5-1437567-8 Datasheet, PDF (292/326 Pages) Tyco Electronics – DIP Switch Part Number Index

Index/Matrixes
Glossary
• Actuation Force (Operating Force): The force required to
• Contact Bounce (Bounce): The time during switching in which
change the actuator of a switch from one position to the other.
electrical instability caused by the rebound of the contacts is
Unit of Measure: Slides - lbs., oz. or grams. Toggles and
observed. Unit of Measure: Millisecond.
pushbuttons - oz. Rotary products-torque.
• Contact Gap: The distance between a stationary contact and a
• Actuator: A movable part of a switch which causes a change in
moveable contact in the open position.
the electrical configurations of the switch.
• Contact Rating (Switching Rating): The capacity to switch
Example: Toggle Rocker Slider
(connect or interrupt) an electrical load. Unit of Measure: Volts,
Plunger Paddle Shaft
amps, load characteristic (resistive, inductive, capacitive, power
• Alternate Action: See Push-Push.
factor). Contrast with non-switching rating.
• Angle of Throw: The angle or arc through which an actuator
passes during actuation. Typically used to refer to the
movement of toggle or rocker actuators. Unit of Measure:
• Contact Resistance: The total resistance of the switch,
comprised of the contact interface and terminals. Unit of
Measure: Milliohms.
Degree.
• Cycles: The number of times a switch can be actuated from one
• Antistatic: An antistatic device will withstand a specified
potential without conducting between the actuator and any
extreme position to the opposite extreme position and back to
the original position.
conducting element, usually the terminals or bushing. Unit of • Detent: A mechanical stop that holds the contacts in a given
Measure: Typical value 15-20 kilovolts DC.
position after the actuation force is removed or prevents the
• Bifurcated Contact: A wiping movable contact consisting of
two spring fingers that grip fixed contacts. Typically found in
changing of contact position at less than a specified actuation
force.
slide switches. Self-cleaning action. See Wiping Contact.
• Detent Angle: The angle or arc between detent positions in
• Bobbin Contact: A movable contact shaped like a thread bobbin
rotary switches. Unit of Measure: Degree.
that rolls along the stationary contacts. Found only in slide
• Dielectric Strength (Dielectric Withstanding Voltage, DWV,
switches.
Leakage Resistance, Breakdown Voltage): The ability of an
• Bounce: See Contact Bounce.
insulator to withstand a voltage without arcing across its
surface. Most often applies to insulator between switch
• Break-Before-Make (Non-shorting, Break First): On
terminals and metal exposed to operator of switch. Unit of
actuation, the movable contact breaks contact with one fixed
Measure: Volts RMS, Volts AC.
contact before making contact with another fixed contact.
Contrast with make-before-break. Typical of toggle and
• Dielectric Withstanding Voltage: See Dielectric Strength.
pushbutton switches. (BBM)
• DIP: Dual-in-Line Package refers to a component with two rows
• Break First: See Break-Before-Make.
of PC terminals. The terminals are most commonly on a 0.100"
pitch with 0.300" between rows.
• Butt Contact: A contact mechanism in which the movable
contact makes contact with the fixed (stationary) contact
without wiping motion between the surfaces. Typical of toggle
and pushbutton switches. See Wiping Contact.
• Double-Break Contacts: A contact mechanism using two sets of
contacts to make or break a given circuit. This provides better
power handling capacity and longer switch life. Typical of high
power industrial switches. See Single-Break Contacts.
• Capacitive Load: A load in which the initial current on making
(closing) of the contacts is higher than the steady state current
on breaking (opening) of the contacts, the current is less than
steady state. Current leads voltage in capacitive loads. See
Resistive Load, Inductive Load, Power Factor and Inrush.
• Dry Circuit (Low Energy, Logic Level): An application in
which power levels do not cause arcing, melting or softening of
contacts. Typically requires gold plated contacts for reliable
switch operation. Typical Definition: 0.4VA max. @ 20 VDC
or peak AC.
• Carrying Current: The maximum current that can be passed
through the already closed contacts of a switch. Contrast with
• DWV: See Dielectric Strength.
“Contact Rating.”
• Electrical Life: The number of operations at a given electrical
• Contact (Contact Area): The metal surfaces that come into
physical contact to complete an electrical circuit. These
surfaces are found on moveable contacts (see) and terminals
(see).
load that does not result in a degredation of any electrical or
mechanical parameter beyond the standard set by the applicable
end-of-life criteria. Unit of Measure: Cycles (on-off operations)
(rotations).
M
• Contact Block: A switching element which is added singly or in
groups to an operator (see) to make a complete switch.
M7
Catalog 1308390
Issued 9-04
www.tycoelectronics.com
Dimensions are in inches
Dimensions are shown for
and millimeters unless otherwise reference purposes only.
specified. Values in parentheses Specifications subject
or brackets are metric equivalents. to change.
USA: 1-800-522-6752
Canada: 1-905-470-4425
Mexico: 01-800-733-8926
C. America: 52-55-5-729-0425
South America: 55-11-3611-1514
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Japan: 81-44-844-8013
UK: 44-141-810-8967