1N4148

1N4148 diodes

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.

History

The 1N4148 replaced the 1N914, which had a much higher leakage current (5 microamps vs. 25 nanoamps). Since leakage is almost never a desirable 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.

Package Type

The 1N4148 comes in a DO-35 glass package for thru-hole mounting. This is extremely useful for breadboarding of circuits. For surface mount applications, the plastic encapsulated SOD package is also available.

Specifications

• V_RRM = 100 V (maximum repetitive reverse voltage)
• I_O = 200 mA (average rectified forward current)
• I_F = 300 mA (maximum direct forward current)
• V_F = 1.0 V at 10 mA.
• I_FSM = 1.0 A (pulse width = 1 sec), 4.0 A (pulse width = 1 µsec) (non-repetitive peak forward surge current)
• P_D = 500 mW (power dissipation)
• T_RR < 4 ns (reverse-recovery time)

Documents

• File:Vishay 1n4148.pdf
• File:Fairchild1N4148.pdf
• File:NXP1N4148 1N4448 5.pdf

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 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... CS1 maint: Multiple names: authors list (link)

http://www.diodes.com/products/catalog/detail.php?item-id=2801#5

"1". The Semiconctor Data Library (Fourth ed.). Motorola Semiconductor Products, Inc. 1973. p. 73.