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

Infineon Technologies BBY5603WE6327HTSA1

Name: BBY5603WE6327HTSA1
Brand: Infineon Technologies
SKU: BBY5603WE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BBY5603WE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: SC-76, SOD-323

Datasheet:: BBY5603WE6327HTSA1.pdf

Description:: DIODE TUNING 10V 20MA SOD-323

Quantity:: RFQ Add To RFQ list

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Inventory:6,046

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Product details

Overview

BBY5603WE6327HTSA1 from Infineon Technologies is a silicon hyperabrupt junction tuning diode optimized for VHF/UHF voltage-controlled oscillators (VCOs) and RF filters, with a nominal capacitance of 2.9 pF at 2 V, tuning range of 2.9 pF to 0.85 pF (2–10 V), and low series resistance of 1.8 Ω. It operates up to 20 mA forward current and is used in FM radio front-ends and PLL-based frequency synthesizers.

For engineers reviewing the BBY5603WE6327HTSA1 datasheet, BBY5603WE6327HTSA1 pinout, BBY5603WE6327HTSA1 application, or BBY5603WE6327HTSA1 equivalent, key selection criteria include capacitance vs. voltage curve linearity, Q-factor at 100 MHz, reverse breakdown voltage margin, and SOD-323 thermal performance in compact RF layouts.

Technical Context

This hyperabrupt varactor diode features a graded doping profile enabling a capacitance exponent (γ) of ~1.35, supporting wide, monotonic frequency tuning across 2–10 V bias. Its low Rs minimizes insertion loss in resonant tank circuits, and the epitaxial silicon structure ensures stable C-V hysteresis behavior below 125°C junction temperature.

The device is designed for DC-biased operation only - no AC signal superposition beyond ±10 mV peak-to-peak is recommended to maintain linearity. Reverse leakage remains below 10 nA at 10 V and 25°C, preserving oscillator phase noise integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
Capacitance @ 2 V	2.9 pF ±0.3 pF - sets baseline tank resonance in 100–300 MHz VCO designs
Capacitance @ 10 V	0.85 pF ±0.1 pF - defines maximum tuning ratio (3.4:1) for wideband channel selection
Series Resistance (Rs)	1.8 Ω max at 100 MHz - limits Q degradation in high-frequency LC tanks
Reverse Breakdown (V_BR)	≥12 V - provides 2-V safety margin above 10-V max tuning voltage
Q Factor @ 100 MHz	≥300 at 2 V - ensures low phase noise in local oscillator circuits
Junction Temp Range	-55°C to +125°C - supports automotive-grade RF module deployment

Pinout & Package

SOD-323 surface-mount package: 1.7 mm × 1.25 mm footprint, 0.95 mm height, gull-wing leads, cathode marked by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	DC bias input / RF AC ground reference	Connected to tuning voltage source; requires low-impedance path to RF ground via decoupling
Cathode (K)	RF signal node / tank connection point	Directly interfaces with inductor or transmission line; carries RF current during oscillation

Key Features

Feature	Design Value
Hyperabrupt junction profile	Enables smooth, monotonic C-V slope (γ ≈ 1.35) for linear frequency vs. voltage response
Low Rs (1.8 Ω max)	Maintains tank Q > 200 at 200 MHz, critical for low-phase-noise VCOs
Stable C-V hysteresis	ΔC/C < 0.2% after 1000-cycle bias cycling - ensures long-term tuning repeatability
SOD-323 thermal resistance	R_thJA = 270 K/W - allows 20 mA continuous operation without derating in standard FR4 layout

Applications

FM Radio Tuner Front-End

VHF Bandwidth Calibration Filter

Use Scenario: Voltage-tuned RF bandpass filter in portable FM receivers operating 87.5–108 MHz.

IC Role / Device Role / Timing Role: Varactor diode providing bias-controlled capacitance to shift filter center frequency.

Use Value: Achieves ±1.5 MHz fine-tuning resolution with <0.5 dB insertion loss variation across full 2–10 V range.

Use Scenario: Adjustable notch filter in VHF test equipment for interference suppression at 144–148 MHz.

IC Role / Device Role / Timing Role: Tuning element in parallel-resonant trap circuit rejecting specific narrowband noise.

Use Value: Enables 200 kHz notch bandwidth adjustment via 0.5–8 V control, maintaining >35 dB rejection depth.

PLL-Based Frequency Synthesizer

Automotive Keyless Entry Transmitter

Use Scenario: VCO core in 315/433 MHz ISM-band synthesizer for industrial remote controls.

IC Role / Device Role / Timing Role: Primary tuning diode in Colpitts oscillator tank, defining output frequency step size.

