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

Infineon Technologies BB55502VH7912XTSA1

Name: BB55502VH7912XTSA1
Brand: Infineon Technologies
SKU: BB55502VH7912XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BB55502VH7912XTSA1

Manufacturer:: Infineon Technologies

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: SC-79, SOD-523

Datasheet:: BB55502VH7912XTSA1.pdf

Description:: BB555 - VARIABLE CAPACITANCE DIO

Quantity:: RFQ Add To RFQ list

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Inventory:420,775

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Product details

Overview

BB55502VH7912XTSA1 from Infineon Technologies 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 BB55502VH7912XTSA1 datasheet, BB55502VH7912XTSA1 pinout, BB55502VH7912XTSA1 application, or BB55502VH7912XTSA1 equivalent, key selection criteria include capacitance vs. voltage curve linearity, low rₛ (0.58 Ω typ.), tight matching tolerance (±0.25% 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 capacitance across 1.9–18.7 pF range. Its low LS (0.6 nH) and rS (0.58 Ω typ.) minimize Q-factor degradation above 470 MHz, critical for UHF band stability.

The device uses an "in-line" matching assembly process to ensure ∆CT/CT ≤ 0.25% across four-diode sequences, enabling precise channel-to-channel tracking in multi-tuner architectures without per-unit calibration.

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 with predictable trim range
Capacitance Ratio CT₁/CT₂₈	8.9 typical - enables ≥3-octave tuning range while maintaining monotonic C-V slope
Series Inductance LS	0.6 nH - limits self-resonant frequency shift and preserves effective capacitance up to 1 GHz
Series Resistance rS	0.58 Ω typical @ 470 MHz - sustains Q > 120 at 600 MHz, minimizing phase noise in VCOs
Reverse Voltage VR	30 V max - supports wide-tuning-range bias networks with safety margin against transient spikes
Capacitance Matching ∆CT/CT	±0.25% over 4-diode sequence - ensures <0.5 MHz channel deviation across multi-path tuner ICs

Pinout & Package

SC79 ultra-small surface-mount package (1.3 × 0.7 × 0.5 mm), cathode-marked single-anode configuration with gull-wing leads. Optimized for high-frequency layout with minimal pad inductance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	DC bias input / AC ground reference	Connected to fixed DC potential; serves as RF ground node in series-tuned configurations
Cathode	RF signal terminal / tuning voltage node	Accepts variable reverse bias (1–28 V); carries RF signal in shunt-tuned VCO tanks

Key Features

Feature	Design Value
UHF-optimized low-inductance structure	0.6 nH LS ensures usable capacitance beyond 800 MHz without resonance distortion
In-line matched diode assembly	0.25% ∆CT/CT over 4-diode sequence enables factory-trimmed multi-tuner alignment
Low-loss junction design	0.58 Ω rS maintains Q > 120 at 600 MHz, directly reducing VCO phase noise floor
Pb-free RoHS-compliant packaging	SC79 footprint compatible with lead-free reflow profiles (J-STD-020, peak 260°C)

Applications

UHF Digital TV Tuner Front-End

VHF/UHF Dual-Band Set-Top Box Tuner

Use Scenario: Selecting RF channels in terrestrial DVB-T receivers operating 470–862 MHz.

IC Role / Device Role / Timing Role: Varactor in LC tank of broadband VCO, tuned by analog voltage from tuner IC's DAC output.

Use Value: 8.9 CT₁/CT₂₈ ratio and 0.25% matching enable ±1.2 MHz frequency accuracy across 50+ channels without per-unit calibration.

Use Scenario: Simultaneous reception of VHF (174–230 MHz) and UHF (470–862 MHz) bands in hybrid tuners.

IC Role / Device Role / Timing Role: Primary tuning element in switched-band LC filters, selected via RF switch matrix.

Use Value: Low 0.6 nH LS prevents impedance discontinuity at band-switch boundaries, preserving insertion loss <1.5 dB.

Automotive Digital Radio (DAB/DAB+) Receiver

Professional Broadcast Monitoring Equipment

Use Scenario: Frequency-agile demodulation of DAB+ multiplexes across ETSI Band III (174–240 MHz).

IC Role / Device Role / Timing Role: Voltage-controlled capacitor in PLL-based synthesizer loop filter and VCO tank.

Use Value: -55 °C to +150 °C operating range ensures stable C-V curve under automotive under-hood thermal cycling.

