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Vishay General Semiconductor - Diodes Division VTVS8V5ASMF-HM3-08
- Part No.:
- VTVS8V5ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS8V5ASMF-HM3-08.pdf
- Description:
- TVS DIODE 8.5VWM 13.5VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,740
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Product details
Overview
VTVS8V5ASMF-HM3-08 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, designed for ESD and surge protection of low-voltage DC lines. It features 8.5 V maximum stand-off voltage (VRWM), 9.5–10.5 V reverse breakdown voltage (VBR) at 1 mA, 13.5 V maximum clamping voltage (VC) at 28.24 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity-used in automotive infotainment power rails and USB Type-C port protection.
For engineers reviewing the VTVS8V5ASMF-HM3-08 datasheet, VTVS8V5ASMF-HM3-08 pinout, VTVS8V5ASMF-HM3-08 application, or VTVS8V5ASMF-HM3-08 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance (1270 pF at 0 V), AEC-Q101 qualification status, halogen-free compliance, and compatibility with SOD-123W footprint constraints.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 9.5–10.5 V breakdown range. Its low-noise fast-response design achieves sub-nanosecond turn-on to limit transients before sensitive downstream ICs are damaged.
Rated for 400 W peak pulse power (10/1000 μs), it sustains 28.24 A peak pulse current while clamping to ≤13.5 V, with thermal resistance of 20 K/W to infinite heat sink and operating junction temperature up to +175 °C-enabling use in under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 8.5 V - maximum continuous reverse voltage before leakage exceeds 0.1 μA, defining safe operating margin for 9–12 V supply rails. |
| Breakdown Voltage (VBR) | 9.5–10.5 V at 1 mA - tight ±5 % tolerance ensures predictable triggering across temperature and production lots. |
| Clamping Voltage (VC) | 13.5 V at 28.24 A - limits transient voltage seen by protected ICs during 10/1000 μs surges, preserving logic-level integrity. |
| Peak Pulse Power (PPP) | 400 W - supports robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges in automotive ECUs. |
| Capacitance (CD) | 1270 pF at 0 V - balances ESD suppression capability with signal integrity for low-speed interfaces like CAN, LIN, and sensor buses. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Class 4 requirements for front-panel and connector-level protection. |
| Package | SMF (DO-219AB) - low-profile 3.9 × 1.9 × 1.08 mm surface-mount package compatible with SOD-123W footprint and reflow soldering. |
Pinout & Package
SMF (DO-219AB) package: cathode-marked, 2-terminal unidirectional configuration; dimensions 3.9 mm length × 1.9 mm width × 1.08 mm height; compatible with standard SOD-123W PCB footprints and wave/reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; defines conduction path during reverse transient events. |
| Cathode | Protected line input | Connected to the line being protected (e.g., USB VBUS, CAN_H); carries clamped surge current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables single-device protection against high-energy automotive load dump and inductive switching transients without derating. |
| ±5 % VBR tolerance | Ensures consistent clamping threshold across production batches, reducing system-level validation effort for safety-critical applications. |
| 1270 pF capacitance at 0 V | Minimizes signal distortion on 1–5 Mbps CAN/LIN buses while maintaining effective ESD suppression at connectors. |
| AEC-Q101 qualified option available | Supports automotive-grade reliability requirements including temperature cycling, HTRB, and ESD stress testing per AEC specification. |
| Halogen-free, RoHS-compliant, MSL level 1 | Meets automotive OEM environmental mandates and enables 260 °C lead-free reflow without moisture-induced failure. |
Applications
| Automotive Body Control Module (BCM) Power Input | USB Type-C VBUS Line Protection |
|---|---|
|
Use Scenario: Protects 12 V supply input of BCM from load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused battery rail and DC-DC converter input. Use Value: Limits voltage to ≤13.5 V during 28.24 A surge, preventing overvoltage damage to buck controller and enabling single-stage protection architecture. |
Use Scenario: Shields USB Type-C receptacle VBUS pin from ESD events and hot-plug surges during mating/unmating. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between VBUS and chassis ground, with cathode to VBUS. Use Value: Clamps ±30 kV ESD strikes within <1 ns while adding only 1270 pF loading-preserving USB 2.0 signal integrity and meeting USB-IF compliance. |
| Industrial Sensor Interface (4–20 mA Loop) | Automotive LIN Bus Transceiver Protection |
|
Use Scenario: Safeguards 24 V loop-powered pressure/temperature sensors against field wiring faults and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge clamp on sensor's power input, upstream of precision current regulator. Use Value: Withstands 400 W pulses without degradation, maintaining VRWM margin above 24 V nominal and enabling >100,000 surge cycles per device lifetime. |
Use Scenario: Protects LIN transceiver pins from battery transients and ESD in door module and seat control units. IC Role / Device Role / Timing Role: Low-capacitance TVS on LIN bus line, referenced to local ground near transceiver package. Use Value: 1270 pF capacitance avoids LIN waveform distortion at 19.2 kbps, while ±30 kV ESD rating exceeds ISO 10605 requirements for interior vehicle zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A | Higher clamping voltage (15.0 V at 25.4 A), larger SMA package (4.5 × 2.7 × 2.2 mm), lower PPP (400 W same, but lower IPP). | Less suitable for space-constrained automotive modules where SMF footprint is mandated. | Select VTVS8V5ASMF-HM3-08 when board area is limited and clamping below 14 V is required for 9 V rail protection. |
| TPSMD8.5A | Same VRWM and VBR range, but higher capacitance (1500 pF), non-AEC-Q101 rated, different thermal resistance (25 K/W). | Not recommended for automotive under-hood use due to missing AEC-Q101 qualification and reduced thermal performance. | Choose VTVS8V5ASMF-HM3-08 for AEC-Q101-compliant designs requiring tighter thermal management and lower parasitic capacitance. |
Compared with SMAJ8.5A and TPSMD8.5A, VTVS8V5ASMF-HM3-08 delivers superior board-area efficiency, lower clamping voltage, and verified AEC-Q101 qualification-making it the preferred choice for next-generation automotive electronics where footprint, thermal headroom, and automotive compliance are jointly constrained.
