring examples for different numbers of pins:

Different terminals of SPDT push button switch

You can also find the wiring instructions depending on the number of pins that the SPDT push button switch has.

For example, 2-pin push button switch datasheet, 4-pin push button switch connection, or 4-pin push button switch datasheet.

8. Does the SPDT push button switch have a harness type?

Some manufacturers include harness or pigtail connectors along with the SPDT push button switches.

An example of this is the 4-wire push button switch, which can come with a harness switch plug.

These are also called switch socket plugs and are usually made from plastic material.

You can verify this in the product’s images, description, and via the manufacturer as well.

The SPDT button switch socket plug already has several wirings attached to it, so you don’t have to solder the wirings to connect to the push button pins anymore.

The SPDT push button switch and the SPDT button switch socket plug may arrive separately, but you simply have to plug the switch into the socket and you’re all set.

The SPDT button switch socket plug has the same number of pin receivers as the SPDT push button switch in the same positions, so connecting them together is straightforward.

You can install your SPDT push button switch easier and faster and have it ready for use immediately.

SPDT Push Button Switch connector 19mm

9. What is one example of the SPDT push button switch electrical diagram?

One basic SPDT push button switch electrical diagram is shown below.

Other electrical diagrams may show relays or conductors depending on the purpose of the SPDT push button switch.

SPDT electrical wiring diagram

10. How many pins does the SPDT push button switch have?

The number of pins of the SPDT push button switch can be 4, 5, 6, or more.

它们也被称为端子或固定引脚，并具有各自特定的功能。.

例如，一个3引脚SPDT按钮开关具有以下引脚：

• NO代表常开
• NC代表常闭
• C代表公共端

一个4引脚SPDT按钮开关具有以下引脚：

• (+) 正极
• (-) 负极
• 1个引脚连接电源
• 1个引脚连接设备

一个5引脚SPDT按钮开关具有以下引脚：

• (+) 正极
• (-) 负极
• NO代表常开
• NC代表常闭
• C代表公共端

而一个6引脚按钮开关则具有以下引脚：

• (+) 正极
• (-) 负极
• 2个NO引脚用于常开
• 2个NC引脚用于常闭

您可能会发现其他SPDT按钮开关的引脚数量可能超过此处所述。.

标签在制造商之间是标准化的，因此您很可能会看到类似的引脚标签，这有助于避免混淆。.

订购SPDT按钮开关时，您还将收到接线文件，以指导您进行引脚接线。.

如果您需要对接线说明进行澄清或有疑问，也可以咨询制造商。.

11. SPDT按钮开关的可用电流范围是多少？

一般来说，SPDT按钮开关的电流范围在3安培到5安培之间。.

然而，您可以找到高达20安培的大电流型SPDT按钮开关。.

大电流SPDT按钮开关

12. 可以为SPDT按钮开关使用更高的电压吗？

制造商会在产品描述或包装上的产品信息中注明其SPDT按钮开关的额定电流。.

例如，您可以在产品描述中找到“12V单刀双掷开关”或“12V SPDT开关”的信息。.

您必须将SPDT按钮开关连接到额定电流范围内的电源。.

否则，开关可能会过热，内部元件可能烧毁，导致无法工作。.

如果无法避免这种情况，您可以加装一个继电器来控制流向SPDT按钮开关的电流，防止其过热。.

13. 如何定制您的SPDT按钮开关？

您可以通过咨询制造商来定制您的SPDT按钮开关。.

一些制造商接受对SPDT按钮开关的LED颜色、设计或所用材料的定制。.

您也可以请求材料选项来制作您的开关，或者将它们集成到您设计的特殊面板中。.

只需联系制造商并提供您的要求，他们将很乐意为您提供定制选项。.

这样，您就可以获得外观独特的SPDT按钮开关，以匹配其使用环境的设计。.

14. 是否有微型SPDT按钮开关？

是的，微型SPDT按钮开关通常用于PCB。.

它们是微小的按钮装置，可以适应任何有限的空间，通常用于Arduino电路。.

15. 能找到低矮型的SPDT按钮开关吗？

是的，您可以在一些制造商处找到低矮型的SPDT按钮开关。.

与标准按钮开关相比，这些类型的长度通常更短。.

它们非常适合面板或开关盒安装，因为其背面占用空间不大。.

