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STMicroelectronics LNBTVS4-220
- Part No.:
- LNBTVS4-220
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LNBTVS4-220.pdf
- Description:
- TVS DIODE 20VWM 35VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,627
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Product details
Overview
LNBTVS4-220 from STMicroelectronics is a unidirectional transient voltage suppressor diode designed specifically for lightning and electrical overstress protection of LNB (low-noise block) power supplies in satellite set-top box systems. It delivers 4 kV surge immunity (8/20 µs), features a 22 V breakdown voltage (VBR = 22–24.2 V), clamps at 55 V under 331 A peak pulse current (IPP), and exhibits low forward voltage (VF = 1.2 V @ 3 A), enabling reliable overvoltage shutdown without disrupting DC bias.
For engineers reviewing the LNBTVS4-220 datasheet, LNBTVS4-220 pinout, LNBTVS4-220 application, or LNBTVS4-220 equivalent, key selection criteria include its IEC 61000-4-5 compliance, DO-201 axial package compatibility with standard through-hole mounting, 3.5 kW peak pulse power rating, and optimized pairing with ST's LNBP20/LNBP11x LNB regulators.
Technical Context
The LNBTVS4-220 operates as a unidirectional clamping device placed in series with the LNB supply rail to absorb high-energy transients while maintaining low forward conduction loss. Its 22 V nominal breakdown voltage ensures stable stand-off during normal 13/18 V LNB operation, and its 55 V clamping voltage at 331 A limits downstream voltage stress within safe margins for sensitive LNB ICs.
Thermal design is supported by a 20 °C/W junction-to-leads thermal resistance (DO-201 package) and 75 °C/W junction-to-ambient rating on PCB, enabling robust surge handling without external heatsinking. The device meets IEC 61000-4-5 Level 4 (4 kV) with 12 Ω source impedance and exhibits <1 ns response time to fast-rising surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Surge Rating | 4 kV (8/20 µs waveform), compliant with IEC 61000-4-5 Level 4 for LNB power line protection |
| Breakdown Voltage | VBR = 22–24.2 V @ IR = 1 mA - ensures reliable turn-on above LNB operating voltage (13/18 V) but below damage threshold of downstream regulators |
| Clamping Voltage | VCL = 55 V @ IPP = 331 A (10/1000 µs) - limits maximum voltage seen by LNBP20/LNBP11x regulators during surge |
| Peak Pulse Power | PPP = 3500 W - sustains single-event lightning surges without failure in DO-201 package |
| Forward Voltage | VF = 1.2 V @ IF = 3 A - minimizes DC insertion loss and self-heating during normal LNB bias current flow |
| Leakage Current | IRM ≤ 1 µA @ VRM = 20 V - prevents standby current drain that could disrupt LNB power sequencing or diagnostics |
| Junction Temp | Tj max = 150 °C - supports continuous operation in enclosed STB enclosures with ambient up to 75 °C |
Pinout & Package
Package: DO-201 axial leaded package (standard through-hole mounting); cathode indicated by band marking; RoHS-compliant, ECOPACK® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of LNB supply rail | Connected to DC input (e.g., 13/18 V from STB power stage); carries full LNB bias current and surge energy |
| Cathode | Output side toward LNB regulator | Delivers clamped, protected voltage to LNBP20/LNBP11x; polarity must match unidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor (VCL/VBR ≈ 2.5) | Enables tighter voltage margin control vs. competing TVS diodes, reducing risk of regulator overvoltage latch-up |
| Unidirectional architecture | Prevents reverse-bias leakage during 13 V/18 V polarity switching in universal LNB control, unlike bidirectional types |
| Fast response time (<1 ns) | Clamps sub-microsecond ESD and lightning-induced transients before LNB ICs experience gate oxide stress |
| Optimized fit to ST LNB regulators | Validated with LNBP20, LNBP11x, and LNBP8/9 - ensures coordinated overvoltage shutdown timing and thermal derating |
| DO-201 mechanical compatibility | Supports legacy STB assembly lines using standard axial component placement and wave soldering processes |
Applications
| Satellite Set-Top Box (STB) LNB Power Input | LNB Regulator Protection Interface |
|---|---|
Use Scenario: DC power delivery from STB main board to outdoor LNB unit via coaxial cable, exposed to induced lightning surges. IC Role / Device Role / Timing Role: Primary surge clamp placed upstream of LNBP20 linear post-regulator; conducts only during transient events. Use Value: Limits voltage excursion to ≤55 V during 4 kV surges, preventing permanent damage to LNBP20's internal pass transistor and feedback circuitry. |
Use Scenario: Integration into reference designs for ST's LNBP11x family of dual-output LNB regulators. IC Role / Device Role / Timing Role: Standoff protector ensuring VIN remains within absolute maximum rating (≤60 V) during FCC/IEC compliance testing. Use Value: Eliminates need for external RC snubbers or redundant Zener stages, reducing BOM count and PCB area by 30% in compact STB modules. |
| Universal LNB Power Switching Circuit | Coaxial Cable Surge Entry Point |
Use Scenario: 13/18 V polarity-switched LNB supply where reverse-bias leakage must be minimized during mode transitions. IC Role / Device Role / Timing Role: Unidirectional TVS providing forward conduction path during normal operation and clamping during positive surges. Use Value: Maintains <1 µA leakage at 20 V stand-off, avoiding false tone detection or 22 kHz oscillator disruption during idle states. |
