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1N4148WT

100V 150mA fast switching diode, 4ns trr, SOD-523

142163

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Pieza del fabricante：

1N4148WT

Paquete：

SOD-523 (1.6 x 0.8 x 0.6 mm)

Marca：
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Descripción

Productos

The 1N4148WT is a surface-mount fast switching diode in a SOD-523 package. With 100V reverse voltage, 150mA average rectified current, 4ns reverse recovery time, and 150mW power dissipation, it is the industry-standard small signal switching diode in an ultra-small footprint for automated placement.

Especificaciones

Reverse Voltage (VR) 100V max (repetitive peak)
Average Rectified Current 125-150 mA
Forward Voltage 0.715V max @ 1mA; 0.855V @ 10mA; 1.0V @ 50mA; 1.25V @ 150mA
Reverse Leakage 25 nA max @ VR=20V; 1.0 uA @ VR=75V
Reverse Recovery Time 4 ns max
Junction Capacitance 2.0 pF max @ VR=0, 1MHz
Non-repetitive Peak Surge 2A @ 1us; 1A @ 100ms
Power Dissipation 150 mW
Junction Temperature -55 to +150 C
Paquete SOD-523 (1.6 x 0.8 x 0.6 mm)
Marking A or T4
RoHS Yes
Status Activo

Características

  • Ultra-small SOD-523 surface-mount package
  • Fast switching speed (4ns trr)
  • Low junction capacitance (2pF)
  • Low forward voltage (0.715V @ 1mA)
  • Low leakage current (25nA @ 20V)
  • AEC-Q101 qualified version available (1N4148WTQ-7)
  • Halogen and antimony free (Green device)

Aplicaciones

  • General purpose switching
  • High-speed signal processing
  • Reverse polarity protection
  • Logic level clamping

The 1N4148WT is the surface-mount variant of the legendary 1N4148 small signal switching diode, packaged in the ultra-compact SOD-523 (also known as SC-79) footprint measuring only 1.6 x 0.8 x 0.6 mm. The WT suffix denotes the SOD-523 package specifically. Multiple manufacturers produce this industry-standard device including Diodes Incorporated, Toshiba, and Diotec. The diode features 100V repetitive peak reverse voltage, 150mA average rectified current, and an ultra-fast 4ns reverse recovery time, making it ideal for high-speed switching applications. The low 2pF junction capacitance and 25nA reverse leakage at 20V ensure minimal circuit loading. Forward voltage drops are 0.715V at 1mA and 0.855V at 10mA. The device is rated for 150mW power dissipation with a thermal resistance of 833 C/W junction-to-ambient. An AEC-Q101 qualified automotive version (1N4148WTQ-7) is available for automotive applications.

The 1N4148WT operates as a standard PN junction switching diode: (1) Forward Bias: When the anode voltage exceeds the cathode by approximately 0.6-0.7V (the forward voltage drop), the diode conducts current with low impedance. The forward voltage increases logarithmically with current: 0.715V at 1mA, 0.855V at 10mA, 1.0V at 50mA. (2) Reverse Bias: When cathode voltage exceeds anode, the diode blocks current flow up to 100V peak reverse voltage. Reverse leakage is extremely low at 25nA typical at 20V and 25C, but increases with temperature. (3) Switching: The 4ns reverse recovery time is the time required for stored minority carriers to be swept out of the depletion region when the diode transitions from forward to reverse bias. This fast recovery enables the diode to operate at high frequencies without significant switching losses. (4) Capacitance: The 2pF junction capacitance represents the depletion region capacitance at zero bias, which decreases with increasing reverse voltage. This low capacitance minimizes signal distortion in high-frequency circuits.

Pin Nombre Tipo Descripción
1 Ánodo Entrada Positive terminal (no band)
2 Cátodo Entrada Negative terminal (cathode band mark)
  • High-speed logic level signal clamping with 4ns recovery and 2pF capacitance
  • General purpose switching in portable devices requiring SOD-523 ultra-small footprint
  • Reverse polarity protection for low-current circuits with 100V blocking voltage
  • Automotive signal processing using AEC-Q101 qualified 1N4148WTQ-7 variant
Modelo Fabricante Paquete VR Notas
1N4148WS Various SOD-323 100V Larger footprint, easier assembly
1N4148W Various SOD-123 100V Even larger, very easy assembly
BAV99 Various SOT-23 75V Dual series diode in SOT-23
MMSD4148 onsemi SOD-123 100V onsemi branded alternative
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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