3.5mm Eurorack Jacks

£0.37£13.59 (Excl. VAT)

There is no minimum order quantity and pricing is per single jack. Please also note that you now need to buy the correct amount of nuts and washers separately, they are no longer included in the jack price.

BULK DISCOUNTS ON 50, 100 and 500 pieces. See below for details.

Don’t forget to buy nuts and washers!

NEW! 729JH jack sockets can be found HERE

£0.37 (Excl. VAT)

In stock

£0.49 (Excl. VAT)

In stock

£0.47 (Excl. VAT)

In stock

Read more£1.69 (Excl. VAT)

Out of stock

£13.59 (Excl. VAT)

In stock

£1.69 (Excl. VAT)

In stock

£13.59 (Excl. VAT)

In stock

£1.69 (Excl. VAT)

In stock

£12.49 (Excl. VAT)

In stock

£0.49 (Excl. VAT)

In stock

£0.49 (Excl. VAT)

In stock

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SKU: Group_MECH_JACK_3.5 Categories: , , , Brand:



NOTE FOR PCB DESIGNERS – If you were previously using the PJ301CM we recommend redesigning for STEREO THONKICONN instead. If you were previously using right angled PJ302M we recommend designing for the new 729JH right angled jack socket range instead, which can be found HERE. Neither of these alternatives are drop in replacements, the PCB will need a footprint alteration.


KiCAD library for 3.5mm Jacks: https://github.com/clacktronics/AudioJacks

BULK PRICES – These prices do do include VAT for UK, EU or Norway.

You can see the final cost of the volume breaks by adding the parts to your cart.

Email us if you want more than 2500 pieces

1+ £0.37 £0.49 £0.49  £0.47
50+ £0.26 £0.34 £0.39  £0.33
100+ £0.24 £0.32 £0.34  £0.31
500+ £0.23 £0.30 £0.30  £0.29
1000+ £0.22 email us email us  £0.28

THONKICONN NEW – WQP518MA (aka PJ398SM and PJ301M-12)

Thonkiconn Jack Datasheet

Thonkiconn Eagle v6 Library Part – thonkiconn.lbr

Thonkiconn Eagle v5.7+ Library Part – thonkiconn_eagle_v5.lbr

Thonkiconn WQP518MA (aka PJ398SM and PJ301M-12) is an improved version of the original Thonkiconn with a more reliable bushing – the footprint is the same.

The only difference between the old and new is, the former has a plastic semi circle round tab, and the latter has a metal rectangle tab, but the height of these two tabs are same.

The mechanism is identical to the ‘Erthenvar’ jack type (PJ301BM), it’s primary purpose is as a direct replacement of the popular Kobiconn 3.5mm jack but with a 100% vertically integrated footprint, i.e. no perpendicular ground pin. A really great bonus of these parts is they fit neatly into breadboard/stripboard/veroboard.

All materials used are RoHS compliant.

NOTE: Please refer to the notes about the PCB HOLE in the Thonkiconn Jack Datasheet.
It is advisable to drill a 3mm hole in the PCB directly under the jack barrel centre or avoid routing traces or ground plane in that area.



This is a stereo version of the Thonkiconn jack which replaces the switch with the sleeve signal connector. The body of the jack is very slightly wider than the mono Thonkiconn, otherwise the PCB footprint is the same.


Known commonly as ‘Flight of Harmony’ or ‘Erthenvar’ jacks, this popular component is a vertical mount 3.5mm switching phone jack with a threaded metal bushing.

This is the latest version of the part, redeveloped by the manufacturer in November 2012 to provide very reliable switch contacting.

Material:PBT housing, beryllium copper spring, brass curve piece.

  • Temperature Range: -30 deg c~70 deg c?
  • Rated Current:0.5A
  • Contact Resistance:0.03 Ohm
  • Rated Voltage:30V AC/DC
  • Test Voltage:500V/60s
  • Insulation Resistance: 100MOhm
  • Insertion Force:5-20N
  • Withdrawal Force:4-20N


PJ301CM – Not recommended for new designs.


The PJ302M is a  horizontal or right angled mount 3.5mm switching mono phone jack.

It can simply be converted to a non switching jack as shown below. Various euro modules use these jacks, including the 4ms RCD and SCM modules.

All materials used are RoHS compliant.




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