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1/4" PHONE JACKS
1.
14B
2.
FAL-11 .205 FASTON TERMINAL
3.
PC-12A
4.
11
click here to download a schematic drawing
click here to download a schematic drawing
(you will need to have Adobe Acrobat installed on your system to do this)
Littel-Jax® COMMERCIAL PHONE JACKS
2- and 3-CONDUCTOR
Littel-Jax phone jacks mate with standard commercial phone plugs and are available
with .25 inch and .21 inch inside diameter bushings.
MIL Littel-Jax® PHONE JACKS
2- and 3-CONDUCTOR MIL-SPEC, MIL-J-641 (E)
MIL jacks mate with MIL-type phone plugs with .25 inch (6.35mm) or .21 inch (5.34mm)
diameter bushings. Numbers C11 and C12B have a non-turn locating pin which keys the
jack to the mounting surface. For low contact resistance applications, jack number C12A
has fine silver contacts on shunts and tip springs.
MOUNTING
Chassis/Panel:
See Mounting Data drawing below; small
hole is required only for jacks numbers C11 and C12B
with non-turn locating pin.
Maximum Panel Thickness:
.156 inch (4mm) for standard
.276 inch (7mm) long bushing; .25 inch (6.35mm) for .375
inch (9.5mm) long bushing.
NOTE:
For panels thicker than .25 inch see Thick Panel
Phone Jax.
Insulated Mount:
See drawing. S1028 flatwasher and
Part Number S1029 shoulder washer must be
ordered separately for mounting in .437 inch diameter hole.
NOTE:
See Hi-D Jax® for jack specifically designed
for insulated mounting without additional washers.
PC Board Mounting:
See Recommended PC Board Layout
drawing below for jacks with PC terminals. Recommended
PC board thickness is .062 inches.
Mounting Centers:
1.188 inch (30mm) recommended.
Centers may vary with jack selected, for example, Number
11 mounts on .813 inch (20.6mm) and 14B mounts on
1.125 inch (28.6mm) minimum centers.
PREFIX OPTIONS
Blank-
1/4" Commercial
C-
Accepts Mill Plug
FA-
.205" Faston Terminals
FAL-
.205" Faston Terminals
and .375" Long Bushing
L-
.375" Long Bushing
PC-
PC Terminals
S-
Accepts .206 Diameter Plugs
SERIES
Jack 1-Littel Jax®
CIRCUITRY
1- I
2A- III
2B- IV
3- V
3A- VI
3B- VII
3E- IX
4B- XII
TWO CONDUCTOR PART NUMBERS
Part Number
Description
Jack Schematic
1
Typical Mating
Plug
11
C11
FA11
FAL11
L11
12A
C12A
L12A
PC12A
13
13A
13E
12B
L12B
C12B
13B
14B
S11
S12A
S12B
S13B
Open circuit
MIL Number M641/6-1
.205 inch FASTON terminal
.375 inch long bushing
.205 FASTON terminal
.375 inch long bushing
Tip shunt
MILNumber M641/12-1
.375 inch long bushing
PC board mount
Isolated "make" circuit
Transfer circuit
Isolated "break" circuit
Double open circuit
.375 inch long bushing
MIL number M641/5-1,
.210 inch inside diameter
Tip shunt
Double closed circuit
2 conductor
2 conductor
3 conductor
3 conductor
I
I
I
I
I
III
III
III
III
V
VI
IX
IV
IV
IV
VII
XII
I
III
IV
VII
250
440
250
250
250
250
440
250
250
250
250
250
267
267
480
267
267
S250
S250
S267
S267
THREE CONDUCTOR PART NUMBERS
PART NUMBERS (.210 inch inside diameter bushing)
1 Refer to jack schematics on pages 65 and 66. Other circuits are available; contact
factory.
SPECIFICATIONS
MECHANICAL
Life:
Commercial Jacks - 10,000 insertion/withdrawal
cycles, minimum.
Military Jacks - 20,000 insertions/withdrawals, minimum.
Mechanical Shock:
Military Jacks - Per MIL-STD 202,
method 213, Test Condition H (75g).
Vibration:
Military Jacks - Per MIL-STD-202, method 213,
(10-55 Hz).
Insertion/Withdrawal Forces:
(see charts below)
Commercial Jacks
Plug Diameter (inches) .210 .250
Insertion (maximum)
7 lb. 7 lb.
Withdrawal (minimum) 1 lb. 1 lb.
Military Jacks
Part Number
Insertion (maximum)
C11 C12A C12B
6 lb. 7 lb.
6 lb.
5 lb.
Withdrawal (minimum) 2 lb. 3 lb. 1.5 lb.
Withdrawal (maximum) 7 lb. 7 lb.
ELECTRICAL
Contact Resistance:
Commercial Jacks - .030 ohms
maximum (initial), .050 ohms maximum (after humidity,
durability exposure). Per MIL-STD-202E.
Military Jacks - .010 ohms maximum (initial), .020 ohms
maximum (after life), .10 ohms maximum (after salt spray).
