What is 1N4148WS?
This is a small signal switching diode that is commonly used in electronic circuits for a wide range of applications. It is a surface mount version of the 1N4148 diode, which is a general purpose silicon diode that has been in use for many decades. The “WS” in the part number stands for “winding surface”, indicating that the diode has a flat surface for ease of mounting on a printed circuit board.
Marking : S1
Function: Small Signal Diode
Package: SOD-323 Flat Lead
Manufacturer: Fairchild Semiconductor
Fairchild Semiconductor Corporation, a semiconductor manufacturing company, was acquired by ON Semiconductor Corporation on September 18, 2016.
Image and Pinouts:
Description
The 1N4148WS has a maximum forward current rating of 300mA, making it suitable for use in power supply and switching circuits. It also has a fast switching speed of 4ns, which makes it ideal for use in high-speed applications such as pulse generators, signal processing, and data transmission circuits. The diode has a high peak reverse voltage of 100V and low reverse current, which makes it suitable for use in voltage regulation and protection circuits.
Features
1. General Purpose Diodes
2. Fast Switching Device (TRR< 4.0ns)
3. Very Small and Thin SMD Package
4. Moisture Level Sensitivity 1
5. Pb-free Version and RoHS Compliant
6. Matte Tin (Sn) Lead Finish
7. Green Mold Compound
Advantages Vs Disadvantages
Advantages:
1. Small size and low cost make it widely available and commonly used in electronic projects and circuits.
2. Fast switching speed (4ns) makes it suitable for use in high-speed applications.
3. High peak reverse voltage (100V) and low reverse current make it suitable for use in voltage regulation and protection circuits.
4. High forward current rating (300mA) makes it suitable for use in power supply and switching circuits.
Disadvantages:
1. Low maximum average rectified current (150mA) may limit its use in high current applications.
2. The maximum power dissipation of 500mW may limit its use in high power applications.
3. The high forward voltage drop (typically 1V) may be a concern in low voltage applications.
Absolute Maximum Ratings
1. Non-Repetitive Peak Reverse Voltage : VRSM = 100 V
2. Repetitive Peak Reverse Voltage : VRRM = 75 V
3. Repetitive Peak Forward Current : IFRM = 300 mA
4. Continuous Forward Current : IO = 150 mA
QnA
Q1: What is the difference between the 1N4148 and 1N4148WS diodes?
A1: The 1N4148WS is a surface mount version of the 1N4148 diode. The WS in the part number stands for “winding surface”, indicating that the diode has a flat surface for ease of mounting. The electrical specifications of the two diodes are identical.
Other data sheets are available within the file: 1N4448WS, 1N914BWS
1N4148WS Datasheet PDF Download
