The 1N4148 is a standard

silicon Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid (sometimes considered a non-metal) and semiconductor. It is a membe ...

switching signal

diode A diode is a two-Terminal (electronics), terminal electronic component that conducts electric current primarily in One-way traffic, one direction (asymmetric electrical conductance, conductance). It has low (ideally zero) Electrical resistance ...

. 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 The Joint Electron Device Engineering Council (JEDEC) Solid State Technology Association is a consortium of the semiconductor industry headquartered in Arlington County, Virginia, Arlington, United States. It has over 300 members and is focused ...

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

Texas Instruments announced the 1N914 diode in 1960. It was registered at

Texas Instruments Texas Instruments Incorporated (TI) is an American multinational semiconductor company headquartered in Dallas, Texas. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog ...

no later than 1961, and was second-sourced by 11 manufacturers that same year. The 1N4148 was registered at

in 1968 as a silicon switching signal diode for military and industrial applications. It was second-sourced by many manufacturers;

listed their version of the device in an October 1966 data sheet. The 1N914 and 1N4148 have an enduring popularity in low-current applications.

Overview

As the most common mass-produced switching diode, the 1N4148 replaced the older 1N914. They can be used interchangeably, and are cross-reference replacements for each other. They differed mainly in their leakage current specification, however, today most manufacturers list common specifications. For example,

Vishay Vishay Intertechnology, Inc. is an American manufacturer of discrete semiconductors and passive electronic components founded by Polish-born businessman Felix Zandman. Vishay has manufacturing plants in Israel, Asia, Europe, and the Americas ...

lists the same leakage current for both parts: * 25 nA at -20 V, 25°C * 5 μA at -75 V, 25°C * 50 μA at -20 V, 150°C

Packages

The JEDEC registered part numbers 1N914 and 1N4148 were originally only available in an axial package, but over time similar parts became available in

surface-mount Surface-mount technology (SMT), originally called planar mounting, is a method in which the electrical components are mounted directly onto the surface of a printed circuit board (PCB). An electrical component mounted in this manner is referred ...

packages too. ;

Through-hole In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either ...

package: * 1N4148 in

DO-35 DO-204 is a family of diode semiconductor packages defined by JEDEC. This family comprises lead-mounted axial devices with round leads. Generally a diode will have a line painted near the cathode end. Dimensions Common variants Several c ...

glass axial package. ;

Surface-mount Surface-mount technology (SMT), originally called planar mounting, is a method in which the electrical components are mounted directly onto the surface of a printed circuit board (PCB). An electrical component mounted in this manner is referred ...

packages: * LL4148 in MiniMELF package. * 1N4148W in

SOD-123 Small Outline Diode (SOD) is a designation for a group of semiconductor packages for surface mounted diodes A diode is a two- terminal electronic component that conducts electric current primarily in one direction (asymmetric conductance) ...

package. * 1N4148WS in

SOD-323 Small Outline Diode (SOD) is a designation for a group of semiconductor packages for surface mounted diodes A diode is a two- terminal electronic component that conducts electric current primarily in one direction (asymmetric conductance) ...

package. * 1N4148WT in

SOD-523 Small Outline Diode (SOD) is a designation for a group of semiconductor packages for surface mounted diodes A diode is a two- terminal electronic component that conducts electric current primarily in one direction (asymmetric conductance) ...

package. Note: Some 1N4148 family surface-mount packages are marked with "T4" text.

Specifications

Absolute maximum ratings (stress ratings, consult datasheet for recommended ratings) * V_RRM = 100 V (maximum repetitive reverse voltage) * I_O = 200 mA (average rectified forward current) * I_F = 300 mA (DC forward current) * I_f = 400 mA (recurring peak forward current) * I_FSM = 1 A at 1 s pulse width; 4 A at 1 μs pulse width (non-repetitive peak forward surge current) Electrical and thermal characteristics * V_F = 1 V at 10 mA (maximum forward voltage) * V_R = 75 V at 5 μA; 100 V at 100 μA (minimum breakdown voltage and reverse leakage current) * t_rr = 4 ns (maximum reverse-recovery time) * P_D = 500 mW (maximum power dissipation)

References

External links

{{Commons category multi, 1N4148, Diodes, Diodes (SMD) Diodes