16. 可以在水环境中使用SPDT按钮开关吗？

这取决于SPDT按钮开关的防水保护等级，该等级由IP等级或侵入保护等级定义。

IP等级针对可能进入SPDT按钮开关外壳并损坏内部组件的固体和液体元素提供不同级别的保护。.

保护等级由两个数字表示；第一个数字代表固体防护等级，第二个数字代表防水等级。.

如果外壳对这些元素具有良好的防护，其IP等级会有一组较高的数字，通常是IP65及以上。.

以下表格进一步描述了每个IP防护等级，供您参考：

IP代码等级定义

17. SPDT按钮开关是船用级开关吗？

有些SPDT按钮开关是船用级防水的，这意味着它具有强大的防水屏障。.

它可以浸入水下长达30分钟，并且仍能正常工作。.

有些人会混淆防水和防溅水。.

防溅水按钮开关可以防潮、防雨、防泼溅或类似条件，但在长时间浸入水下时可能没有足够的保护。.

因此，在寻找船用级SPDT按钮开关时，请确保在产品信息中明确描述，然后再购买。.

否则，您也可以直接咨询制造商并向他们确认此功能。.

18. SPDT按钮开关是防破坏型开关吗？

是的，SPDT按钮开关有防破坏类型可供选择。.

防破坏按钮开关是专门开发和设计的，用于安装在频繁使用或面临故意或意外损坏高风险的地方。.

它们还能够承受恶劣的天气条件，有时甚至是极端温度。.

您经常会在公共场所、商业场所内部，甚至在制造工厂的生产控制开关中看到这些类型的开关。.

由于防破坏SPDT按钮开关通常由不锈钢和其他高耐用性材料等坚固材料制成，它们得到完全保护，并且可以使用很长时间。.

制造商通常会注明其SPDT按钮开关产品是否防破坏，但您也可以自行判断。.

方法是检查其IK代码，具体来说，是否具有IK10密封，也称为EN 62262。.

IK代表冲击保护，即按钮开关外壳所能提供的防护程度。.

这有助于确定SPDT按钮开关能够承受的动能冲击等级。.

制造商将SPDT按钮开关提交进行名为夏比冲击试验的冲击测试。.

一旦SPDT按钮开关通过一系列测试程序，它将获得IK10认证，从而确保其具备防破坏性能。.

IK10 Chart

19. 您可以将SPDT按钮开关用于汽车吗？

您可以将SPDT按钮开关用于汽车或任何类型车辆的控制装置。.

您可将其用于汽车内外不同的电气用途，例如前照灯和雾灯、顶灯、底盘灯、电动车窗、音响控制等。.

如果您计划更换损坏的喇叭按钮或为汽车添加低音系统，可以使用SPDT按钮开关。.

除汽车外，它还可用于卡车、SUV、全地形车、摩托车等其他车辆。.

您始终可以通过在线视频教程自行完成安装步骤，也可以聘请机械师为您安装。.

如果您拥有全新车辆，可能需要咨询经销商，以避免车辆保修失效。.

在改装或更换工厂安装的汽车零件方面，他们很可能有特定政策。.

经典汽车仪表盘

20. 您可以将SPDT按钮开关用作汽车LED灯带的开关按钮吗？

是的，有些人会在 LED灯带 安装在汽车内部或外部，并连接SPDT按钮开关以控制LED灯的开关。.

SPDT按钮开关有两个输出端子，这意味着它可以同时点亮两条LED灯带。.

您可以根据需要随意接线，快速轻松地完成LED灯带安装。.

LED灯带

21. 您可以将SPDT按钮开关用作门和闸门的"推退出"按钮吗？

是的，您可以将SPDT按钮开关用作门和闸门的"推退出"按钮。.

它们可以轻松接线以替换旧的门或闸门控制按钮，并且功能与所替换的按钮完全相同。.

如果您不确定如何接线，可以查阅门或闸门"推退出"按钮的说明书以指导安装。.

此外，您可以寻求电工的帮助，用SPDT按钮开关更换控制装置，并确保接线正确。.

22. 您可以将SPDT按钮开关用于报警系统或安全警报系统吗？

是的，SPDT按钮开关也可用于此类系统。.

