JST connector

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

JST connector is an electrical connector that is manufactured 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 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 commonly and incorrectly used as a vernacular term meaning a small white electrical connector mounted on PCBs inside products manufactured from Asia.

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
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.
EH [6]
2.50 mm (0.098 in)
1
3
250
32 to 22
Yes No  
XH [7]
2.50 mm (0.098 in)
1
3
250
30 to 22
Yes No Used by many R/C batteries. Not 0.1" pitch.
PA [8]
2.00 mm (0.079 in)
1
3
250
28 to 22
Yes Yes Used by FMA Cellpro R/C battery chargers.
PH [9]
2.00 mm (0.079 in)
1
2
100
32 to 24
Yes No Compatible with KR, KRD, CR series.[10][11][12]
ZH [13]
1.50 mm (0.059 in)
1
1
50
32 to 26
Yes No Compatible with ZR, ZM series.[14][15]
GH [16]
1.25 mm (0.049 in)
1
1
50
30 to 26
Yes Yes Some people confuse with Molex PicoBlade.[17]
SH [18]
1.00 mm (0.039 in)
1
1
50
32 to 28
Yes No Compatible with SR, SZ series.[19]
Wire-to-Wire Connectors
JST
Series
Pin-to-Pin
Pitch
Pin
Rows
Current
(Amp)
Voltage
(Volt)
Wire Size
(AWG)
Features Notes
RCY [20]
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.
SM [21]
2.50 mm (0.098 in)
1
3
250
28 to 22
Locking, High force Used in some RGB LED decorative light strips.

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).[22]

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.[23]

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.

In recent years, it is preferred to use millimeter (mm) instead of inches for pin-to-pin pitch distance. 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]

External links[edit]

Official
Other