关于安装

　　开关的安装，拆卸和配线作业及维护检查时，请务必在电源OFF 的状态下进行。否则可能引起触电或者烧损。

关于配线作业

　　请不要在开关通电状态下进行配线作业。此外在通电时请不要触摸端子的带电部位。否则可能引起触电。

　　配线作业和焊接作业请根据[正确的使用方法]进行配线。如果配线或焊接不良，通电时可能由于异常发热引起烧损。

关于接点负载

　　请根据接点负载选择适当的开关额定值。如果对接点施加超过接点负载的电流，会引起接点的熔接、移动，可能造成短路和烧损。

关于负载的种类

　　根据不同的负载的种类，如下图所示恒定电流和浪涌电流可能有较大差异。请根据负载种类选择合适的额定开关。闭路时浪涌电流越大，接点的消耗量、移动量就越大，会引起接点的熔接、移动、可能造成短路或烧损。

关于使用环境

　　请不要在易燃气体、易爆气体等环境中使用开关。由于开关时产生的电弧和开关的发热，可能引起起火或爆炸。

关于对开关个体的冲击

　　请不要使开关跌落或拆分开关。否则不仅无法满足其特性，还可能引起破损、触电、烧损。

关于耐久性（寿命）

　　开关的耐久性（寿命）根据开关条件的不同差别很大。在使用时请务必在实际使用条件中确认实际设备，在性能允许的开关次数范围内使用。如果在性能劣化的状态下继续使用，最终可能引起绝缘不良，接点熔接、接触不良和开关本身的破损、烧损。

关于开关的使用

　　在实际使用开关时，可能发生一些理论上无法预料的事故。因此，必须在可能实施的范围内进行测试。

资料中记载的各额定性能值，在没有特别指明的情况下，是指在标准试验状态（温度+15～+35 ℃、相对湿度25～75%、气压86 ～106kPa ）下的数值。在用实际设备进行测试时，请确认不仅是负载条件要相同，使用环境也应和实际使用状态的条件相同。

资料中记载的参考数据是将从生产线中抽样测得的实际值编成图表，而并非保证值。

资料中记载的各额定值、性能值是单独测试中得到的数值，但不能同时保证各额定值、性能值的复合条件

选择正确的开关

　　请根据使用环境和负载条件选择合适的开关并使用。

请根据额定电流、操作负荷、驱动杆的种类、环境条件在选择指南中选择适合的开关。

用开关较大电流的开关代替微小电流开关使用会影响接点的可靠性，因此请尽量避免。请选择适合开关电流大小的开关。在可能被水等液体浇淋的，杂质、尘埃较多的环境中请使用密封型开关。

电气事项

　　关于使用负载

　　交流和直流的开关能力差异很大，因此请确认额定值。直流的场合控制容量非常小。这主要是由于它不象交流那样有零点（电流零交叉点），因此一旦产生电弧后就很难消除，导致电弧时间变长。此外，由于电流方向固定，会引起接点的迁移，由于凹凸不平造成接点无法断开，也容易造成误动作。

在包括感应在内的情况下会产生反向感应电压，电压越高能量就越大，导致接点的消耗、迁移也变大，因此请确认额定的条件。

开关微小负载侧，高负载侧分别使用各自负载区域开闭负载时，请连接适合负载的继电器。

各机种额定值的条件如下。

感性负载：功率因数0.4 以上（交流），时间常数7ms 以下（直流)

电灯负载：有相当于恒定电流的10倍的浪涌电流

电动机负载：有相当于恒定电流的6倍的浪涌电

注. 感性负载在直流电路中尤其会成为问题，因此必须充分了解负载的时间常数（L/R ）的数值。

浪涌电流

　　关于在电子回路中使用开关欧姆龙微动开关在接点切换时，会发生跳动、震颤，引起电子回路和音响设备的噪声干扰和脉冲出错等故障。为了避免这种影响，请采取下面的措施。设计电路时，设置CR电路等浪涌吸收电路。

使用采用了不易受到环境影响的使用金接点的微小负载用开关。

About the installation

The installation, disassembly, wiring and maintenance inspection of switches must be carried out in the power OFF state. It may cause electric shock or burn damage.