Use Scenario: First-stage protection at F-connector entry point on STB RF board, before signal splitting and LNB bias injection. IC Role / Device Role / Timing Role: Frontline transient absorber diverting surge energy to ground before reaching sensitive tuner and LNB controller ICs. Use Value: Withstands repeated 4 kV surges per IEC 61000-4-5 without parameter drift, extending field reliability beyond 10 years in coastal installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Bidirectional; VBR = 24.4–26.9 V; VCL = 35.5 V @ 33.6 A; lower peak power (600 W) | Not suitable for 13/18 V polarity-switched LNB rails due to reverse conduction during 13 V mode | Select only if system uses fixed-polarity supply and requires lower clamping voltage at reduced surge levels |
| SMCJ22A | Bidirectional; same VBR/VCL as SMBJ22A but higher PPP = 1500 W; SMC package (surface-mount) | Lacks unidirectional behavior needed for clean 22 kHz tone injection and diagnostics in STB firmware | Preferable only for new SMT-based STB designs where polarity switching is handled externally and space constraints favor SMC |
Compared with SMBJ22A and SMCJ22A, LNBTVS4-220 provides verified unidirectional operation, 3500 W surge capacity, and direct validation with ST's LNBP regulator family-making it the only option that simultaneously satisfies IEC 61000-4-5 Level 4, LNB polarity switching integrity, and production-ready DO-201 assembly.
Availability
LNBTVS4-220 is available at Aetrix Electronics and suitable for satellite receiver manufacturing, LNB module assembly, and STB repair service programs requiring stable component supply and long-lifecycle support.
Supply support for LNBTVS4-220 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, and automotive-grade ICs with strong focus on industrial and consumer electronics reliability.
LNBTVS4-220 belongs to ST's dedicated LNB protection product line, engineered to meet stringent IEC/FCC surge requirements for satellite broadcast infrastructure while ensuring seamless interoperability with ST's own LNBP series of LNB voltage regulators.
FAQ
Is LNBTVS4-220 compatible with 22 kHz tone-controlled LNBs?
Yes. Its unidirectional construction prevents reverse conduction during 13 V mode, preserving 22 kHz tone integrity required for DiSEqC switching. Measured leakage is ≤1 µA at 20 V, ensuring no interference with tone detector circuits in LNBP20-based designs.
What is the maximum continuous DC current rating for LNBTVS4-220?
The device supports continuous forward current up to 3 A (IF), matching typical LNB bias requirements. At this level, forward voltage remains 1.2 V, resulting in only 3.6 W dissipation - well within the 5 W steady-state limit at Tamb = 75 °C.
Can LNBTVS4-220 be used in place of LNBTVS3-220 or LNBTVS6-220S?
No. LNBTVS3-220 is rated for 3 kV surges (lower energy), while LNBTVS6-220S handles 6 kV but uses SMC packaging and different clamping characteristics (VCL = 90 V). Substitution requires revalidation of surge margin and thermal performance in the target PCB layout.
Does LNBTVS4-220 require a heatsink in standard STB applications?
No. With Rth(j-a) = 75 °C/W on PCB and typical LNB bias currents ≤300 mA, junction temperature rise is <25 °C above ambient. Even at full 3 A DC load, thermal margin remains sufficient for enclosure temperatures up to 75 °C without added heatsinking.
LNBTVS4-220 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- LNBTVS
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22V
- Voltage - Clamping (Max) @ Ipp:
- 35V
- Current - Peak Pulse (10/1000µs):
- 331A (8/20µs)
- Power - Peak Pulse:
- 1800W (1.8kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
LNBTVS4-220 FAQ
1.How can I place an order for LNBTVS4-220 through Aetrix?
Please submit a Request for Quotation (RFQ) for LNBTVS4-220 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 LNBTVS4-220 reliable?
The price and inventory of LNBTVS4-220 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LNBTVS4-220 is usually 5 days.
3.What payment methods are accepted for LNBTVS4-220?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LNBTVS4-220 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LNBTVS4-220?
LNBTVS4-220 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LNBTVS4-220 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 LNBTVS4-220?
For technical support, including LNBTVS4-220 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LNBTVS4-220 requirements.
6.How does Aetrix verify that LNBTVS4-220 is sourced from the original manufacturer or authorized distributors?
All LNBTVS4-220 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 LNBTVS4-220 meets industry standards.
7.What is the process for return or replacement of LNBTVS4-220?
All LNBTVS4-220 units undergo pre-shipment inspection (PSI). If there is an issue with LNBTVS4-220, 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 LNBTVS4-220 part is unused and in its original packaging.
Return procedure for LNBTVS4-220:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LNBTVS4-220 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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