The 1N4148 is a standard silicon switching 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 thru-hole mounting. This is useful for breadboarding of circuits. A surface mount device, 1N4148WS, is available in a plastic SOD package.
As the most common mass produced switching diode, the 1N4148 replaced the older 1N914,which had a 200 times greater leakage current — 5 µA vs. 25 nA. Since leakage is usually an undesirable property, 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 = 100 V — maximum repetitive reverse voltage
- IO = 200 mA — average rectified forward current
- IF = 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
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- Jonathan Oxer and 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, and 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..."
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- Vishay. "1N4148". Data Sheet. Retrieved 2012-09-06.
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- NXP Semiconductors. "1N4148; 1N4448". Data Sheet. Retrieved 2012-09-06.
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