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 industry recognized notation,
i.e., 1-A, 1-B, 1-C, 1-D, etc. See chart below.
Notation
1-A
1-B
1-C
1-D
Meaning
One, SPST switching circuit. Also known as NO
(normally open) or “make” circuit.
One, SPST switching circuit. Also known as NC
(normally closed) or “break” circuit.
One, SPDT switching circuit. Also known as transfer
or “break” before “make” circuit.
One, SPDT switching circuit. Also known as “make”
before “break” circuit.
JACKS AND PLUGS
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.
Single open circuit. (J1.)
Single closed circuit,
sleeve common. (J3).
Single closed circuit. (J4).
Double open circuit. (J2).
Single open circuit.
Isolated switching
“make” circuit. (J1-1-A).
Transfer circuit. (J5).
Tip closed, ring
open. (J10).
Tip closed, ring open
(common to sleeve). (J6).
Single open circuit.
Isolated switching
“break” circuit. (J1-1B).
Double closed circuit,
ring common to
sleeve. (J13).
Single closed. Isolated
switching “make”
circuit. (J4-1A).
Double closed
circuit. (J7).
Single closed circuit.
Isolated switching
transfer circuit. (J4-1C).
Double closed circuit.
Isolated switching
“break” circuit. (J7-1B).
Double open circuit.
Isolated switching
transfer circuit. (J2-1C).
Double open circuit.
Isolated switching–
separate “break” and
make circuits (J2-1A-1B).
Single closed circuit
Isolated switching
“break” circuit. (J4-1B).
Single closed circuit–
“make” before
“break”. (J8).
Single open circuit.
Isolated switching
transfer circuit. (J1-1C).
Double open circuit.
Isolated switching
“make” circuit.
(J2-1A).
Double open circuit.
Isolated switching–
separate “make”
circuits on both tip and
ring. (J2-2A).
Double closed circuit.
Isolated switching
“make” circuit on ring
spring. (J7-1A).
Single closed circuit
plus “make” before
“break”. Isolated
switching–“make”
before “break”
circuit. (J8-1D).
Inch
(mm)
Single open circuit.
Isolated switching–
separate transfer and
“make” circuits.
(J1-1A-1C).
Single closed circuit.
Isolated switching
“break” circuit. Sleeve
common to isolated
switching circuit throw.
(J4-1B).
DIMENSIONS ARE FOR REFERENCE ONLY
SWITCHCRAFT, INC. 5555 N. Elston Ave. • Chicago, IL 60630
JACK SCHEMATICS
Single closed circuit.
Isolated switching–
“make” before “break”
circuit. (J4-1D).
Tip closed; ring open
circuits. Isolated
switching–two “make”
circuits and one “break”
circuit. (J10-2A-1B).
Single open (tip)
circuit and single closed
(ring) circuit. (J9).
Double jack,
2-conductors on each
side. Tip circuits cross
shunted; common
sleeve. (J12).
Single open circuit–
“make” before
“break”. (J11).
Tip closed; ring closed
circuits. Isolated
switching–“break”
before “make” circuit.
Double closed circuit.
Separate sleeve
“break” circuit.
Single closed circuit.
Isolated switching–
Two “make” circuits.
Single open circuit.
Isolated switching–
Two “make” circuits.
Double open circuit.
Isolated switching–
One “make” and one
“break” circuit.
Double closed circuit.
Isolated switching–
One “make” and one
“break” circuit.
Tip closed; ring open
circuits. Isolated
switching–One
“make” circuit.
Double closed circuit.
Isolated switching–
Two “make” circuits.
Double open circuit.
Isolated switching–
“break” before
“make” circuit.
WIRE-WRAPPING TERMINATIONS
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 CONNECTIONS
Use the chart below as a guide to recommended tools to
be used with varying terminal thickness and wire gauges.
Recommended Wire-Wrapping Tool
(Gardner-Denver Co. Part Numbers)
Use with 14B1-A
Wrapping Tool
Wrapping Bit
Sleeve
500131
18840
500131
18840
37006
17611-2
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.
Terminal
Thickness
(Inches)
.020 thru .032
.016
.016 thru .032
Wire
Gauge
22 & 24
24
26
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.
JACK MATING DATA
NOTE:
See tables for jack/plug mating data
DIMENSIONS ARE FOR REFERENCE ONLY
Inch
(mm)
® Registered trademark of Switchcraft, Inc.
Note: Contact your Switchcraft Representative for price and delivery
www.switchcraft.com
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