Langir DPDT Push Button Switch

As a leading professional supplier for A push button switch, you may like Langir DPDT push button switch. It means double pole double throw. It acts like two separate SPDT switches connected to the same switch bat. This feature is mainly reflected in the L16 series, L19A series and L25 series.

Parts of a push button switch

The function has momentary type and latching type. When you press the switch and then move your finger, the actuator will return to the original position. This is momentary function. When you press the switch, it will change state and remain in this pushdown position; when you push it again, it will return to the original position. This is called latching function. Many people like to use ON OFF or alternative to indicate this function.

No matter for momentary or latching type, this switch has 2NO2NC— 2 normally open, 2 normally close. You or your customers have more choices for different usages. End users like to install them in the car, coffee machine, bank alert system etc.

Push button switches packages

DPDT push button switch panel cutout is 16mm, 19mm, 25mm. The tolerance for the hole size is less than 0.5mm. For example, for 19mm, the hoel size could be between 19.0 from 19.5mm. Otherwise if the hole is too big, when you install the switch on the panel, the raindrops maybe seep into the inner of the panel and the wetness will decrease the device life. You may remind your customers to note this.

We have professional before and after-sales service team and strong technical support. If you have any inquiries or consulting, you could get your positive feedback within 8 hours. Contact us today for the quick solution!

DPDT Push Button Switch — FAQ guide

In this FAQ guide, you will be learning everything. You will discover its many different types, shapes, colors, sizes, and many other kinds that you may not be familiar with.

Aside from that, you will also learn about its many uses that you can take inspiration from to experience the convenience and safety of them.

In this guide, you will also get our best advice about how you can choose the switch with the highest quality, therefore, putting more value on your money.

Read on to learn more about the DPDT push button switch and be more aware of your choices as a consumer.

1. What is the DPDT push button switch?

The DPDT or double pole and double throw push button switch have two input terminals and four output terminals and has six terminals in total.

The DPDT push button switch can also be considered as two SPDT switches combined.

Its other terminologies used for it are double pole double throw push button switch.

Generally, it is used as an on-on and the on-off-on type of switch function.

Fun Fact: The most feared button in the world is not real

Since the 1880s, people feared about one button that could blow up the entire world.

This is simply a baseless fear brought about by the development of push button switches and their growing number of applications during that time.

But it is popularly used by world leaders to impose power and fear over their enemies such as saying that they have a button sitting on their desk that can launch a nuclear war if they press it.

Fortunately, nuclear wars are more complex than simply pushing a button and it is also very expensive and unnecessary.

2. Does the DPDT push button switch work similarly to regular switches?

Yes, the DPDT push button switch works similarly to most standard push button switches.

To activate it, you will need to push the actuator down just like what you need to do in a standard push button switch.

The DPDT push button switch also looks similar to the rest but with a few reservations such as the materials used, the color, and its quality.

3. What are the sections of the DPDT push button switch?

Similar to other standard push button switches, the DPDT push button switch.

The outside of the switch has the following sections:

• Actuator — This is also called the DPDT button or the switch’s head and it has different designs, shapes, and illuminated options.
• Enclosure — Also known as the body, shell, or casing of the switch which houses the internal parts of the switch and holds all the parts together.
• Pins — These are the metal terminals where the wirings are soldered to or screwed.

The internal sections of the DPDT push button switch:

• LED — If it is a DPDT switch with an LED, it will have an LED chip inside located below the actuator.
• Spring — This allows the movement of the actuator every time you push it.
• Contacts — These are stationary and movable contacts that make contact to open or close the circuit.

Parts of a push button switch

4. What are the choices for selecting a DPDT push button switch?

Manufacturers provide many choices for DPDT push button switches.

From its size, color, material, illumination, and so on,

Here are some of the selections you can find in the market today:

• Diameter size of the DPDT push button switch:
  • 12毫米
  • 16毫米
  • 19毫米
  • 22毫米
  • 25毫米

There could be DPDT push button switches that are smaller or bigger than the sizes listed above; however, the sizes indicated on the list are the most common ones.

• Shapes of the DPDT push button switch:
  • Round DPDT push button switch
  • Square DPDT push button switch
  • Mini DPDT push button switch
  • Low Profile push button switch
• Actuator options for the DPDT push button switch:
  • Flat head.
  • Raised.
  • 方头
  • Ring symbol
  • Power symbol
  • Ring and power symbol
  • Laser etched head
  • 带照明
  • Non-illuminated
  • 背光符号
• Terminal options for the DPDT push button switch:
  • Solder lug terminals
  • Screw type terminals

Different types of push button switches

5. What do manufacturers use to make DPDT push button switches?

Manufacturers use different materials to make their DPDT push button switches.

