Is the round head pigtail fc or sc?

　　Round head pigtail is a FC type fiber optic connector. The following is a detailed introduction to FC round head pigtail:

　　I. Definition and characteristics

　　FC is the abbreviation of Ferrule Connector, indicating that its external reinforcement is made of metal sleeves and fastened by screws.

　　The FC type pigtail joint is round with thread, which belongs to the metal joint. The metal joint can be plugged and unplugged more times than the plastic joint.

　　The advantages of FC pigtail are its reliability and dust resistance, but the installation time is slightly longer.

　　Application scenarios

　　FC round threaded joints (most commonly used on Distribution Frames) are generally identified as FC/PC, and PC represents microspherical grinding and polishing.

　　FC round head pigtail is mainly used in ODF racks and ODF boxes.

　　In the early stage, FC round pigtail was also often used on PDH optical transceivers.

　　III. Comparison with other types

　　SC pigtail: SC is Square The abbreviation of Connector, its shell is rectangular, the end face of the pin is mostly PC or APC grinding method, and the fastening method is to use the plug-in pin latch type without rotation. SC pigtail is inexpensive, easy to plug and unplug, SMall fluctuation of intervention loss, high compressive strength, high installation density, and is often used in network equipment.

　　LC pigtail: The LC type connector is developed by the famous Bell (Bell) Institute and is made of a modular jack (RJ) latch mechanism that is easy to operate. The size of the pins and sleeves of LC pigtail is half of the size used by ordinary SC, FC, etc., which is 1.25MM, which can increase the density of fiber optic connectors in fiber optic distribution frames. LC pigtail is often referred to as "small square head" pigtail.

　　Overall, the round head pigtail is a FC type fiber optic connector, which has the characteristics of metal joints, reliable dust protection, and is widely used in communication equipment.