1/4" Jack - Switchcraft, Mono, shunt tip

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Switchcraft Type 12A Littel-Jax shorting type phone jack. The switched terminal is normally closed and is usually connected to ground to eliminate hum when unplugged. Includes nut and washer
- Type 12A
- 0.275" bushing length (standard) or 0.375" bushing length (long)
- Mates with standard ¼" plugs and is available with 0.25" inside diameter bushing.
- Mono 2-Conductor.
- Includes nut and washer
- Tip is shunt
Mounting Bushing | Nickel-plated copper alloy. |
Insulation | Rigid plastic |
Springs | Special copper alloy. Fine silver contacts |
Sleeve Terminal | Copper alloy |
Hardware | Supplied with one copper alloy nickel-plated hex nut, and one copper alloy nickel-plated washer |
Switching Diagram for Long (0.375"):

Switching Diagram for Standard (0.275"):

SKU:
W-SC-12A
Item ID:
004913
Brand:
Switchcraft
RoHS Compliant
Bushing Length | Our Part Number | UPC/EAN | Switchcraft Part Number |
---|---|---|---|
Standard (0.275") | W-SC-12A | 609722127080 | 12A |
Long (0.375") | W-SC-L12A | 609722127288 | L12A |
Chassis Hole Diameter | Long (0.375") version | W-SC-L12A | 0.375 in. |
Item Diameter | 0.75 in. | ||
Item Length | Long (0.375") version | W-SC-L12A | 1.115 in. |
Standard (0.275") version | W-SC-12A | 1.015 in. | |
Mounting Hole Diameter | Standard (0.275") version | W-SC-12A | 0.0375 in. |
Plug Diameter | 0.25 in. |
Packaging Dimensions | Long (0.375") version | W-SC-L12A | 1.3 in. × 0.9 in. × 0.8 in. |
Standard (0.275") version | W-SC-12A | 1.3 in. × 0.9 in. × 0.9 in. | |
Weight (Packaging) | Long (0.375") version | W-SC-L12A | 0.023 lbs. |
Standard (0.275") version | W-SC-12A | 0.022 lbs. |
W-SC-L12A - Long (0.375") version | Chassis Hole Diameter | 0.375 in. |
Item Diameter | 0.75 in. | |
Item Length | 1.115 in. | |
Plug Diameter | 0.25 in. | |
W-SC-12A - Standard (0.275") version | Item Diameter | 0.75 in. |
Item Length | 1.015 in. | |
Mounting Hole Diameter | 0.0375 in. | |
Plug Diameter | 0.25 in. |
![]() | W-SC-12A |
![]() | W-SC-12A |
![]() | W-SC-L12A |
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Specifications, Files, and Documents
Questions and Answers
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1 answers
What are the electrical specs (e.g. watts, etc.) for this jack...I want to use this for an input jack to my speaker cabinet.
Asked by Anonymous on March 23rd, 2018.
Our information from the manufacturer has these rated at 1 A, 25 V DC.
Product Reviews
There are certain instances when you don't have enough depth for a regular 1/4" jack, and that's where the longer bushing (3/8") is the perfect solution. And you can never go wrong with Switchcraft parts. They're always dependable.
Excellent high quality jacks that I use on all my amp builds. Highly recommended.
switchcraft quality and the long thread shaft I needed for my radio build. great!
These switches fit perfectly in my 1965 fender bassman. The only difference is the originals had only two solder points. These have six. You just wire on one side of the switch, leave the other side blank.
Great 1/4" jack. The best out there IMHO.
These are very high quality and will last years
You can alway count on Switchcraft, there are cheap units out there , and are not worth buying, these are worth their “salt”
Quality jack. Would like to show a picture of installation in my amp chassis.
best jack in the industry, still!!!
I've been servicing electronics professionally for over 35 years now, and in that time have replaced well over a thousand jacks i'm sure. I have always replaced cheap, inferior jacks with high quality Switchcraft jacks, because nothing sucks more than having to explain to a customer that their amp failed again during their show because I was trying to save them 50 cents by using Chinese garbage. They're so beautifully made, that even Neutrik hasn't been able to improve them.