Some of the materials used for the body, but not limited to, are listed below:

• Stainless steel (304 / 316 grade)
• Black metal shell
• Aluminum (Anodized available in different colors such as red, blue, yellow, green, orange, or simply natural)
• Nickel plated Brass
• Plastic

For the illuminated types, the actuator can be made from the same materials as the body or it can also be made with plastic, ceramic, or resin material.

You may find that some DPDT push button switches are made with two or three combinations of different materials.

6. Where is the DPDT push button switch generally used?

There are many uses for DPDT push button switches.

Among its many applications, the most common ones include home appliances, control switches in cars, and even home security purposes.

Aside from that, there are also other applications of the DPDT push button switch that you may not be familiar with, such as the following:

• 自动售货机
• Kiosks
• Water dispensers
• Medical and medicinal equipment
• Restaurants and cafes
• Food processing and packing industries
• Cosmetic manufacturing industries
• Car wash systems
• Agriculture and farming equipment
• Gas stations
• Security doors

There could be many others not listed here.

DPDT push button switches are versatile and you can see them almost anywhere you go.

Different uses of DPDT push button switches

7. How do you test a DPDT push button switch to see if it’s working or not?

Testing a DPDT push button switch is easy to do, but you will need to prepare your tools to test it properly.

What you will need is the following:

• DPDT push button switch
• Ohmmeter

And here are the steps:

1. Switch the ohmmeter on to test it while randomly selecting any function.
2. Connect the leads to the ohmmeter and test the leads by having the probes touch each other.
3. You’ll see 1 ohm or less on the ohmmeter display when the probes are touching each other; if there is no reading or a higher reading, the ohmmeter may not be functioning properly.
4. Then take the red lead and connect it to one of the terminals of the DPDT push button switch, then take the black lead and connect it to the other terminal.
5. If the switch is in the “on” position, the ohmmeter should display 1 ohm.
6. While when it is in the “off” position, the ohmmeter will display “OL,” which means that the switch has a very high resistance.
7. Try to turn the switch on and off once or twice to confirm the changes in the ohmmeter display.
8. If the values on the ohmmeter change from 1 ohm to “OL” as you turn the switch “on” and “off,” it indicates that it is in good working condition.
9. If the values on the ohmmeter do not change, that indicates that the DPDT push button switch is not working.

You may contact your manufacturer or vendor for a possible replacement or repair.

Otherwise, you can purchase another DPDT push button switch, and this time, be careful in choosing your switch.

Always look for high-quality DPDT push button switches manufactured by trusted companies only.

An ohmmeter

8. Does the DPDT push button switch have a long life?

Yes, but this depends on the quality of the DPDT push button switch.

通常，如果开关被评定为高品质，其工作寿命会高于那些评定为中等品质的开关。.

高品质的DPDT按钮开关通常具有1,000,000次机械寿命周期和200,000次电气寿命周期。.

这些数值可能因制造开关所用的材料和制造商规格而异。.

您可以在产品的数据表或目录中找到此信息，但也可以向制造商确认。.

9. DPDT按钮开关有哪些优点？

由于DPDT按钮开关在全球多种行业中得到应用，它被广泛认为是一种具有诸多优点的开关。.

除了能为消费者提供多种不同选择外，它还具有以下特点：

• 占用空间小
• 易于安装和使用
• 安装牢固可靠
• 价格实惠，符合预算
• 有助于降低安全风险
• 是通用型开关，适用于任何应用

当您开始使用DPDT按钮开关后，可能会发现它的其他优点。.

它们也易于清洁，几乎不需要或完全不需要维护。.

您可以通过制造商购买DPDT按钮开关，也可以在大多数线上市场或本地五金店找到它们。.

10. DPDT按钮开关的强度如何？

电子和电气设备需经过特定认证，以测试设备外壳的强度。.

DPDT按钮开关也是如此。.

它需经过一系列抗冲击测试，以确定按钮开关材料的强度，从而保护其外部和内部部件。.

这项国际公认的测试被称为IK等级或抗冲击保护等级。.

IK等级包含多项测试，对应不同的保护级别。.

如果DPDT按钮开关通过某一级别的测试，将获得相应的保护等级。.

最高保护等级为IK10。.

通过查看下图，您可以更好地理解：

IK10 Chart

11. DPDT按钮开关有哪些不同的安培规格？

制造商为满足不同应用需求，生产了具有不同额定电压的DPDT按钮开关。您可以找到诸如2安培、3安培直至5安培的安培规格。.

LED的电压则不同，它决定了LED的颜色或亮度强度。LED的额定电压可能为3.3伏、6伏、12伏、24伏、36伏、110伏和220伏。.

红色LED的电压是所有颜色中最低的，它也是最早被开发出来的LED颜色。而绿色和黄色LED的电压略高于红色LED。蓝色和白色LED的电压最高。.

