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 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 a 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
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. JST XH
PA [8]
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 [9]
2.00 mm (0.079 in)
1
2
100
32 to 24
Yes No Compatible with KR, KRD, CR series.[10][11][12] JST PH
ZH [13]
1.50 mm (0.059 in)
1
1
50
32 to 26
Yes No Compatible with ZR, ZM series.[14][15] JST ZH
GH [16]
1.25 mm (0.049 in)
1
1
50
30 to 26
Yes Yes Some people confuse with Molex PicoBlade.[citation needed] JST GH
SH [17]
1.00 mm (0.039 in)
1
1
50
32 to 28
Yes No Compatible with SR, SZ series.[18] JST SH
RE [19]
2.54 mm (0.100 in)
1
2
250
30 to 24
Yes Yes 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 [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. JST RCY
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. 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).[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.

The official J.S.T. Co. website has a tool which allows users to check certain models for their authenticity and specifications.[24]

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