SMV1234 Series
Hyberabrupt Junction Tuning Varactor

The SMV123x series of silicon hyperabrupt junction varactor diodes are designed for use in Voltage Controlled Oscillators (VCOs) with a low tuning voltage operation. The low resistance of these varactors makes them appropriate for high-Q resonators in wireless system VCOs to frequencies over 10 GHz. This family of varactors is characterized for capacitance and resistance over temperature.


  • High capacitance ratio
  • Low series resistance for low phase noise
  • Packages rated MSL1, 260 °C per JEDEC J-STD-020
Data Sheets SMV123x Series: Hyperabrupt Junction Tuning Varactors SMV123x_Series_200058X.pdf (981 KB)
Product Brief PIN, Limiter, Schottky, Varactor Diodes - Select Diodes Available From Stock for Prototype or High Volume Production PB123_16A_7_16.pdf (779 KB)
Application Notes Solder Reflow Information Solder_Reflow_Info_200164C.pdf (109 KB)
Application Notes Varactor SPICE Models for RF VCO Applications Varactor_SPICE_Model_AN_200315C.pdf (240 KB)
ProductName : SMV1234 Series
Package Type : SC-70, SC-79, SOD-323, SOD-882, SOT-23
Vr Reverse Breakdown Voltage Ir = 10 µA (V) Min. : 15
Ct Total Capacitance3 Vr=1 V (pF) Typ. : 6.28
Ct Total Capacitance3 Vr=4 V (pF) Typ. : 2.81
Ct Total Capacitance3 Vr=8 V (pF) Typ. : 1.65
Ct Total Capacitance3 Vr=12 V (pF) Typ. : 1.38
Ct Total Capacitance3 Vr=20 V (pF) Typ. :
Total Capacitance Ratio Min.1 : 1.6
Capacitance Ratio Range (V) : 1 to 3
Rs Series Resistance Max2 (Ω) : 0.8
Product Information:
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