12. DPDT按钮开关的安装类型是什么？

DPDT按钮开关具有不同的安装类型，如下所示：

• 面板安装——开关安装在面板、外壳、开关箱等内部。.
• 表面安装——开关安装在表面区域之上。.
• 嵌入式安装——开关安装在孔内，这有利于获得更好的表面间隙。.

产品信息或您的制造商将告知您所选DPDT按钮开关的安装类型。.

13. DPDT按钮开关的焊接热条件是什么？

焊接DPDT按钮开关时，请确保使用适合电压的正确尺寸的电线。.

一些制造商会提供布线安装的焊接指南，其中包括推荐的焊接温度和其他重要的焊接信息。.

然而，以下列表是您在为DPDT按钮开关布线时可以参考的一些焊接技巧。.

• 以25°角进行焊接
• 使用0.5至0.75 mm²之间的导体尺寸
• 进行手工焊接时，使用30瓦功率并在5秒内完成焊接
• 进行浸焊时，使用240°C并在3秒内完成焊接，然后让接线端子静置约一分钟后再施加任何外力。.
• 焊接时避免触碰端子板，否则可能导致其熔化。.
• 确保电线不接触开关。.
• 保持电线之间有足够的间隙或距离，以避免短路和开关故障。.

焊接任何开关的端子都需要小心操作，但如果您不太熟悉如何焊接，也可以选择购买附带引线连接器的DPDT按钮开关，或单独购买引线连接器。.

引线连接器已附带电线，无需再焊接端子。.

只需将开关插入引线连接器，并将电线的另一端连接到电源和您的设备或装置上。.

正如您所见，布线过程更快，您可以立即完成DPDT按钮开关项目并投入使用。.

焊台

14. 如何确保使用DPDT按钮开关时的安全？

在处理任何电气设备时，必须注意安全，以避免发生意外事故。.

使用同样属于电气设备的DPDT按钮开关时也是如此。.

在安装开关之前，请确保采取以下措施以保证自身安全：

• 如果您正在操作带电线路，请关闭主电源或电源。.
• 避免接触有电流通过的部件。.
• 确定开关的电压容量，并匹配正确的电源电压。.
• 检查开关是否有任何可见的腐蚀迹象或损坏，以便进行可能的维修或更换。.
• 在开始布线过程之前，务必先理解布线指南。.
• 在安全区域工作，周围不得有易燃气体，以防止火花和火灾事故。.

您的制造商可能还会提供文件，其中包含在安装DPDT按钮开关之前和期间应遵循的一系列安全措施。.

15. 如何为DPDT按钮开关进行面板安装？

DPDT按钮开关可以轻松安装，但做好准备并正确进行安装有助于加快安装速度，并避免浪费一个好的开关。.

推荐使用以下工具进行安装：

• DPDT按钮开关
• 面板开孔模板作为导向
• 面板、电路板或安装开关的基材
• 螺丝刀或带焊锡的烙铁（取决于端子类型）
• 螺丝式端子需要螺丝刀
• 焊接片式端子需要电烙铁和焊锡

安装DPDT按钮开关时可参考以下简易步骤：.

1. 准备安装开关的面板。.
2. 沿开孔模板描边，并使用孔锯在面板上切割开孔。.
3. 检查开关是否能与开孔完全匹配。.
4. 准备开关接线所需的工具。.
5. 卸下开关的紧固螺母。.
6. 按照接线指南将导线连接至端子。.
7. 将开关插入开孔并重新紧固螺母。.
8. 将导线末端连接至电源和设备。,
9. 测试DPDT按钮开关。.

当电源功率超过开关负载时，电路中可能需要加装继电器。.

若在直接供电且线路复杂的电路中安装开关，建议咨询持证电工进行专业安装以确保安全。.

钻头套件/孔锯

16. DPDT按钮开关发热的原因？

您可能注意到DPDT按钮开关出现异常发热现象。.

可能原因包括：安装不当、接线错误、开关质量低劣或输入功率过高。.

请排查上述原因，并停止使用开关以确保安全。.

联系制造商反馈问题以获取解决方案。.

若开关存在故障，可能需要返厂维修或更换产品。.

17. DPDT按钮开关是否存在常见问题？

除前述问题外，DPDT按钮开关可能因其他原因出现故障。.

此类情况尤其在产品过保后可能发生。.

但可通过简易维修使旧开关恢复功能。.

常见问题、原因及解决方案如下：

• 接触不良
  • 可能因触点烧蚀、弹簧腐蚀或开关表面积尘导致。.
  • 可尝试更换触点或弹簧，并擦拭开关表面。.
• 短路
  • 开关内部塑料热敏件可能老化变形，或触点间积聚污垢（尤其非完全密封型开关）。.
  • 可尝试更换热敏件并清洁触点周围积垢。.

