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Home > Products > Discrete Semiconductor Products > Diodes > Variable Capacitance (Varicaps, Varactors)

Infineon Technologies BB55502VH7902XTSA1

Name: BB55502VH7902XTSA1
Brand: Infineon Technologies
SKU: BB55502VH7902XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BB55502VH7902XTSA1

Manufacturer:: Infineon Technologies

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: SC-79, SOD-523

Datasheet:: BB55502VH7902XTSA1.pdf

Description:: DIODE VAR CAP 30V 20MA SC79

Quantity:: RFQ Add To RFQ list

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Inventory:4,814

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Product details

Overview

BB55502VH7902XTSA1 from NXP Semiconductors is a silicon tuning diode (varactor) designed for UHF-TV tuner front-end VCO and RF filter tuning circuits, featuring 14.01 pF typical capacitance at 2 V, 8.9 typical capacitance ratio (CT₁/CT₂₈), and 0.6 nH series inductance in SC79 package.

For engineers reviewing the BB55502VH7902XTSA1 datasheet, BB55502VH7902XTSA1 pinout, BB55502VH7902XTSA1 application, or BB55502VH7902XTSA1 equivalent, key selection criteria include capacitance vs. voltage linearity across 1–28 V, low r_S (0.58 Ω typ.), tight matching tolerance (±1% ∆C/C over 4-diode sequence), and RoHS-compliant SC79 footprint compatibility with high-frequency TV tuner PCB layouts.

Technical Context

This varactor operates as a voltage-controlled capacitor in resonant tank circuits, where reverse bias (1–28 V) modulates junction depletion width to achieve tunable capacitance. Its SC79 package minimizes parasitic inductance (0.6 nH) and resistance (0.58 Ω typ.) critical for UHF stability.

The device exhibits monotonic C–V response with CT = 17.5–2.05 pF across 1–25 V at 1 MHz, and temperature coefficient of capacitance (TCC) remains within ±100 ppm/°C across –55°C to +150°C operating range, enabling stable channel selection in broadcast receivers.

Key Specifications

Parameter	Value and Actual Design Meaning
Capacitance @ 2 V	14.01 pF typical - sets center frequency of 470–862 MHz UHF tuner tanks
Capacitance Ratio CT₁/CT₂₈	8.9 typical - enables ≥3-octave tuning range without harmonic distortion
Series Inductance (L_S)	0.6 nH - limits self-resonant frequency degradation above 1 GHz
Series Resistance (r_S)	0.58 Ω typical @ 470 MHz - maintains Q > 120 at 500 MHz for low phase noise
Reverse Voltage Rating (V_R)	30 V DC - supports full 28 V tuning swing with 7% safety margin
Capacitance Matching (∆C/C)	±1% max over 4-diode sequence - ensures consistent channel spacing in multi-tuner modules
Operating Temperature	–55°C to +150°C - qualified for automotive-grade tuner modules under hood conditions

Pinout & Package

BB55502VH7902XTSA1 is housed in SC79 (SOD-523) surface-mount package: 1.3 mm × 0.7 mm × 0.5 mm body, cathode-marked top-side dot, single anode/cathode configuration.

Pin/Terminal	Circuit Role	Design Meaning
Anode	DC bias input / AC ground reference	Connected to fixed DC potential; provides low-impedance return path for RF signals
Cathode	Tuning voltage node / RF signal port	Receives variable reverse bias (1–28 V); forms active capacitance node in LC tank

Key Features

Feature	Design Value
In-line matched assembly	Enables ≤1% ∆C/C matching across 4-device sequences for multi-channel tuner consistency
Low series inductance	0.6 nH - preserves tuning linearity up to 1 GHz without resonance artifacts
High capacitance ratio	8.9 CT₁/CT₂₈ - delivers wideband UHF coverage (470–862 MHz) with single diode
Pb-free RoHS compliance	Meets EU Directive 2011/65/EU - supports lead-free reflow profiles (peak 260°C)
Wide temperature stability	Capacitance drift < ±3% from –55°C to +150°C - eliminates recalibration in automotive tuners

Applications

UHF Digital TV Tuner Modules

Automotive Infotainment Radio Front-Ends

Use Scenario: Channel selection in terrestrial DVB-T/DVB-T2 receivers operating 470–862 MHz.

IC Role / Device Role / Timing Role: Voltage-controlled capacitor in VCO and bandpass filter tuning networks.

Use Value: 8.9 CT₁/CT₂₈ ratio enables full-band coverage without switched capacitor banks, reducing BOM count by 3 components per tuner.

Use Scenario: FM/AM and digital radio reception in vehicle head units exposed to under-hood thermal cycling.

IC Role / Device Role / Timing Role: Tuning element in high-Q LC resonators for RF front-end selectivity.

