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1/4" SHIELDED PHONE JACKS AND SF-JAX® SHORT FRAME JACKS

1. 1/4" SHIELDED PHONE JACK SERIES CN12A
2. 1/4" SHIELDED PHONE JACK SERIES CN12A

click here to download a schematic drawing
(you will need to have Adobe Acrobat installed on your system to do this)

1/4" SHIELDED PHONE JACKS
Shield is assembled as part of the jack; cover "snaps" into place. Shield is designed for Hi Z circuits. Mounting is through a 3/8 inch diameter hole in chassis/panel up to .156 inches thick with hex nut and flat washer (supplied). On special order, jacks with .21 inch inside diameter bushing are available.
SPECIFICATIONS
MATERIAL
Cover and Shield: Copper alloy, nickel-plated.
Cable Entry Insulation: Thermoplastic.

SF-Jax® SHORT FRAME JACKS

Part
No. Cond. Schematic
Number Typical
Mating
Plug MIL Type Contacts Rating Mounting
In. (mm)

24B 3 XII 267 ---- Fine
Silver 3A
125V
AC .375 (9.52)
hole, mounts
in panels up
to .156 (3.96)
thick

25 2 XIII 250 ----

ı53B 3 VII 267 ----

ı54A 2 XI 250 ----

ı54B 3 XII 267 ----

ı55 2 XIII 250 ----

ı-55B 3 XV 482 JJ-095,
M641/14-1

Long spring design reliability with minimum behind-panel depth. Series 50 same as Series 20, except solder lug location requires more depth, but less panel space. Number C55B has MIL type insulation and finish.

TWO CONDUCTOR PART NUMBERS

Part Number
Description
Jack Schematic¹

CN11
Uses Number 11 Littel-Jax® jacks
I

ı CN12A Uses Number 12A Littel-Jax jacks III

ı Special order only. Contact Switchcraft.

THREE CONDUCTOR PART NUMBERS

CN12B
Uses Number 12B Littel-Jax jacks
IV

ı CN13B Uses Number 13B Littel-Jax jacks VII

¹See jack schematics on pages 65 and 66.
² See Plug Section for mating information.
ı Special order only. Contact Switchcraft.

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Part No.	Cond.	Schematic Number	Typical Mating Plug	MIL Type	Contacts	Rating	Mounting In. (mm)
24B	3	XII	267	----	Fine Silver	3A 125V AC	.375 (9.52) hole, mounts in panels up to .156 (3.96) thick
25	2	XIII	250	----
ı53B	3	VII	267	----
ı54A	2	XI	250	----
ı54B	3	XII	267	----
ı55	2	XIII	250	----
ı-55B	3	XV	482	JJ-095, M641/14-1

TWO CONDUCTOR PART NUMBERS
Part Number	Description	Jack Schematic¹
CN11	Uses Number 11 Littel-Jax® jacks	I
ı CN12A	Uses Number 12A Littel-Jax jacks	III
ı Special order only. Contact Switchcraft.

THREE CONDUCTOR PART NUMBERS
CN12B	Uses Number 12B Littel-Jax jacks	IV
ı CN13B	Uses Number 13B Littel-Jax jacks	VII
¹See jack schematics on pages 65 and 66. ² See Plug Section for mating information. ı Special order only. Contact Switchcraft.