2.50mm JST-XH top-entry (vertical) male PCB connectors

JST connectors are electrical connectors manufactured to the design standards originally developed by J.S.T. Mfg. Co. (Japan Solderless Terminal).[1] JST manufactures numerous series (families) and pitches (pin-to-pin distance) of connectors.[2][3]

JST connectors are used in many types of products, and commonly used by electronics hobbyists and consumer products for rechargeable battery packs, battery balancers, battery eliminator circuits, 3D printers, and radio controlled servos.[4]

The term "JST" is sometimes incorrectly used as a vernacular term meaning any small white electrical connector mounted on PCBs.

Connector series

JST manufactures a large number of series (families) of connectors.[2] The PCB (wire-to-board) connectors are available in top (vertical) or side (horizontal) entry, and through-hole or surface-mount.

Wire-to-board connectors
JST seriesPin-to-pin pitchPin rowsCurrent
(Amp)		Voltage
(Volt)		Wire size
(AWG)		ShroudLockNotesDatasheet
VH [5]
3.96 mm (0.156 in)
1
10
250
22 to 16
Yes/NoYesUnshrouded seems to be more popular than shrouded.JST VH
RE [6]
2.54 mm (0.100 in)
1
2
250
30 to 24
NoNoSimilar to female "DuPont" connectors and male pin headers. RF series is double row.[7]JST RE
EH [8]
2.50 mm (0.098 in)
1
3
250
32 to 22
YesNoNot 0.1-inch pitch.JST EH
XA [9]
2.50 mm (0.098 in)
1
3
250
30 to 20
YesYesNot 0.1-inch pitch.JST XA
XH [10]
2.50 mm (0.098 in)
1
3
250
30 to 22
YesYesNot 0.1-inch pitch. Used by many radio control (R/C) batteries.JST XH
PA [11]
2.00 mm (0.079 in)
1
3
250
28 to 22
YesYesUsed by FMA Cellpro R/C battery chargers.JST PA
PH [12]
2.00 mm (0.079 in)
1
2
100
32 to 24
YesNoMany stepper motors. Compatible with KR (IDC), KRD (IDC), CR (IDC) series.[13][14][15]JST PH
ZH [16]
1.50 mm (0.059 in)
1
1
50
32 to 26
YesNoCompatible with ZR (IDC) and ZM (crimp) series.[17][18]JST ZH
GH [19]
1.25 mm (0.049 in)
1
1
50
30 to 26
YesYesNot 0.05-inch pitch. Sometimes confused with Molex PicoBlade.[20]JST GH
SH [21]
1.00 mm (0.039 in)
1
1
50
32 to 28
YesNoCompatible with SR (IDC) and SZ (IDC) series.[22]JST SH
Wire-to-wire connectors
JST seriesPin-to-pin pitchPin rowsCurrent
(Amp)		Voltage
(Volt)		Wire size
(AWG)		FeaturesNotesDatasheet
RCY [23]
2.50 mm (0.098 in)
1
3
250
28 to 22
LockingUsed in radio control (R/C), also known as BEC or P connector. Commonly found on small models, toys, and small LiPo packs.JST RCY
SM [24]
2.50 mm (0.098 in)
1
3
250
28 to 22
Locking, High forceUsed in some RGB LED decorative light strips.JST SM

Connector soldering

A majority of JST through-hole headers can't withstand the temperatures required for reflow soldering, because the plastic has a lower melting point since they were designed for wave soldering methods. Some JST surface-mount headers are designed to handle higher temperatures of reflow soldering.[25]

Connector confusion on the internet

End-users and 3rd-party sellers on eBay often describe connectors by their wrong name thus perpetuating confusion of the exact series of a specific connector. It is very common in blogs and websites to incorrectly name a specific connector only by the name of the manufacturer.

To minimize confusion, it is best to describe a connector using: the manufacturer's name, exact connector series, and optionally the pitch, such as "JST-XH" or "JST-XH-2.50mm" or "2.50mm JST XH-series" or other variations.

The official J.S.T. Co. website has a tool which allows users to check certain models for their authenticity and specifications.[26]

Note: Some 2.50 mm parts are incorrectly sold on the internet as 2.54 mm (0.100 in), and the 1.25 mm parts as 1.27 mm (0.050 in).

See also

References

  1. ↑ "JST Corporate Profile and History". JST. Archived from the original on 27 November 2016. Retrieved 13 June 2017.
  2. 1 2 "List of JST connector series; JST". Archived from the original on 2020-11-12. Retrieved 2013-08-31.
  3. ↑ Search by connector application; JST.
  4. ↑ "JST" connector confusion - the real story; rcgroups blog.
  5. ↑ JST VH-series webpage.
  6. ↑ JST RE-series webpage.
  7. ↑ JST RF-series webpage.
  8. ↑ JST EH-series webpage.
  9. ↑ JST XA-series webpage.
  10. ↑ JST XH-series webpage.
  11. ↑ JST PA-series webpage.
  12. ↑ JST PH-series webpage.
  13. ↑ JST KR-series webpage.
  14. ↑ JST KRD-series webpage.
  15. ↑ JST CR-series webpage.
  16. ↑ JST ZH-series webpage.
  17. ↑ JST ZR-series webpage.
  18. ↑ JST ZM-series webpage.
  19. ↑ JST GH-series webpage.
  20. ↑ JST Is Not A Connector
  21. ↑ JST SH-series webpage.
  22. ↑ JST SR/SZ-series webpage.
  23. ↑ JST RCY-series webpage.
  24. ↑ JST SM-series webpage.
  25. ↑ JST through-hole soldering; Official JST blog.
  26. ↑ "Choosing the Right JST Connector". DronesEtc. Archived from the original on 4 March 2016. Retrieved 13 August 2015.
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