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LEXICON
Snap Switches –
De?nitions and descriptions
Snap switches are activated by a
spring-operated (or “snap-action“)
mechanism. Depressing the actuator
triggers the switching operation, with
Actuator
Applying force to the actuator of a snap switch releases the snap-action
mechanism, which in turn triggers the switching operation.
Auxiliary actuator
It is possible to attach an auxiliary actuator to a snap switch in order to
meet the speci?c requirements of a given application. Doing so usually
alters the travel and forces involved in the switching operation, depending
on the length of the levers. By attaching an appropriate auxiliary actuator,
it is possible to increase travel and/or reduce the actuating force required.
a pre-de?ned force and travel. The
Terminals
switching speed itself is largely inde-
COM (Common = 1):
Base terminal
NC (Normally Closed = 2): The contact is closed in the rest position, that
pendent of the speed of actuation.
is, the terminal is connected to COM. When
the switch is actuated, the contact opens.
NO (Normally Open = 4): The contact is open in the rest position, that
is, the terminal is separated from COM. When
the switch is actuated, the contact closes.
Contact gap
(contact opening distance)
The contact gap is the distance between a pair of open contacts. For snap
switches, it is usually around 0.3 mm. Generally speaking, for switches
with contact gaps < 3 mm, additional measures are
necessary for separation from the mains. These switches bear the mark μ
for European approvals. Switches with a contact gap > 3 mm can general-
ly be used directly for separation from the mains. Please check the device
speci?cations applying to your particular product, and if there is any doubt,
please clarify with the responsible testing agencies.
Clearance
and creepage distance
Clearance is the shortest distance through the air between two electrically
conductive parts or between an electrically conductive part and a metal foil
af?xed to an accessible surface of some insulating material. The creepage
distance is the shortest distance along the surface of an isolating material
between two electrically conductive parts or between an electrically con-
ductive part and a metal foil ?xed to an accessible surface of the insulating
material.
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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