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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

STMicroelectronics LNBTVS6-304S

Name: LNBTVS6-304S
Brand: STMicroelectronics
SKU: LNBTVS6-304S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LNBTVS6-304S

Manufacturer:: STMicroelectronics

Category:: TVS Diodes

Package:: DO-214AB, SMC

Datasheet:: LNBTVS6-304S.pdf

Description:: TVS DIODE 28VWM 45VC SMC

Quantity:: RFQ Add To RFQ list

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Inventory:4,896

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Product details

Overview

LNBTVS6-304S 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 ICs. It features 500 A peak pulse current (8/20 µs), 31.5–33 V clamping voltage at 500 A, 28–30 V standoff voltage, 0.2 µA leakage at 25 °C, and operates up to 150 °C junction temperature in SMC (DO-214AB) package.

For engineers reviewing the LNBTVS6-304S datasheet, LNBTVS6-304S pinout, LNBTVS6-304S application, or LNBTVS6-304S equivalent, key selection criteria include IEC 61000-4-5 compliance at 500 A surge, low clamping factor relative to V_BR, compatibility with LNBH23/LNBH25 control ICs, and series-inductor–based RF isolation in IF signal paths.

Technical Context

This TVS diode uses planar junction technology to achieve stable breakdown characteristics and high surge robustness across consumer temperature range (−55 °C to +85 °C ambient). Its unidirectional configuration enables low forward voltage (1.2 V at 3 A) while maintaining 23.1–30 V breakdown voltage range and tight V_CL/V_BR ratio for precise overvoltage clamping.

The device meets IEC 61000-4-2 Level 4 (15 kV air / 8 kV contact discharge), IEC 61000-4-5 (500 A, 12 Ω source), and MIL-STD-883G Class 3B HBM (25 kV), with UL 94 V0 flammability rating and JEDEC DO-214AB footprint compliance-enabling drop-in replacement in existing LNB front-end layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Pulse Current (8/20 µs)	500 A - withstands IEC 61000-4-5 surges up to 6 kV on antenna cable without failure
Clamping Voltage @ 500 A	45 V max - limits transient voltage seen by downstream LNBH regulator during surge event
Standoff Voltage (V_RWM)	28–30 V - blocks normal LNBH output voltage (typically 13–18 V DC + 22 kHz tone) without conduction
Breakdown Voltage (V_BR)	31.5–33 V @ 1 mA - ensures reliable turn-on before damage threshold of protected ICs
Leakage Current @ V_RWM	0.2 µA max at 25 °C - negligible power loss and no interference with 22 kHz DiSEqC signaling
Junction Temperature Range	−55 °C to +150 °C - supports operation in sealed outdoor satellite receiver enclosures
Package	SMC (JEDEC DO-214AB) - standardized footprint compatible with IPC 7531, enabling automated assembly

Pinout & Package

Package: SMC (JEDEC DO-214AB), surface-mount molded plastic case with cathode band marking. Terminals are solder-plated and compliant with MIL-STD-750 Method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input side of unidirectional clamp	Connected to LNBH output rail; conducts only during negative transients (not used in standard LNBH config)
Cathode	Output side / clamping node	Connected to ground via PCB trace; sinks surge current to GND during positive overvoltage events
Cathode Band	Polarity indicator	Visible marking on package body identifying cathode terminal per JEDEC DO-214AB standard

Key Features

Feature	Design Value
Low clamping factor (V_CL/V_BR ≈ 1.43)	Ensures minimal overvoltage overshoot during fast transients, protecting sensitive LNBH gate oxides
Unidirectional architecture with 1.2 V VF @ 3 A	Enables efficient DC path for 22 kHz DiSEqC tone injection without rectification distortion
High surge capability at T_jmax = 150 °C	Maintains 1250 W (10/1000 µs) rating even under worst-case thermal conditions in enclosed receivers
IEC 61000-4-5 compliance at T_j = 85 °C	Validates protection integrity under sustained ambient heat, not just room-temperature lab testing
UL 94 V0 resin and RoHS-compliant construction	Meets global safety and environmental requirements for consumer satellite equipment certification

Applications

Satellite LNB Power Protection

DiSEqC-Controlled Antenna Switching

Use Scenario: Protects LNBH25/LNBH26 regulators in digital satellite receivers against induced lightning surges on coaxial antenna cables.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between LNBH output and ground, activated only during positive overvoltage events above 31.5 V.

Use Value: Limits transient voltage to ≤45 V, preventing latch-up or gate oxide rupture in LNBH ICs rated for 36 V absolute maximum.

Use Scenario: Enables reliable 22 kHz tone transmission through same LNBH output rail used for DC power and surge protection.

IC Role / Device Role / Timing Role: Low-VF anode-cathode path allows bidirectional 22 kHz AC signal coupling while blocking DC overvoltage.

Use Value: 1.2 V forward drop preserves tone amplitude and edge integrity, ensuring >99% DiSEqC command success rate over 100 m coax.

Outdoor Set-Top Box Front-End

Multi-LNB Distribution Hub

Use Scenario: Integrated into weather-sealed outdoor satellite receivers operating continuously at 70 °C ambient.

