JST connector

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2.50mm JST-XH top-entry (vertical) male PCB connectors
JST RCY 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, and radio controlled servos.[4]

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

Connector series[edit]

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
Series
Pin-to-Pin
Pitch
Pin
Rows
Current
(Amp)
Voltage
(Volt)
Wire Size
(AWG)
Shroud Lock Notes Datasheet
VH [5]
3.96 mm (0.156 in)
1
10
250
22 to 16
Yes/No Yes Unshrouded seems to be more popular than shrouded. JST VH
EH [6]
2.50 mm (0.098 in)
1
3
250
32 to 22
Yes No   JST EH
XA [7]
2.50 mm (0.098 in)
1
3
250
30 to 20
Yes Yes JST XA
XH [8]
2.50 mm (0.098 in)
1
3
250
30 to 22
Yes No Used by many R/C batteries. Not 0.1" pitch. JST XH
PA [9]
2.00 mm (0.079 in)
1
3
250
28 to 22
Yes Yes Used by FMA Cellpro R/C battery chargers. JST PA
PH [10]
2.00 mm (0.079 in)
1
2
100
32 to 24
Yes No Compatible with KR, KRD, CR series.[11][12][13] JST PH
ZH [14]
1.50 mm (0.059 in)
1
1
50
32 to 26
Yes No Compatible with ZR, ZM series.[15][16] JST ZH
GH [17]
1.25 mm (0.049 in)
1
1
50
30 to 26
Yes Yes Sometimes confused with Molex PicoBlade.[18] JST GH
SH [19]
1.00 mm (0.039 in)
1
1
50
32 to 28
Yes No Compatible with SR, SZ series.[20] JST SH
RE [21]
2.54 mm (0.100 in)
1
2
250
30 to 24
No No Similar to female "Dupont" connectors and male pin headers. JST RE
Wire-to-Wire Connectors
JST
Series
Pin-to-Pin
Pitch
Pin
Rows
Current
(Amp)
Voltage
(Volt)
Wire Size
(AWG)
Features Notes Datasheet
RCY [22]
2.50 mm (0.098 in)
1
3
250
28 to 22
Locking Used 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 [23]
2.50 mm (0.098 in)
1
3
250
28 to 22
Locking, High force Used in some RGB LED decorative light strips. JST SM

Connector soldering[edit]

Lithium polymer battery for Parrot AR.Drone with 4-pin JST-XH female connector (right, facing the camera) and 2-pin mini-Tamiya connector (left).[24]

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[edit]

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. Unfortunately, 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[edit]

References[edit]

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

External links[edit]

Official
Other