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NXP Semiconductors BB170X

BB170X Varactor Diode, 2.75pF @ 28V, SOD-323, Active

MPNBB170X
End of Life

NXP BB170X VHF varactor diode, single, surface mount, SOD-323, 30 V peak reverse, 2.75pF @ 28V, capacitance ratio 15, -55 to 125°C, active.

$0.41Ref. price · indicative, final on quote
NXP Semiconductors BB170X datasheet (PDF)
PackagingSC-76, SOD-323
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BB170X specifications
ParameterValue
Diode typeSingle
MountingSurface Mount
Voltage - peak reverse30 V
Operating temperature-55°C ~ 125°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
CaseSC-76, SOD-323
Capacitance ratio15
Capacitance @ vr,2.75pF @ 28V, 1MHz
Capacitance ratio conditionC1/C28

Product details

2.75 pF at 28 V — the tuning capacitance that sets the VCO centre frequency

The BB170X is a single VHF varactor diode in a SOD-323 surface-mount package. Its typical capacitance is 2.75 pF at 28 V reverse bias and 1 MHz, with a capacitance ratio of 15 from C1 to C28.

30 V peak reverse — headroom for the tuning voltage rail

Peak reverse voltage is 30 V, so the tuning voltage can swing up to about 28 V without entering breakdown.

SOD-323 footprint and surface-mount assembly

The SOD-323 case (SC-76) is a standard small-signal diode footprint. It reflows on a standard board with no special pad geometry.

Frequently asked questions

What is the capacitance of BB170X at 28V?

At 28 V reverse bias and 1 MHz, the typical capacitance is 2.75 pF. This is the C28 value used to compute the capacitance ratio.

What is BB170X used for?

It is a VHF varactor diode for voltage-controlled oscillators, tunable filters, and phase-locked loops in RF front-ends. The 30 V reverse rating and 15:1 capacitance ratio suit it for wide-tuning-range designs in communications equipment.