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LEXICON
Operation, contact types
and materials
18
Operating speed
Snap switches are suitable for a broad spectrum of operating speeds. How-
ever, extremely slow or fast actuations can affect the switch performance
and operating life. For product-speci?c values, please see the technical
speci?cations. The maximum switching frequency (switchings/s) is limited
by the electric load. With low switch loads, up to 10 actuations per second
are possible.
Please note:
Sudden actuation must be avoided since it decreases the mechanical
operating life.
Contact bounce
Bounce time is the time between the moment closing contacts ?rst touch
and ?nal (de?nitive) contact closure. The typical bounce time for our snap
switches is between 1.5 and 3 ms, depending on the series.
Transit time
In two-way (double-throw) switches, transit time is the time between
the moment the break contact element (NC contact) ?rst opens and the
make contact element (NO contact) ?rst closes. Transit time is generally
determined by design features such as e. g. contact travel and elastic
characteristics.
It generally varies between 3 and 10 ms, depending on the model.
Please note:
If transit time is critically important to the functioning of your applica-
tion, don‘t hesitate to contact us.
Contacts
We supply switches with standard and crosspoint contact technology. For
low-voltage and low-current applications, we strongly recommend the use
of gold crosspoint contacts. The reduced surface area of the cross-shaped
contacts means that the surface pressure is greater, which in turn enhances
reliability. Standard contacts are more suitable for higher switched loads.
Contact materials
Gold and gold alloys: primarily AuAg; AuAgPt
Silver and silver alloys: primarily AgNi; AgSn0 2
Gold alloys are especially suitable for low currents and voltages. Typically
they are used in the range from 5 V, 1 mA DC to 12 V 100 mA DC. But it
may also make sense to use them in switches which are only occasionally
operated or in atmospheres with a high sulphur content.
For switching heavier loads, it usually makes sense to use silver or silver
alloys. In this case, the range typically extends from 12 V, 100 mA DC to
250 V 21 mA AC.
Please note:
Because choosing the right contact materials depends on a large number
of factors, such as switching voltage and current, operating environment,
atmospheric conditions, etc., we are always pleased to advise you on the
best choice of material for your application. Before making any ?rm deci-
sions, we do advise you to carry out ?eld trials of our switches in real-life
conditions.
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相关代理商/技术参数
DB2C-B1RC
功能描述:基本/快动开关 SPDT 10A QC TERM
RoHS:否 制造商:Omron Electronics 触点形式:SPDT 执行器:Lever 电流额定值:5 A 电压额定值 AC:250 V 电压额定值 DC:30 V 功率额定值: 工作力:120 g IP 等级:IP 67 NEMA 额定值: 端接类型:Wire 安装:Panel
DB2C-B1RC
制造商:The Cherry Corporation 功能描述:Snap Action Basic Switch
DB2C-B1SC
制造商:The Cherry Corporation 功能描述:MICROSWITCH SPDT SIM ROLLER LEVER 制造商:Cherry 功能描述:QC simroller V4 switch, 10A
DB2CBWAA
制造商:The Cherry Corporation 功能描述:
DB2CBWAB
制造商:The Cherry Corporation 功能描述:Switch, Snap Action, Custom Extra Wide Actuator
DB2CC1AA
功能描述:SWITCH SNAP SPDT 10A PC MNT RoHS:是 类别:开关 >> 快动，限位，拉杆 系列:DB 其它有关文件:Declaration of Conformity 标准包装:1 系列:*
DB2C-C1AA
功能描述:基本/快动开关 10.1A PCB MNT BUTTON
RoHS:否 制造商:Omron Electronics 触点形式:SPDT 执行器:Lever 电流额定值:5 A 电压额定值 AC:250 V 电压额定值 DC:30 V 功率额定值: 工作力:120 g IP 等级:IP 67 NEMA 额定值: 端接类型:Wire 安装:Panel
DB2C-C1AA
制造商:The Cherry Corporation 功能描述:SNAP ACTION BASIC SWITCH