JST is not a specific type or size of connector, but instead it’s an acronym for Japan Solderless Terminal, which is the long form of the company name J.S.T. Mfg. Co., Ltd..JST manufactures numerous series (families) and pitches (pin-to-pin distance) of connectors.
JST Mfg. Co., Ltd. was established in 1957 as the first Japan manufacturer of solderless terminals. JST is one of the top ten connector manufacturers in the world with annual sales of approximately 100 billion. Its headquarters is located in Doshomachi, Chuo-ku, Osaka, Japan.
JST manufactures a large number of series (families) of connectors. The PCB (wire-to-board) connectors are available in top (vertical) or side (horizontal) entry, and through-hole or surface-mount.
The following tables list JST connector series that are commonly used by electronics hobbyists and consumer products for rechargeable battery packs, battery balancers, battery eliminator circuits, and radio controlled servos.