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.
The 1N4148 comes in a DO-35 glass package for through-hole mounting, which is useful for breadboarding of circuits. Surface mount devices are available: LL4148 in MiniMELF package, 1N4148W in SOD-123 package, 1N4148WS in SOD-323 package, 1N4148X in SOD-523 package.
As the most common mass-produced switching diode, the 1N4148 replaced the older 1N914. They differ mainly in their leakage current specification at 25°C: 25 nA @ -20V vs. 5 µA @ -75V. with maximum leakage for both at 150°C to be 50 µA @ -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.
- VRRM = 75-100 V — maximum repetitive reverse voltage
- IO = 75-200 mA — average rectified forward current
- IF = 200-300 mA — maximum direct forward current
- VF = 1.0 V at 10 mA.
- IFSM = 1.0 A (pulse width = 1 s), 4.0 A (pulse width = 1 µs) — non-repetitive peak forward surge current
- PD = 500 mW — power dissipation
- TRR < 4 ns — reverse-recovery time
- 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; Vishay.
- 1N4148WS Datasheet; SOD-323 Package; Vishay.
- 1N4148X Datasheet; SOD-523 Package; MCC.
- 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...
- "1". The Semiconctor Data Library (Fourth ed.). Motorola Semiconductor Products, Inc. 1973. p. 73.
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- Historical Data Books
- Transistor and Diode Data Book (1973, 1236 pages), Texas Instruments
- Diode Data Book (1978, 210 pages), Fairchild
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