1N4148 Diode

Specifications of 1N4148 diode

  • Maximum Recurrent Peak Reverse Voltage: 100 V
  • Maximum Average Forward Output Current: 0.15 A
  • Maximum Forward Voltage Drop per element at 1.0A DC: 1 V
  • Maximum reverse recovery time: 4 ns
  • Typical Junction Capacitance: 4 pF
  • Package: DO-35
  • Weight: 0.13 grams
  • Operating and Storage Temperature Range: -65...+150 °C

Polarity and Pinout

The 1N4148 diode has a cathode (-) and anode (+). In the schematic symbol, the tip of the triangle with the line on top of it is the cathode. The cathode is marked on the body of a diode by a band as shown below.
1N4148 diode polarity
The current can flow from only the anode to the cathode and never from the cathode to the anode - the 1N4148 diode is like a one way electric valve.

Dimensions of 1N4148 diode

Dimensions 1N4148 diode

Replacement and Equivalent

You can replace the 1N4148 with the 1N4448WS, 1N4448W, 1N4448, 1N4148WS, 1N4148W

1N4148 Spice Model

.model 1N4148 D 
+ IS = 4.352E-9 
+ N = 1.906 
+ BV = 110 
+ IBV = 0.0001 
+ RS = 0.6458 
+ CJO = 7.048E-13 
+ VJ = 0.869 
+ M = 0.03 
+ FC = 0.5 
+ TT = 3.48E-9