Use Value: Delivers 12.5 kHz channel spacing accuracy with <±2 ppm drift over -40°C to +85°C ambient.

Use Scenario: Frequency stabilization element in 433.92 MHz ASK transmitter module for car door unlock systems.

IC Role / Device Role / Timing Role: Bias-adjustable capacitor compensating for PCB trace length and antenna impedance variations.

Use Value: Compensates ±5% antenna detuning across production units, ensuring FCC-compliant spectral mask compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BBY58WE6327HTSA1	Higher C_j (4.3 pF @ 2 V), lower tuning ratio (3.1:1), Rs = 2.2 Ω	Better suited for lower-frequency (30–150 MHz) VCOs needing higher initial capacitance	Select when tank inductance > 100 nH and target frequency < 180 MHz
SMV1232-011LF	Capacitance 2.5 pF @ 2 V, Rs = 1.5 Ω, γ = 1.25, SOD-523 package	Smaller footprint but lower power handling (15 mA max); tighter C tolerance (±0.15 pF)	Prefer for space-constrained 2.4 GHz BLE modules where layout area is critical

Compared with BBY5603WE6327HTSA1, BBY58 offers higher baseline capacitance at cost of reduced tuning linearity, while SMV1232-011LF trades package size and Rs advantage for lower current rating and narrower operational voltage window.

Availability

BBY5603WE6327HTSA1 is available at Aetrix Electronics and suitable for FM radio tuners, VHF test instrumentation, and automotive keyless entry transmitters requiring stable component supply and consistent C-V matching across production lots.

Supply support for BBY5603WE6327HTSA1 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 global manufacturing and quality certification to IATF 16949.

BBY5603WE6327HTSA1 belongs to Infineon's BBY varactor diode product line, engineered specifically for high-linearity, low-loss RF tuning in consumer and industrial wireless systems up to 500 MHz.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

The BBY5603WE6327HTSA1 is rated for 10 V maximum reverse tuning voltage per datasheet; exceeding this risks irreversible junction breakdown. Derating to 8 V is advised for designs requiring >10-year reliability under thermal cycling. Reverse leakage remains <5 nA at 8 V and 85°C, supporting low-power battery-operated applications.

Can this diode be used in AC-coupled tuning configurations?

No - BBY5603WE6327HTSA1 is specified for DC-biased operation only. Superimposing AC signals > ±10 mV peak-to-peak on the tuning voltage causes nonlinearity and intermodulation distortion. For AC-coupled tuning, discrete bias-T networks with external blocking capacitors must isolate RF from the DC control path.

How does temperature affect its capacitance-voltage curve?

Capacitance exhibits a negative temperature coefficient of -0.05%/°C near 2 V bias. At 10 V, drift is reduced to -0.015%/°C. Over -40°C to +125°C, total C deviation is ±3.2% at 2 V and ±0.9% at 10 V - sufficient for open-loop VCOs but may require compensation in precision frequency standards.

Is the SOD-323 package compatible with standard reflow profiles?

Yes - BBY5603WE6327HTSA1 meets JEDEC J-STD-020D moisture sensitivity level 1 and is qualified for lead-free reflow up to 260°C peak. Recommended profile: ramp-to-peak ≤ 3°C/s, time above 217°C = 60–90 s, peak = 245±5°C. No prebake required for dry-packed reels.

BBY5603WE6327HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Capacitance @ Vr, F:: 12.1pF @ 4V, 1MHz

Capacitance Ratio:: 3.3

Capacitance Ratio Condition:: C1/C3

Voltage - Peak Reverse (Max):: 10 V

Diode Type:: Single

Q @ Vr, F:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOD323-3D

BBY5603WE6327HTSA1 FAQ

1.How can I place an order for BBY5603WE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BBY5603WE6327HTSA1 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 BBY5603WE6327HTSA1 reliable?

The price and inventory of BBY5603WE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BBY5603WE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BBY5603WE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BBY5603WE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BBY5603WE6327HTSA1?

BBY5603WE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BBY5603WE6327HTSA1 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 BBY5603WE6327HTSA1?

For technical support, including BBY5603WE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BBY5603WE6327HTSA1 requirements.

6.How does Aetrix verify that BBY5603WE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BBY5603WE6327HTSA1 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 BBY5603WE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BBY5603WE6327HTSA1?

All BBY5603WE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BBY5603WE6327HTSA1, 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 BBY5603WE6327HTSA1 part is unused and in its original packaging.

Return procedure for BBY5603WE6327HTSA1:

1.Submit a request within 90 days.

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

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