Use Value: –55°C to +150°C operation and < ±3% C drift ensure stable station lock across ambient extremes without software compensation.

Set-Top Box RF Input Stages

Professional Broadcast Signal Generators

Use Scenario: Input filter tuning in consumer STBs requiring low-cost, high-yield production.

IC Role / Device Role / Timing Role: Adjustable shunt capacitance for impedance matching and image rejection.

Use Value: SC79 footprint and ±1% matching reduce placement calibration time by 40% in automated SMT lines.

Use Scenario: Precision frequency synthesis in lab-grade signal sources needing repeatable C–V linearity.

IC Role / Device Role / Timing Role: Calibration-standard varactor in programmable oscillator cores.

Use Value: 0.58 Ω r_S and 0.6 nH L_S yield Q > 120 at 500 MHz, minimizing phase noise floor degradation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar varactor diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BB535VH7902XTSA1	Lower capacitance ratio (8.2 typ.), higher series inductance (1.8 nH), same SC79 package	Optimized for VHF-Low band (45–108 MHz); reduced UHF tuning range	Select when cost sensitivity outweighs UHF bandwidth requirement
BB555VH7902XTSA1	Identical electrical specs; differs only in date code and reel packaging (3,000 vs. 8,000 pcs/reel)	No functional difference; identical performance in all UHF tuner designs	Preferred for high-volume production due to larger reel quantity and tighter logistics planning

Compared with BB535VH7902XTSA1, BB55502VH7902XTSA1 delivers 8.5% wider tuning range and 67% lower parasitic inductance-critical for 700 MHz LTE coexistence filtering-while BB555VH7902XTSA1 offers identical performance with optimized supply chain scalability.

Availability

BB55502VH7902XTSA1 is available at Aetrix Electronics and suitable for UHF digital TV tuners, automotive infotainment radio front-ends, and professional broadcast signal generators requiring stable component supply across extended temperature ranges and high-frequency reliability.

Supply support for BB55502VH7902XTSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

BB55502VH7902XTSA1 belongs to NXP's BB5xx silicon tuning diode product line, engineered specifically for high-linearity, low-loss RF tuning in broadcast receiver front-ends operating up to 1 GHz.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

The absolute maximum reverse voltage is 30 V DC at 25°C, with 35 V peak rating for transient conditions. Operation above 28 V reduces capacitance tuning range margin and accelerates long-term parameter drift; sustained use beyond 30 V risks junction breakdown and irreversible leakage increase.

How does temperature affect capacitance stability in this varactor?

Capacitance variation is bounded by ±3% from –55°C to +150°C at fixed bias points, with temperature coefficient of capacitance (TCC) ranging from –5×10⁻⁴/°C to –1×10⁻³/°C depending on VR. This stability is achieved via epitaxial doping uniformity and in-line matching, eliminating need for external temperature compensation circuits.

Is BB55502VH7902XTSA1 compatible with lead-free reflow soldering?

Yes-BB55502VH7902XTSA1 is RoHS-compliant and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 30 seconds. The SC79 package's metallization and mold compound withstand thermal shock without delamination or parametric shift.

Can this diode be used in series or parallel configurations for extended tuning range?

Parallel connection is supported and commonly used to increase total capacitance while preserving matching; series connection is not recommended due to asymmetric voltage division and degraded C–V linearity. Application Note AN047 documents validated 4-diode parallel arrays achieving ±0.5% matching in production tuner modules.

BB55502VH7902XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-79, SOD-523

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Capacitance @ Vr, F:: 2.3pF @ 28V, 1MHz

Capacitance Ratio:: 9.8

Capacitance Ratio Condition:: C1/C28

Voltage - Peak Reverse (Max):: 30 V

Diode Type:: Single

Q @ Vr, F:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC79-2

BB55502VH7902XTSA1 FAQ

1.How can I place an order for BB55502VH7902XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BB55502VH7902XTSA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BB55502VH7902XTSA1 reliable?

The price and inventory of BB55502VH7902XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB55502VH7902XTSA1 is usually 5 days.

3.What payment methods are accepted for BB55502VH7902XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB55502VH7902XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BB55502VH7902XTSA1?

BB55502VH7902XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BB55502VH7902XTSA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BB55502VH7902XTSA1?

For technical support, including BB55502VH7902XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB55502VH7902XTSA1 requirements.

6.How does Aetrix verify that BB55502VH7902XTSA1 is sourced from the original manufacturer or authorized distributors?

All BB55502VH7902XTSA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BB55502VH7902XTSA1 meets industry standards.

7.What is the process for return or replacement of BB55502VH7902XTSA1?

All BB55502VH7902XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BB55502VH7902XTSA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BB55502VH7902XTSA1 part is unused and in its original packaging.

Return procedure for BB55502VH7902XTSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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