WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

WEET 500mW LL4148 Diode Description

A diode is a device which allows current flow through only one direction. That is the current should always flow from the anode to the cathode. LL4148 is a Silicon Epitaxial planar diode with an identification of cathode band(which is easy to indentify by the blacking ring mark from the filler in the glass package), comes in glass package version. It has high conductance and high reliability. The specialty of this diode is its fast recovery time of 8ns to 4ns only at a forward current of 300mA, hence this diode is used in places where extremely fast switching is involved. The main use of this diode is for extreme fast switches. LL4148 is used in various projects like heat monitoring, detecting the state of LED to control another circuit and many other electronic circuits

WEET Fast Switching Speed Diode LL4148 Features

Glass package version for high reliability

Available in both Through-hole and Surface mount versions

Conductance is also high

Silicon epitaxial planar diode

RoHS and REACH compliant

Electrical data identical with the devices 1N4148 and 1N4448 respectively

MiniMELF SOD-80 LL-34 Glass Case 

Anode,Current always Enters through Anode

Cathode,Current always Exits through Cathode

The black is the color ring, the main ingredients are  ink

The red one is Dumex, a kind of alloy material.

WEET Samll Signal Fast Switching Diode 500mW LL4148 Applications

Extreme fast switches

Can be used to prevent reverse polarity problem

Protect Power electronic switches that are operating with high switching frequency.

Used as a protection device

Current flow regulators