this 1E is a batch number, not a model number. Only in the SMD components, the device marked by abbreviation has 1E on it, but this component is not necessarily a transistor.

1. Triode, the full name of which should be semiconductor triode, also known as bipolar transistor and transistor, is a current-controlled semiconductor device. Its function is to amplify weak signals into electrical signals with large amplitude, and it is also used as a contactless switch.

2. Transistor is one of the basic components of semiconductor, which has the function of current amplification and is the core component of electronic circuit. Triode is made of two PN junctions which are very close to each other on a semiconductor substrate. The two PN junctions divide the whole semiconductor into three parts, the middle part is the base region, and the two sides are the emitter region and the collector region. The arrangement modes are PNP and NPN.