Bayonet Cap Fitting Sizes

Bayonet bases or caps are often abbreviated to ba often with a number after.

Bayonet cap fitting sizes.

It follows that the larger the cap the great the wattage and heat the lamp can withstand. A range bc light bulbs also known as b22 and bayonet cap available in various sizes colour temperatures styles lumens and technologies from trusted trade brands. Edison screw es is a standard lightbulb socket for electric light bulbs. The bulbs have right hand threaded metal bases caps which screw into matching threaded sockets lamp holders.

Gu10 the letter g indicates a bi pin or two pin base but because gu10s have a twist and lock mechanism they are classified as a type of bayonet. For bulbs powered by ac current the thread is generally connected to neutral and the. The lower case letter s or d specifies whether the bulb has single or double contacts. Ba15 a 15 mm base can also be referred to as sbc standing for small bayonet cap.

Suitable for commercial and residential applications they are often used in ceiling fittings in the home. They are used in a variety of lighting around the home and one of the most common types of fittings. The most popular es or e27 fitting is 27mm diameter and is widely used in uk and europe. In this case you will need to look closely at the fitting type and do a quick diameter measurement.

If your fittings are empty. Therefore gu4 and gu5 3 fittings are commonly found on low voltage wattage lamps and often have a push fit action. Bayonet cap bulbs use a twist and lock action to secure into the fitting. Gu10 fittings are distinctive by their twist and lock fitting action and are common in domestic applications.

It was developed by thomas edison patented in 1881 and was licensed in 1909 under general electric s mazda trademark. This cap is the standard 27mm diameter screw cap for uk 240v light bulbs not to be confused with e26 which is a 26mm size and is designed for the 120v us market. Most standard light fittings will take either 27 screw cap edison bulbs e27 or 22 inch bayonet cap bulbs b22d. See our range of es e27 capped lamps here.