SWITCHCRAFT, INC. 5555 N. Elston Ave. • Chicago, IL 60630
79
JACKS AND PLUGS
FAX: 773 792-2129
JACKS AND PLUGS
DIMENSIONS ARE FOR REFERENCE ONLY Inch
(mm)
JACK SCHEMATICS
JACK SCHEMATICS
Circuit Types: Jacks normally have through circuits, shunt
circuits, and/or isolated switching circuits, either individually or
in various combinations.The chart below shows schematics of
39 common jacks - many more combinations are possible, but
these are the most commonly used. A basic description of the
switching action of each jack accompanies each schematic.
Military Identification: Military specifications covering phone
jacks use a special code to describe jack functions. Jack
schematic descriptions are coded J-1 through J-13 (as
appropriate) to coincide with Federal Item Identification
Guides for Supply Cataloging. One or more groups of suffix
numbers/letters identify isolated switching circuits used.
Suffixes identify the switching by industr y recognized notation,
i.e., 1-A, 1-B, 1-C, 1-D, etc. See chart below.
JACK SCHEMATICS
Notation Meaning
1-A One, SPST switching circuit. Also known as NO
(normally open) or “make” circuit.
1-B One, SPST switching circuit. Also known as NC
(normally closed) or “break” circuit.
1-C One, SPDT switching circuit. Also known as transfer
or “break” before “make” circuit.
1-D One, SPDT switching circuit. Also known as “make”
before “break” circuit.
Single open circuit. (J1.) Single closed circuit, Single closed circuit. (J4). Double open circuit. (J2). Single open circuit.
sleeve common. (J3). Isolated switching
“make” circuit. (J1-1-A).
Transfer circuit. (J5). Tip closed, ring Tip closed, ring open Single open circuit. Double closed circuit,
open. (J10). (common to sleeve). (J6). Isolated switching ring common to
“break” circuit. (J1-1B). sleeve. (J13).
Single closed. Isolated Double closed Single closed circuit. Double closed circuit. Double open circuit.
switching “make” circuit. (J7). Isolated switching Isolated switching Isolated switching
circuit. (J4-1A). transfer circuit. (J4-1C). “break” circuit. (J7-1B). transfer circuit. (J2-1C).
NOTE: Number indicates the quantity of circuit - 2-A means 2, A circuits.
Terminals locations shown on jack schematics do not necessarily coincide
with physical locations on jacks. Not all circuit types available on all jacks.
Double open circuit. Single closed circuit Single closed circuit– Single open circuit. Double open circuit.
Isolated switching– Isolated switching “make” before Isolated switching Isolated switching
separate “break” and “break” circuit. (J4-1B). “break”. (J8). transfer circuit. (J1-1C). “make” circuit.
make circuits (J2-1A-1B). (J2-1A).
Double open circuit. Double closed circuit. Single closed circuit Single open circuit. Single closed circuit.
Isolated switching– Isolated switching plus “make” before Isolated switching– Isolated switching
separate “make” “make” circuit on ring “break”. Isolated separate transfer and “break” circuit. Sleeve
circuits on both tip and spring. (J7-1A). switching–“make” “make” circuits. common to isolated
ring. (J2-2A). before “break” (J1-1A-1C). switching circuit throw.
circuit. (J8-1D). (J4-1B).
JACKS AND PLUGS
80
www.switchcraft.com ® Registered trademark of Switchcraft, Inc.
Note: Contact your Switchcraft Representative for price and delivery
PHONE: 773 792-2700
JACKS AND PLUGS
DIMENSIONS ARE FOR REFERENCE ONLY Inch
(mm)
JACK SCHEMATICS
JACK SCHEMATICS
Single closed circuit. Tip closed; r ing open Single open (tip) Double jack, Single open circuit–
Isolated switching– circuits. Isolated circuit and single closed 2-conductors on each “make” before
“make” before “break” switching–two “make” (r ing) circuit. (J9). side.Tip circuits cross “break”. (J11).
circuit. (J4-1D). circuits and one “break” shunted; common
circuit. (J10-2A-1B). sleeve. (J12).
Tip closed; ring closed Double closed circuit. Single closed circuit. Single open circuit. Double open circuit.
circuits. Isolated Separate sleeve Isolated switching– Isolated switching– Isolated switching–
switching–“break” “break” circuit. Two “make” circuits. Two “make” circuits. One “mak e” and one
before “make” circuit. “break” circuit.
Double closed circuit. Tip closed; r ing open Double closed circuit. Double open circuit.
Isolated switching– circuits. Isolated Isolated switching– Isolated switching–
One “make” and one switching–One Two “make” circuits. “break” before
“break” circuit. “make” circuit. “make” circuit.
JACK MATING DATA
NOTE: See tables for jack/plug mating data
SPECIFYING NOTE: Due to assembly variations containing components
(solder lugs, wire-wrapping terminals, or both), these Jack Panel
Assemblies are available on special order only. Contact Switchcraft.
Switchcraft can build complete Jack Panel Assemblies with
jacks, lamp jacks and switches with wire-wrapping terminals. If
desired, components with solder lugs and wire-wrapping
terminals can be installed in the same assembly.
WIRE-WRAPPING TERMINAL DESIGN
Jack springs with integral wire-wrapping terminals are made of
special copper alloy for maximum work-life with excellent
resistance to corrosion. Shank of terminal accommodates a
maximum of three wire connections. Tini-Telephone®phone
jacks, lamp jacks and switches with wire-wrapping terminals
have slightly higher stack due to greater spacing required for
wrapping tool access. Actuator springs and ground lug
terminals are .704" long by .060" wide.
WIRE-WRAPPING TERMINATIONS WIRE-WRAPPING CONNECTIONS
Use the char t below as a guide to recommended tools to
be used with varying ter minal thickness and wire gauges.
Recommended Wire-Wrapping Tool
Terminal (Gardner-Denver Co. Part Numbers)
Thickness Wire Use with 14B1-A Wrapping Tool
(Inches) Gauge Wrapping Bit Sleeve
.020 thru .032 22 & 24 500131 18840
.016 24 500131 18840
.016 thru .032 26 37006 17611-2
JACK SCHEMATICS
