704.603.4 EAO, 704.603.4 Datasheet - Page 109

• Manufacturer Part Number: 704.603.4
• Description: LENS, ROUND, YELLOW
• Manufacturer: EAO

Specifications of 704.603.4

• Lens Color: Yellow
• Lens Diameter: 29mm
• Leaded Process Compatible: Yes
• Lens Shape: Round
• For Use With: Series 14 Illuminated Pushbuttons
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Safety low-voltage
DIN EN 61058 T. 1 (VDE 0630 T. 1 ) para. 3.2.2 => A voltage (V) not greater than
50 V (effective) between the electrical conductors or between any conductor
and earth in a circuit isolated from the main supply
Screw terminal
Connection of the electrical circuit by means of a screw device
Selector switch
Switch with a knob as operation part
Selector switch actuator
Front part of a Selector switch, without Contacts
Selector switch long lever
Switch with a long lever as operation part
Service category
IEC 947-1 para. 2. 1 . 1 8 / 4.4 => Combination of fixed requirements which have
been chosen, when taking into consideration the operating conditions of a
Switchgear, in order to meet the needs of a fundamental group of practical
cases of application (i.e: AC 15)
Shock resistance
Property of a switchgear to withstand impetus-type movements without
change of operational state and without damage
Short-circuit protection
Current value (A) of the fuse to be installed on the switchgear to protect it from
short-circuit damage
Short-travel switch
Pushbutton with small actuating travel (mm)
Single-Break
Contact, in which a disconnection of the circuit is present. Mechanism that
transfers one contact
Slow Make/Break Contacts
Usually used with A.C. circuits, especially emergency stop switches
Slow-make element
Switching element, in which the speed of the moving contacts is dependent
on the activation speed
Small contact opening width
DIN EN 61058 T. 1 (VDE 0630 T. 1 ) para. 3.4.6 => Minimum contact opening that
is sufficient for reliable operation
SMD, SMT
Abbreviations for surface mount device and surface mount technology,
respectively
Snap-action switching element
The rapid transfer of contacts from one spring loaded position to another.
This action is essentially independent of actuator speed. Switching element,
in which the speed of the moving contacts is essentially independent of the
activation speed
Solder heat resistance
Time and temperature unit for the connection of conductors to a solder
connection of the Switchgear
Soldering terminal (and similar)
DIN EN 61058 T. 1 (VDE 0630 T. 1 ) para. 3.6. 1 4 => Electrically conducting part of
a Switch, which has been provided to make a connection with the help of solder
Soldering/Plug-in terminal (and similar)
Electrical connection of a circuit by means of soldered or plug-in terminals
Sound pressure
Measure (dBA) for the volume, in relation to the distance of an acoustic signaller
Spacer
For uniform clearance between front panel and PCB (Series 92)
Spacing
Distance between electrically active parts of opposite polarity or to ground
Spacing cap
For expansion of the clearance between Switching element (on PCBs) and
front panel (series 70)
EAO Switch Condensed Catalog 100
Standard
Contains a number of stipulations for the definition i.e: of a regulation such
as VDE
Starting torque
Measurement (Nm) for the turning effect of a force (N) being applied to a
turnable body (i.e: mounting nut)
Stipulations
Components of a standard
Storage temperature
Permissible temperature range (°C) for the storage of a device
Switch
Device for the closing and opening of one or more circuits by activation of contacts
Switch rating
Specification regarding Rated higher currents in dependency on a rated
higher voltage
Switch with small contact separation
Switch with a contact disconnection for small contact opening width
Switchgear
Generic term for all Pushbuttons and Switches
Switching element
Contains one or more Contacts, which are necessary for the opening or
closing of a circuit (i.e: screw, spade, etc...)
Switching element and diodes
Combination of Switching element and Diode element
Tactile Feel
An indication, usually by touch, that indicates the operating position (actuation
point) has been reached
Terminal
The conductive part of a device, that has been provided for electrical connection
to an external circuit (i.e: screw, spade, etc...)
Terminal strip
Unit with several screw-type terminals for device connection i.e: with resistors
Throw
Throw is a single movement, controlling one or more contacts
Tool
Aid for assembling, disassembly of Switchgear or Indicators and their individual
parts or accessories
Translucent
Light-transmitting, diffuse material structure for uniform illumination by means
of filament lamps
Transparent
Light-transmitting, clear structure - recommended for the use of a film insert in
a lens or for illumination by means of an LED
Travel
Travel path of the Operation part until activation of the Contact, expressed in mm
UL
Abbreviation for Underwriters Laboratories, a U.S. rating organization
VDE
Abbreviation for the German Testing Agency, a German rating organization
Volume resistivity
Resistance value (mostly in mOhm) between two connections, whose related
Contacts in the closed state complete a circuit
Wiping Contacts
Wiping action contacts slide against each other when opening or closing
a circuit. This action helps clean the contacts of contamination and keeps
contact resistance low
Glossary
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