3.5mm Eurorack jack

£0.40 (Excl. VAT)

  • 3.5mm mono Eurorack jack
  • aka – PJ301M-12, Thonkiconn
  • Hex nut and washer included

10 × 9 × 18 mm

169 in stock

Mounting 3.5mm Eurorack Sockets

N8 Eurorack Control Decks provide a grid of JPS cells. Each cell can host a 3.5mm jack socket, 9mm potentiometer, SPDT switch or LED.

PJ-301M-12 / PJ-3001F style jacks are soldered to the Eurorack Control Deck using the vertical “ABC” pads. As these pads can also be used to mount a sub-miniature SPDT switch, make sure to align the socket correctly.

The long shield pin of the PJ-3001F socket should connect to the lower of the two “C” pads. The switch pin to the “B” pad and the tip pin in the upper hole of the “A” pad. Stereo sockets use the same pads, with the “B” pad becoming the ring connection.

The three connections appear at the control deck’s edge connector, as indicated on the rear of the board. A connection reference can also be found on each Eurorack Control Deck page.

Positioning a Thonkiconn style jack an N8 Synth Eurorack Control Deck

N8 pre-drilled Eurorack Panels have 7mm diameter holes to accept a range of components in each position. We recommend using a washer and hex nut to fix 3.5mm jacks to the panel. All our 3.5mm jack sockets ship with a nut and washer. 

For perfect alignment, position jacks and other components on your N8 Eurorack Control Deck and affix the panel using the nuts before soldering.

Check that the jacks are square to the Control Deck and centred in the panel, and adjust as needed before soldering into position.


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