SMV1248 Series

Hyperabrupt Junction Tuning Varactor

Please note: SMV1248-040LF is being discontinued and is not recommended for new designs.

SMV1248 Series includes SMV1248-079LF

The SMV1247-SMV1255 group of silicon hyperabrupt junction varactor diodes is designed for use in Voltage Controlled Oscillators (VCOs) with a low tuning voltage operation. This group of varactors is characterized for capacitance and resistance over temperature.

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Package Type SC-70. SC-79, SOT-23
Vr Reverse Breakdown Voltage Ir = 10 µA (V) Min.15
Ct Total Capacitance3 Vr=1 V (pF) Typ.12.33
Ct Total Capacitance3 Vr=4 V (pF) Typ.1.71
Ct Total Capacitance3 Vr=8 V (pF) Typ.1.3
Ct Total Capacitance3 Vr=12 V (pF) Typ.
Ct Total Capacitance3 Vr=20 V (pF) Typ.
Total Capacitance Ratio Min.110.8
Capacitance Ratio Range (V)0.3 to 4.7
Rs Series Resistance Max2 (Ω)3.3


  • High capacitance ratio: C0.3V/C4.7V = 12 typical
  • Packages rated MSL1, 260 °C per JEDEC J-STD-020

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