Edison screw

Edison screw

The Edison screw fitting is a system of light bulb connectors, developed by Thomas Edison in 1909 under the Mazda trademark. The designation E"xx" refers to the diameter in millimeters, e.g. E12 has a diameter of 12 mm.

In the US the standard size for general purpose lamps is E26. Other base sizes are used for small lamps, such as E12 for candelabra fixtures and E10 on some Christmas lights. E17 is also common, especially in some table lamps.

In countries which use 230-240 volts AC domestic power, E27 and E14 are the most common sizes, although the Bayonet mount is also used.

Larger sizes (E39, E40) are used for higher powered lighting, generally for lamps of over 250 watts.

Some adapters for wall outlets use an Edison screw.

Edison screw cap fittings

ee also

*Bipin
*Bayonet mount
*MR16
*GU10
*Kovar material for joining bulb glass to metal


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  • screw base — srieginis lizdas statusas T sritis radioelektronika atitikmenys: angl. screw base; screw cap; screw socket vok. Edisonfassung, f; Schraubsockel, m rus. резьбовой цоколь, m pranc. culot à vis, m; culot Edison, m; culot fileté, m …   Radioelektronikos terminų žodynas

  • screw cap — srieginis lizdas statusas T sritis radioelektronika atitikmenys: angl. screw base; screw cap; screw socket vok. Edisonfassung, f; Schraubsockel, m rus. резьбовой цоколь, m pranc. culot à vis, m; culot Edison, m; culot fileté, m …   Radioelektronikos terminų žodynas

  • screw socket — srieginis lizdas statusas T sritis radioelektronika atitikmenys: angl. screw base; screw cap; screw socket vok. Edisonfassung, f; Schraubsockel, m rus. резьбовой цоколь, m pranc. culot à vis, m; culot Edison, m; culot fileté, m …   Radioelektronikos terminų žodynas

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