1N4148 signal diode
The 1N4148 is a standard silicon switching signal diode. It is one of the most popular and long-lived switching diodes because of its dependable specifications and low cost. Its name follows the JEDEC nomenclature. The 1N4148 is useful in switching applications up to about 100 MHz with a reverse-recovery time of no more than 4 ns.
As the most common mass-produced switching diode, the 1N4148 replaced the older 1N914. They differ mainly in their leakage current specification, which at 25°C is:
- 1N914: 25 nA at -20 V
- 1N4148: 5 µA at -75 V
Maximum leakage for both types at 150°C is 50 µA at -20V.
Today manufacturers produce the 1N4148 and sell it as either part number. It was second-sourced by many manufacturers; Texas Instruments listed their version of the device in an October 1966 data sheet. These device types have an enduring popularity in low-current applications.
The JEDEC registered part numbers 1N4148 and 1N914 are diodes in an axial package. Diodes with similar properties are available in surface-mount packages.
- Through-hole package
- Surface-mount packages
- LL4148 in MiniMELF package.
- 1N4148W in SOD-123 package.
- 1N4148WS in SOD-323 package.
- 1N4148WT in SOD-523 package.
Absolute maximum ratings (stress ratings, consult datasheet for recommended ratings)
- VRRM = 100 V (maximum repetitive reverse voltage)
- IO = 200 mA (average rectified forward current)
- IF = 300 mA (DC forward current)
- If = 400 mA (recurring peak forward current)
- IFSM = 1 A at 1 s pulse width; 4 A at 1 µs pulse width (non-repetitive peak forward surge current)
Electrical and thermal characteristics
- VF = 1 V at 10 mA (maximum forward voltage)
- VR = 75 V at 5 µA; 100 V at 100 µA (minimum breakdown voltage and reverse leakage current)
- trr = 4 ns (maximum reverse-recovery time)
- PD = 500 mW (maximum power dissipation)
- 1N914 Datasheet; DO-35 Package; Vishay.
- Michael Predko (2004). 123 robotics experiments for the evil genius. McGraw-Hill Professional. p. 93. ISBN 978-0-07-141358-9.
- The Transistor and Diode Data Book, Texas Instruments Incorporated, publication no. CC-413 71243-73-CSS, no date, page 10-34
- Jonathan Oxer; Hugh Blemings (2009). Practical Arduino: Cool Projects for Open Source Hardware. Apress. p. 10. ISBN 978-1-4302-2477-8.
Small "signal" diodes like the venerable 1N4148/1N914 can cope with about 200mA...
- Michael Gasperi; Philippe E. Hurbain; Philippe Hurbain (2009). Extreme NXT: Extending the Lego Mindstorms NXT to the Next Level (2nd ed.). Apress. p. 211. ISBN 978-1-4302-2453-2.
You could use a 1N4002, but the 1N4148 is smaller and more appropriate for the current...
- 1N4148 Datasheet; DO-35 Package; Fairchild.
- 1N4148 Datasheet; DO-35 Package; Kingtronics.
- 1N4148 Datasheet; DO-35 Package; Vishay.
- LL4148 Datasheet; MiniMELF Package; Kingtronics.
- 1N4148W Datasheet; SOD-123 Package; Diodes Inc.
- 1N4148W Datasheet; SOD-123 Package; MCC.
- 1N4148W Datasheet; SOD-123 Package; Vishay.
- 1N4148WS Datasheet; SOD-323 Package; Diodes Inc.
- 1N4148WS Datasheet; SOD-323 Package; Vishay.
- 1N4148WT Datasheet; SOD-523 Package; Diodes Inc.
- 1N4148X Datasheet; SOD-523 Package; MCC.
- "1". The Semiconctor Data Library (Fourth ed.). Motorola Semiconductor Products, Inc. 1973. p. 73.
- Historical Databooks
- Transistor and Diode Data Book (1973, 1236 pages), Texas Instruments
- Diode Data Book (1978, 210 pages), Fairchild
- Rectifiers and Zener Diodes Data Book (1988, 508 pages), Motorola
- Rectifier Device Data Book (1995, 410 pages), Motorola
|Wikimedia Commons has media related to