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STMicroelectronics LNBTVS4-220S
- Part No.:
- LNBTVS4-220S
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
LNBTVS4-220S.pdf
- Description:
- TVS DIODE 20VWM 35VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,890
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Product details
Overview
LNBTVS4-220S from STMicroelectronics is a unidirectional transient voltage suppressor (TVS) diode designed for lightning and ESD protection of LNBH-series satellite low-noise block downconverter supply lines. It features 334 A peak pulse current (8/20 µs), 23.1–24.2 V breakdown voltage, 35 V clamping voltage at 334 A, 1.2 V forward voltage at 3 A, and 0.2 µA leakage at 25 °C - deployed in SMC (DO-214AB) package for satellite set-top box front-end protection.
For engineers reviewing the LNBTVS4-220S datasheet, LNBTVS4-220S pinout, LNBTVS4-220S application, or LNBTVS4-220S equivalent, key selection criteria include IEC 61000-4-5 compliance at 85 °C junction temperature, low clamping factor for LNBH23/LNBH25 interface protection, unidirectional polarity with cathode band marking, and compatibility with standard IPC 7531 SMC footprints.
Technical Context
This TVS diode employs planar junction technology to achieve stable clamping performance across -55 °C to +150 °C junction temperature range, with thermal resistance of 15 °C/W (junction-to-leads) in SMC package. Its low VF (1.2 V @ 3 A) minimizes forward conduction loss during normal LNBH bias operation.
Designed specifically for satellite LNB power rails, it delivers 1250 W surge capability at Tjmax = 150 °C under 10/1000 µs waveform and maintains IEC 61000-4-5 compliance even at elevated ambient temperatures up to 85 °C - critical for sealed consumer enclosure environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Current (8/20 µs) | 334 A - withstands 4 kV surges per IEC 61000-4-5 with 12 Ω source impedance |
| Breakdown Voltage (VBR) | 23.1–24.2 V @ 1 mA - ensures reliable turn-on before LNBH23/LNBH25 overvoltage damage |
| Clamping Voltage (VCL) | 35 V @ 334 A (8/20 µs) - limits transient stress on downstream LNBH regulator input |
| Forward Voltage (VF) | 1.2 V @ 3 A - enables low-loss DC bias path for LNBH supply without significant voltage drop |
| Leakage Current (IRM) | 0.2 µA @ 22 V - negligible standby current draw on 12 V LNBH supply rail |
| Junction Temperature Range | -55 to +150 °C - supports operation in thermally constrained satellite receiver enclosures |
| Package | SMC (JEDEC DO-214AB) - IPC 7531-compliant footprint with 0.245 g mass and UL 94 V0 resin |
Pinout & Package
Package: SMC (JEDEC DO-214AB), surface-mount molded plastic case with solderable leads per MIL-STD-750 Method 2026; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC supply input (LNBH VIN side) | Connected to 12 V rail upstream of LNBH regulator; carries steady-state bias current |
| Cathode | Ground reference / surge return path | Connected to system ground plane; provides low-impedance path for transient energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor (VCL/VBR ≈ 1.45) | Enables tighter overvoltage margin control versus LNBH23 absolute maximum rating (40 V) |
| Unidirectional configuration | Prevents reverse-bias leakage during normal 12 V DC operation while enabling fast surge clamping |
| High surge robustness at Tj = 85 °C | Maintains full IEC 61000-4-5 compliance without derating in sealed consumer-grade enclosures |
| Planar junction construction | Delivers stable VBR drift (αT = 9.3 × 10⁻⁴ /°C) and long-term reliability in high-cycle surge environments |
| UL 94 V0 flammability rating | Meets safety requirements for plastic housing integration in CE/FCC-certified satellite receivers |
Applications
| Satellite LNB Power Protection | LNBH23/LNBH24 Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V DC supply line to LNBH23 voltage regulator in digital satellite set-top boxes exposed to antenna-coupled lightning surges. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between LNBH VIN pin and ground, activated within nanoseconds of overvoltage event. Use Value: Limits transient voltage to ≤35 V during 4 kV IEC 61000-4-5 surges, preventing LNBH23 latch-up or permanent damage. |
Use Scenario: Safeguarding LNBH24-based dual-LNB switching circuits against electrostatic discharge from coaxial cable handling. IC Role / Device Role / Timing Role: Unidirectional TVS connected directly to LNBH24 VIN pin, clamping ESD events per IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact). Use Value: 0.2 µA leakage preserves LNBH24 quiescent current budget; 1.2 V VF avoids interference with 22 kHz DiSEqC signaling. |
| LNBH25/26-Based Multiswitch Systems | Outdoor Satellite Receiver Front-Ends |
|
Use Scenario: Surge protection for LNBH25-powered multiswitch units feeding multiple satellite receivers via single coaxial feed. IC Role / Device Role / Timing Role: Primary TVS on main 12 V input rail, coordinated with series inductance (>13 nH) to isolate RF IF path. Use Value: 334 A peak current rating handles worst-case induced surges from nearby lightning strikes without degradation. |