About wiring

Do not do wiring when the switch is on. In addition, please do not touch the live part of the terminal when power is applied. Otherwise you might get an electric shock.

Wiring and welding work according to the [correct use] wiring. If the wiring or welding is not good, the abnormal heat may cause the burning loss.

About the contact load

Select the appropriate switch rating for the contact load. If the current applied to the contact exceeds the load of the contact, it will cause the melting and movement of the contact, which may cause short circuit and burning loss.

About the type of load

Depending on the type of load, the constant current and surge current as shown in the figure below may be quite different. Please select the appropriate rated switch according to the load type. The larger the surge current in the closed circuit, the greater the consumption of the contact, the greater the amount of movement, will cause the welding of the contact, movement, may cause a short circuit or burning loss.

About the environment

Please do not use switch in flammable gas, explosive gas and other environment. Because of the arc and the heating of the switch, a fire or explosion may be caused.

About the impact on the switch individual

Do not drop or split the switch. Otherwise not only can not meet its characteristics, but also may cause damage, electric shock, burn damage.

On durability (life)

The durability of the switch varies greatly according to the switching conditions. When using, please be sure to confirm the actual equipment in the actual conditions of use, and use it within the range of switching times allowed by the performance. If continue to use in the state of performance deterioration, may eventually cause poor insulation, contact welding, poor contact and switch itself damage, burning.

About the use of switches

In the actual use of the switch, some unexpected accidents may occur theoretically. Therefore, testing must be done to the extent possible.

The rated performance values recorded in the data, unless otherwise specified, refer to the values under standard test conditions (temperature +15 ~ +35 ℃, relative humidity 25 ~ 75%, air pressure 86 ~ 106kPa). When testing with actual equipment, make sure not only the load conditions are the same, but also the operating environment is the same as the actual operating conditions.

The reference data recorded in the data are charts of actual values sampled from production lines, not guaranteed values.

The ratings and performance values recorded in the data are values obtained in separate tests, but the compound conditions for the ratings and performance values cannot be guaranteed at the same time

Select the right switch

Please select the appropriate switch and use it according to the use environment and load conditions.

Please select the appropriate switch in the selection guide according to the rated current, operating load, type of drive rod, and environmental conditions.

Using a switch with a large current instead of a small current will affect the reliability of the contacts, so please try to avoid it. Please select the switch suitable for the current. Use a sealed switch in an environment that is likely to be doused with water or other liquids, with lots of impurities and dust.

Electrical items

About service load

Ac and dc switching capabilities vary widely, so please confirm ratings. Dc field control capacity is very small. This is mainly because it does not have a zero point (zero crossing point of current) like ac, so once an arc is produced, it is difficult to eliminate, resulting in longer arc time. In addition, due to the fixed direction of the current, it will cause the migration of the contact. Due to the unevenness of the contact, it cannot be disconnected, and it is easy to cause the wrong operation.

The higher the voltage, the greater the energy. This will lead to greater contact consumption and migration. Therefore, please confirm the rated conditions.

Switch the small load side and the high load side with their respective load areas to open and close the load, please connect the relay suitable for the load.

The conditions for each type of rating are as follows.

Inductive load: power factor above 0.4 (ac), time constant below 7ms (dc)

Lamp load: a surge current equivalent to 10 times the constant current

Motor load: surge of 6 times constant current

Note: inductive loads are particularly problematic in dc circuits, and the value of the load time constant (L/R) must be fully understood.

The surge current

When the omron microswitch is used in the electronic circuit, pulsations and tremors will occur, which will cause the noise interference and pulse error of the electronic circuit and audio equipment. To avoid this, take the following steps. When designing the circuit, set CR circuit and other surge absorption circuit.

The use of the use of the environment is not easily affected by the use of gold contact for small load switches.