GU10 Ceramic Lamp Holder

Each lamp in addition to other elements of the design is the so-called "chuck" – simply. It's a part of the lamp which is inserted or screwed threaded lamp base. There is a conventional alphanumeric system type designation of the cap, which is shared by all manufacturers of lighting equipment:

XXYYz - where XX is one or two capital letters indicating the type and subtype of the lamp cap,

YY - is a number indicating the diameter of  the connecting portion of the cap or on  the distance between the contact pins of the cap,

Z - lowercase letter indicates the number of contact plates, flexible joints or pins in the basement . 

First Latin capital letter indicates the type of cap:

- The letter B is a pin socket (bayonet)

- Letter E indicates a screw cap, also called Edison Screw

- Letter of the G - pin

- Letter P - focusing

- Letter R - plinth with recessed contact

- Letter S - soffit base

The second capital letter is a subtype of the cap, not common, mainly in the "pin base."

Last lowercase Latin letter:

- S - one contact

- D- two pins

- T - three contacts

- Of q - four pins

- P - five contacts

GU10 ceramic lamp holder is in the lamp socket.  The figures indicate in the distance between the centers of the pins and pins for more of the diameter of the circle on which the center pin. In this case, in the GU10 socket base two pins and the distance between them of 10 mm. Most often this type of lamp used in cap ceiling and accent lighting. In lamps with GU10 base, there are visible thickening at the end of the contacts, for connection to the rotary chuck.