Use Scenario: Wideband spectrum analysis and adjacent-channel interference measurement in field test gear.

IC Role / Device Role / Timing Role: Calibration-grade tuning element in swept-frequency reference oscillators.

Use Value: Tight 0.25% capacitance matching allows traceable inter-unit repeatability within ±0.3 dB amplitude error.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAT54C,115	Lower capacitance (10 pF @ 1 V), higher rS (1.2 Ω), no specified matching tolerance	Suitable for general-purpose RF switching, not precision tuning	Select only for cost-sensitive non-tuner applications where C-V linearity and matching are non-critical
SMV1232-011	Higher CT₁/CT₂₈ (12.5), but LS = 0.9 nH and rS = 0.85 Ω; SOD-323 package	Better ratio but degraded UHF Q-factor; requires larger PCB area than SC79	Prefer when wider tuning range outweighs UHF phase-noise penalty and board space permits SOD-323

Compared with BAT54C and SMV1232-011, BB55502VH7912XTSA1 uniquely balances high ratio (8.9), ultra-low LS (0.6 nH), and production-grade matching (±0.25%)-making it the only option qualified for factory-calibrated UHF TV tuner modules requiring <1.5 MHz channel drift.

Availability

BB55502VH7912XTSA1 is available at Aetrix Electronics and suitable for UHF digital TV tuners, automotive DAB+ receivers, and broadcast monitoring equipment requiring stable component supply across extended temperature and high-volume production cycles.

Supply support for BB55502VH7912XTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with leadership in high-reliability discrete components for demanding RF applications.

BB55502VH7912XTSA1 belongs to Infineon's BB555 varactor family, engineered specifically for high-precision, high-yield UHF TV tuner manufacturing with emphasis on matching, low parasitics, and thermal stability.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

The absolute maximum reverse voltage is 30 V at TA = 25°C, with a peak rating of 35 V. Operation above 28 V reduces capacitance to ≤2.1 pF and increases sensitivity to temperature drift; sustained bias >30 V risks junction breakdown and irreversible parameter shift.

How does the capacitance matching specification apply in production use?

The ±0.25% ∆CT/CT applies to groups of four diodes assembled in sequence using Infineon's in-line matching process. It guarantees capacitance deviation ≤0.035 pF across the 1–28 V range, enabling direct replacement in multi-tuner PCBs without individual trimming or binning.

Can BB55502VH7912XTSA1 be used in 5G sub-6 GHz front-ends?

No - while its self-resonant frequency exceeds 1 GHz, the 0.58 Ω rS and 0.6 nH LS yield Q ≈ 95 at 3.5 GHz, below the ≥150 Q required for low-phase-noise 5G n78/n79 VCOs. It is validated only for UHF TV (≤862 MHz) and DAB+ (≤240 MHz) applications.

Is the SC79 package compatible with standard reflow soldering profiles?

Yes - the Pb-free SC79 package meets J-STD-020D requirements, supporting peak reflow temperatures up to 260°C for 30 seconds. Thermal resistance (R_thJA) is 220 K/W, and board-level reliability has been verified per AEC-Q200 stress tests including 1000-cycle thermal cycling (-40°C to +125°C).

BB55502VH7912XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Bulk

Product Status:: Active

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

BB55502VH7912XTSA1 FAQ

1.How can I place an order for BB55502VH7912XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BB55502VH7912XTSA1 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 BB55502VH7912XTSA1 reliable?

The price and inventory of BB55502VH7912XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB55502VH7912XTSA1 is usually 5 days.

3.What payment methods are accepted for BB55502VH7912XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB55502VH7912XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BB55502VH7912XTSA1?

BB55502VH7912XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BB55502VH7912XTSA1 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 BB55502VH7912XTSA1?

For technical support, including BB55502VH7912XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB55502VH7912XTSA1 requirements.

6.How does Aetrix verify that BB55502VH7912XTSA1 is sourced from the original manufacturer or authorized distributors?

All BB55502VH7912XTSA1 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 BB55502VH7912XTSA1 meets industry standards.

7.What is the process for return or replacement of BB55502VH7912XTSA1?

All BB55502VH7912XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BB55502VH7912XTSA1, 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 BB55502VH7912XTSA1 part is unused and in its original packaging.

Return procedure for BB55502VH7912XTSA1:

1.Submit a request within 90 days.

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

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