您可以将SPDT按钮开关连接到蜂鸣器或响铃装置，并在紧急情况发生时按下按钮触发警报。.

它也可以接线以在整个房屋或独立房间（如商业场所）发送警报信号。.

另外，您也可以使用 紧急按钮开关 以确保遵守您所在地区的安全标准规定。.

带卡扣的紧急按钮开关

23. SPDT按钮开关是否适合公共广播系统？

是的，SPDT按钮开关也适用于通常用于学校、公园、游乐场、火车站、体育场等场所的公共广播系统。.

公共广播系统包括扬声器、放大器、麦克风和其他类似电气设备，用于提高讲话者音量或播放音乐的音量。.

您可以连接SPDT按钮开关以更换公共广播系统上损坏的按钮。.

由于SPDT按钮开关采用耐用材料制成，非常适合需要长期频繁使用的公共广播系统。.

24. 您可以为DIY手提音响的控制装置安装SPDT按钮开关吗？

是的，当然可以。.

SPDT按钮开关的另一个优点是可用于DIY应用，例如构建自己的手提音响。.

音乐爱好者和音乐家喜欢构建自己的音频设备并设置他们喜欢的控制装置。.

这就是为什么SPDT按钮开关是DIY手提音响项目的理想选择。.

您可以根据喜好随意接线，很快就能完成DIY手提音响项目。.

25. 您可以为台灯和落地灯连接SPDT按钮开关吗？

是的，可以实现。.

事实上，按钮开关最早的应用就是用于路灯和手电筒按钮。.

您可以用SPDT按钮开关更换台灯和落地灯损坏的开关。.

通过正确连接SPDT按钮开关，您可以获得一个按钮控制的灯具，易于使用且适用于任何灯具设计。.

台灯

26. SPDT按钮开关有哪些不同的描述类别？

通常，您会看到SPDT按钮开关的以下描述类别：

• 订单代码——这表示系列号以及执行器、端子、功能、电流、材料、照明样式、LED颜色、照明电压的选项，有时还包括图形样式。.
• 产品描述——这列出了按钮开关的尺寸，包括直径尺寸和面板厚度。.
• 技术数据——这列出了SPDT按钮开关的其他技术和重要信息，包括最大开关额定值、接触电阻和绝缘电阻、介电强度、抗冲击和抗振动能力、环境温度、机械和电气寿命、IP和IK防护等级等。.

您还可以找到更详细的尺寸、透镜选项、面板开孔等信息。.

这些描述类别因制造商而异，但您会注意到他们都使用标准统一的术语来描述SPDT按钮开关信息。.

27. 如何购买SPDT按钮开关？

SPDT按钮开关通常可在线上购买，您可以通过制造商的网站进行采购。.

制造商可以接受大小不同数量的订单，并将您的订单送货上门。.

他们提供多种支付方式，因此在您需要SPDT按钮开关时随时购买非常方便。.

对于小订单，他们可能要求全额付款；而对于大订单，您只需支付总价的一部分，并在收到SPDT按钮开关后支付余款。.

价格和政策可能发生变化，因此最好与您的制造商确认这些信息。.

28. SPDT按钮开关有保修吗？

大多数制造商会告知您产品保修期，可能是1年、2年、3年或更长。.

保修范围和政策取决于制造商，因此您会注意到不同制造商之间的保修范围存在差异。.

此信息也可以在其网站的产品页面、订单附带的文件或广告中找到。.

像您这样的消费者应了解所购产品（包括SPDT按钮开关）的保修范围。.

You need to know what you can do if ever you receive a bad batch of switches, or if they suddenly stopped working.

The warranty includes the returns policy that will guide you on how you can request repair or replacement.

Otherwise, you can choose to contact your manufacturer and advise them of the problem.

You may be asked to send the SPDT push button switches back to the manufacturer so they can repair them.

The manufacturer also decides if the SPDT push button switches can be replaced with an entirely new batch of switches.

This repair process can take up to several weeks which can be a long time for some people.

This is why it is important to purchase from a trusted and reliable manufacturer to ensure that you will receive only the highest quality SPDT push button switches without any issues.

Usually, these manufacturers have been operating in business for many years which can attest to the quality of products they manufacture.

Their facilities and their products have undergone many quality inspections and certifications which is why they can guarantee 100% satisfaction to their customers.