Use Scenario: Protecting compact outdoor satellite receivers mounted on balconies or rooftops subject to atmospheric electrical stress. IC Role / Device Role / Timing Role: SMC-packaged TVS integrated into PCB layout adjacent to IF connector, leveraging thermal mass for sustained surge dissipation. Use Value: 15 °C/W junction-to-lead thermal resistance enables reliable operation at 150 °C junction temperature during repeated surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A (Diodes Inc.) | Higher clamping voltage (43 V @ 334 A), SMB package (higher Rth(j-l) = 20 °C/W), 24 V nominal VBR | Less effective clamping margin for LNBH23 (40 V abs max); requires larger PCB area due to SMB footprint | Select only if SMC footprint unavailable; verify thermal margin at 85 °C ambient with 20 °C/W Rth |
| SMCJ24A (ON Semiconductor) | Same SMC package, but higher VBR (24–26.5 V), higher VCL (38.9 V @ 334 A), 1.5 µA IRM at 24 V | Reduced noise immunity margin vs. LNBH25 (36 V abs max); higher leakage may affect ultra-low-power standby modes | Acceptable for cost-sensitive designs where 3.9 V higher clamping is tolerable; confirm DiSEqC signal integrity |
Compared with SMBJ24A and SMCJ24A, LNBTVS4-220S offers superior clamping margin (35 V vs. ≥38.9 V), lower leakage (0.2 µA vs. ≥1.5 µA), and optimized thermal performance (15 °C/W) - making it the preferred choice for space-constrained, thermally demanding satellite LNB protection.
Availability
LNBTVS4-220S is available at Aetrix Electronics and suitable for satellite set-top box manufacturing, LNBH regulator interface protection, and outdoor RF front-end surge hardening requiring stable component supply and full IEC 61000-4-5 compliance.
Supply support for LNBTVS4-220S 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
LNBTVS4-220S belongs to ST's Transil™ TVS diode product line, engineered specifically for low-noise block (LNB) power rail protection in satellite reception systems - balancing ultra-low leakage, precise clamping, and high-temperature surge resilience.
FAQ
What is the maximum continuous DC voltage this TVS can withstand without clamping?
The LNBTVS4-220S has a stand-off voltage (VRM) of 22 V - meaning it remains non-conductive up to this DC voltage under normal operation. At 22 V, leakage current is guaranteed ≤0.2 µA at 25 °C. Clamping begins at minimum breakdown voltage of 23.1 V, ensuring safe margin below LNBH23's 40 V absolute maximum rating.
Can this device be used directly on the IF signal line?
No. Due to its intrinsic junction capacitance (~3.5 nF), LNBTVS4-220S must not be placed directly on the IF (RX/TX) coaxial path carrying 950–2150 MHz satellite signals. As specified in ST's application schematics, a series inductance >13 nH must isolate the TVS from the IF connector to prevent RF attenuation while preserving surge protection functionality.
How does its performance change at elevated junction temperatures?
VBR increases linearly with junction temperature at αT = 9.3 × 10⁻⁴ /°C. At 85 °C, VBR rises ~0.56 V above 25 °C value (e.g., 23.1 V → ~23.7 V). Crucially, ST confirms full IEC 61000-4-5 compliance is maintained at Tj = 85 °C using standard SMC footprint - no derating required for consumer-grade thermal environments.
Is lead-free and RoHS compliance verified for this part?
Yes. LNBTVS4-220S is manufactured in an ECOPACK®-compliant SMC package meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. The epoxy molding compound is UL 94 V0 rated, and solderability conforms to MIL-STD-750 Method 2026, supporting lead-free reflow profiles up to 260 °C for 10 seconds.
LNBTVS4-220S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- LNBTVS, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- 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):
- 334A (8/20µs)
- Power - Peak Pulse:
- 22500W (22.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
LNBTVS4-220S FAQ
1.How can I place an order for LNBTVS4-220S through Aetrix?
Please submit a Request for Quotation (RFQ) for LNBTVS4-220S 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 LNBTVS4-220S reliable?
The price and inventory of LNBTVS4-220S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LNBTVS4-220S is usually 5 days.
3.What payment methods are accepted for LNBTVS4-220S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LNBTVS4-220S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LNBTVS4-220S?
LNBTVS4-220S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LNBTVS4-220S 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 LNBTVS4-220S?
For technical support, including LNBTVS4-220S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LNBTVS4-220S requirements.
6.How does Aetrix verify that LNBTVS4-220S is sourced from the original manufacturer or authorized distributors?
All LNBTVS4-220S 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 LNBTVS4-220S meets industry standards.
7.What is the process for return or replacement of LNBTVS4-220S?
All LNBTVS4-220S units undergo pre-shipment inspection (PSI). If there is an issue with LNBTVS4-220S, 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 LNBTVS4-220S part is unused and in its original packaging.
Return procedure for LNBTVS4-220S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LNBTVS4-220S Tags
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