IC Role / Device Role / Timing Role: Primary surge arrestor on LNB feed line, thermally coupled to copper pour for junction temperature control.

Use Value: Maintains 500 A surge rating at T_j = 85 °C, eliminating derating penalties in compact, fanless enclosures.

Use Scenario: Used in 4-output DiSEqC distribution switches feeding multiple LNBs from single receiver.

IC Role / Device Role / Timing Role: Per-channel TVS on each LNB output path, isolated by series inductors (>13 nH) to preserve RF passband.

Use Value: Intrinsic capacitance <5 pF avoids attenuation of 950–2150 MHz IF signals when combined with proper L-series filtering.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ33A	Same DO-214AA package; 33 V V_BR min, 53.3 V V_CL @ 13.9 A (10/1000 µs); lower IPP (13.9 A vs 500 A)	Rated for lower-energy transients; not validated for IEC 61000-4-5 500 A testing	Select only for non-satellite, low-surge industrial interfaces where 6 kV immunity is not required
SMCJ33A	Same DO-214AB package; 33 V V_BR min, 53.3 V V_CL @ 23.3 A (10/1000 µs); IPP = 23.3 A (10/1000 µs) vs 500 A (8/20 µs)	Lacks LNB-specific validation; no data on 22 kHz tone compatibility or DiSEqC signal integrity	Acceptable for general-purpose DC rail protection but requires revalidation for LNBH interface timing and RF transparency

Compared with SMBJ33A and SMCJ33A, LNBTVS6-304S delivers 36× higher surge current handling, tighter clamping (45 V vs 53.3 V), and documented interoperability with LNBH ICs-including verified 22 kHz tone transmission and integrated series-inductor design guidance.

Availability

LNBTVS6-304S is available at Aetrix Electronics and suitable for satellite receiver manufacturing, DiSEqC-controlled antenna systems, and outdoor LNB distribution hubs requiring stable component supply and full IEC 61000-4-5 compliance.

Supply support for LNBTVS6-304S 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.

LNBTVS6-304S belongs to ST's Transil™ TVS portfolio, engineered specifically for low-noise block (LNB) protection in satellite reception systems-balancing high surge robustness, RF signal transparency, and DiSEqC protocol fidelity.

FAQ

What is the maximum continuous DC voltage this TVS can block in an LNB application?

LNBTVS6-304S has a standoff voltage (V_RWM) of 28–30 V, meaning it reliably blocks continuous DC voltages up to 30 V without significant leakage. This accommodates standard LNBH outputs (13–18 V DC plus 22 kHz tone envelope) while remaining well below its 31.5 V minimum breakdown threshold.

Can this device be placed directly at the IF connector without affecting satellite signal quality?

No-LNBTVS6-304S must not be placed directly at the IF connector due to its intrinsic junction capacitance. Per ST application guidance (Fig. 9), a series inductor (>13 nH) must isolate the TVS from the RF path to prevent attenuation of 950–2150 MHz IF signals while preserving surge protection functionality.

How does its 8/20 µs surge rating compare to standard 10/1000 µs ratings?

LNBTVS6-304S is rated for 500 A under the 8/20 µs waveform (IEC 61000-4-5), which represents faster, higher-power transients than 10/1000 µs. Its 10/1000 µs rating is 67 A, confirming suitability for both lightning-induced surges and slower electrical overstress events in satellite infrastructure.

Is thermal derating required when operating near 150 °C junction temperature?

No additional derating is needed-the datasheet explicitly confirms IEC 61000-4-5 compliance remains valid at T_j = 85 °C, and the device maintains 1250 W (10/1000 µs) peak pulse power at T_jmax = 150 °C, making it suitable for thermally constrained outdoor satellite receiver designs.

LNBTVS6-304S Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: DO-214AB, SMC

Series:: LNBTVS, TRANSIL™

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 28V

Voltage - Breakdown (Min):: 30V

Voltage - Clamping (Max) @ Ipp:: 45V

Current - Peak Pulse (10/1000µs):: 500A (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

LNBTVS6-304S FAQ

1.How can I place an order for LNBTVS6-304S through Aetrix?

Please submit a Request for Quotation (RFQ) for LNBTVS6-304S 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 LNBTVS6-304S reliable?

The price and inventory of LNBTVS6-304S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LNBTVS6-304S is usually 5 days.

3.What payment methods are accepted for LNBTVS6-304S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LNBTVS6-304S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LNBTVS6-304S?

LNBTVS6-304S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LNBTVS6-304S 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 LNBTVS6-304S?

For technical support, including LNBTVS6-304S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LNBTVS6-304S requirements.

6.How does Aetrix verify that LNBTVS6-304S is sourced from the original manufacturer or authorized distributors?

All LNBTVS6-304S 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 LNBTVS6-304S meets industry standards.

7.What is the process for return or replacement of LNBTVS6-304S?

All LNBTVS6-304S units undergo pre-shipment inspection (PSI). If there is an issue with LNBTVS6-304S, 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 LNBTVS6-304S part is unused and in its original packaging.

Return procedure for LNBTVS6-304S:

1.Submit a request within 90 days.

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

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