JST Board to Board and Wire to Board LEB Connectors The JST LEB Connector 4.0 mm pitch Board to Board or Wire to Board System is low profile with a PCB height of only 2.7 mm suitable for LED lighting. The LEB Connector System has a secure, polarising locking mechanism between the wire housing and PCB header or PCB Plug and Receptacle. The Fork type contacts of the LEB Connector System feature high contact pressure and have a long mating stroke which allows them to cater for thermal expansion of the PCBs. The LEB Connector System also absorbs some misalignment between PCBs in the pitch direction. All models are highly reliable and excellent quality. Contacts are supplied crimped to 26 AWG blue UL1061 cable.