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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 through-hole mounting. This is useful for breadboarding of circuits. A surface mount device, 1N4148WS, is available in a plastic SOD package.〔http://www.diodes.com/products/catalog/detail.php?item-id=2801#5〕 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.〔''The Transistor and Diode Data Book'', Texas Instruments Incorporated, publication no. CC-413 71243-73-CSS, no date, page 10-34〕 These device types have an enduring popularity in low-current applications.〔 〕〔 〕 ==Specifications== *VRRM = 75-100 V — maximum repetitive reverse voltage *IO = 75-200 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 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1N4148」の詳細全文を読む スポンサード リンク
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