This is a USB Micro B icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,300 icons, all in the same style and quality.
The icon is a depiction of a micro USB B connector, head on. A rectangle chip with five pins coming out of the bottom is housed inside a angular case. The icon calls to mind a micro USB B connector, a common connector used for many devices and to charge cell phones.