18. DPDT按钮开关是否具备自锁功能？

是的，DPDT按钮开关同时具备自锁型与非自锁型。.

自锁功能类似按压式圆珠笔：首次按压保持锁定状态，再次按压复位。.

此功能通过内置锁定机构实现，可阻止执行器回弹。.

19. 如何实现DPDT按钮开关的LED常亮与触发亮两种接线方式？

DPDT按钮开关的LED接线（无论常亮或触发亮）均可简易完成。.

假设使用五针开关，引脚标识如下：

• 正极端子
• 负极端子
• Common
• Normally closed
• Normally open

LED常亮接线方法：

• 将正极与常开端子焊接并联后连接电源线
• 公共端连接设备
• 负极端子接地
• LED将保持常亮

LED常亮接线示意图

LED触发亮接线方法：

• 将正极与常开端子焊接并联后连接设备线
• 公共端连接电源
• 负极端子接地
• LED仅在按压开关时点亮

LED触发亮接线示意图

制造商通常会在DPDT按钮开关订单中附赠接线说明。.

也可在制造商官网、产品列表或广告中查询该说明。.

若未收到接线说明，可通过电话或邮件联系制造商索取。.

20. DPDT按钮开关能否用于汽车改装？

可以，DPDT按钮开关非常适合汽车改装用途。.

适用于电动车窗控制、音响控制、前雾灯开关、喇叭按钮等场景。.

经典车型与现代汽车中均存在使用DPDT按钮开关替代原厂控制按钮的案例。.

Some people opt for DIY installation to save on professional fees, but hiring a mechanic to perform the job saves time, as they are experienced in car modification tasks.

经典汽车仪表盘

21. Can a DPDT push button switch be used for door and gate entrances?

是的，可以实现。.

Another advantage of the DPDT push button switch is the security it provides.

It cannot be easily opened or tampered with, making it suitable for door and gate switches.

Whether you are building your own entrance control device or replacing an existing one, a high-quality DPDT push button switch will perform effectively.

22. Is the DPDT push button switch suitable for household appliance control buttons?

Yes, it is ideal as a control button for household appliances.

For example, as a replacement for controls on washing machines, cooking stoves, coffee makers, etc.

Additionally, the DPDT push button switch can also be used to replace switches for stand lamps, desk lamps, ceiling fans, and many other devices.

Push button on appliances

23. How to modify your DPDT push button switch?

If you prefer a unique switch for your home or business, you can request modifications or customization of your DPDT push button switch.

Some manufacturers accommodate such requests to provide better switch solutions for their customers.

They understand that some customers have specific needs or preferences for push button switches that are not available on the market.

Here are some customization options you can request from your manufacturer for your DPDT push button switch:

1. You can request a change in the material used and select from other materials available from the manufacturer.
2. You can ask for a specific diameter size, if possible.
3. You can send your business logo or a custom-designed logo to be imprinted on the switch.
4. You can also request a specific color or combination of colors for the switch.
5. You can ask for other operational types, such as self-locking or touch sensor functionality.

There may be additional modification options that the manufacturer can provide, which are not listed above.

24. Does the DPDT push button switch require maintenance?

Although a high-quality DPDT push button switch requires minimal maintenance, proper care can help extend its operational lifespan.

It can also help maintain the switch's appearance and prevent damage.

Here are some simple ways to keep your DPDT push button switch in good working condition:.

• Handle with care
  • Despite being made from durable materials, improper handling, such as frequent dropping, can loosen internal contacts and lead to switch failure.
• Do not use sharp objects to press the button
  • Using sharp objects to press the DPDT push button switch can cause visible damage to the actuator and degrade its appearance.
  • Use your finger or a safe finger tool to press the button without direct contact.
• Regularly wipe the surface of the DPDT push button switch
  • Generally, push button switches are dust-proof, but you can still wipe them with a clean tissue or cloth to remove deeply embedded dirt.
• Use the DPDT push button switch within its recommended applications
  • For example, do not use non-waterproof switches for outdoor installations or near water environments.
  • Or avoid using non-vandal-proof switches in high-traffic or public areas.
• Avoid exposing the DPDT push button switch to direct sunlight
  • Direct sunlight can cause the switch's color to fade quickly and lead to material deterioration.
  • It can also increase resistance when pressing the button due to failing internal contacts.
• If not in use, store the DPDT push button switch properly
  • Proper storage of unused DPDT push button switches helps maintain their quality for future use.
  • Store them in their original box or a similar container in a cool, dry place.
  • Place them on high shelves, out of reach of children.
  • It is also advisable to label the box clearly for easy identification.

Storing switches properly