Availability
VTVS8V5ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB Type-C power delivery systems, and LIN bus protection requiring stable component supply and long-term lifecycle support.
Supply support for VTVS8V5ASMF-HM3-08 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The VTVS series targets automotive-grade transient suppression, engineered for AEC-Q101 compliance, high-temperature operation, and precise clamping in space-constrained layouts-addressing ESD and surge protection needs in modern vehicle ECUs and ADAS subsystems.
FAQ
What is the maximum clamping voltage of the VTVS8V5ASMF-HM3-08 under a 10/1000 μs surge?
The VTVS8V5ASMF-HM3-08 has a maximum reverse clamping voltage (VC) of 13.5 V at 28.24 A peak pulse current under the standardized 10/1000 μs waveform. This value is measured per the absolute maximum ratings table in Vishay document 85891 Rev. 2.2 and defines the upper voltage limit imposed on protected circuitry during surge events. The VTVS8V5ASMF-HM3-08 maintains this clamping performance across its full operating temperature range of –55 °C to +175 °C.
Is the VTVS8V5ASMF-HM3-08 AEC-Q101 qualified?
The VTVS8V5ASMF-HM3-08 is part of the AEC-Q101-qualified VTVS family; however, qualification applies specifically to parts ordered with the "H" environmental code (as indicated in the ordering information table). Since "HM3-08" includes the "H" prefix, the VTVS8V5ASMF-HM3-08 meets AEC-Q101 stress test requirements for automotive applications-including HTGB, HTRB, and temperature cycling. Full qualification data is documented in Vishay's AEC-Q101 reports for the SMF package platform.
What is the capacitance of the VTVS8V5ASMF-HM3-08 and how does it affect signal integrity?
The VTVS8V5ASMF-HM3-08 exhibits a typical capacitance (CD) of 1270 pF at 0 V reverse bias and 1 MHz frequency. This value is optimized to balance ESD suppression effectiveness with minimal impact on low-speed digital signals-making it suitable for CAN, LIN, and 4–20 mA sensor interfaces. At 19.2 kbps LIN rates, the VTVS8V5ASMF-HM3-08 introduces negligible rise-time degradation, preserving waveform fidelity without requiring additional filtering or layout compensation.
Can the VTVS8V5ASMF-HM3-08 be used in bidirectional configurations?
No-the VTVS8V5ASMF-HM3-08 is a unidirectional TVS diode, as confirmed by its polarity designation in the primary characteristics table and electrical specifications. It conducts only during reverse-biased overvoltage events and must be oriented with cathode toward the protected line. For bidirectional protection (e.g., AC lines or differential buses), a separate bidirectional variant such as VTVS8V5BSMF would be required-not the VTVS8V5ASMF-HM3-08.
What is the thermal resistance and maximum junction temperature of the VTVS8V5ASMF-HM3-08?
The VTVS8V5ASMF-HM3-08 has a thermal resistance (RthJL) of 20 K/W when mounted on an infinite heat sink, and a maximum junction temperature (TJ) rating of +175 °C. These parameters are specified in the Absolute Maximum Ratings table of Vishay document 85891. The VTVS8V5ASMF-HM3-08 is rated for continuous operation from –55 °C to +175 °C, supporting under-hood automotive placement where ambient temperatures exceed 125 °C and transient power dissipation must be efficiently conducted through the leads.
VTVS8V5ASMF-HM3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.5V
- Voltage - Clamping (Max) @ Ipp:
- 13.5V
- Current - Peak Pulse (10/1000µs):
- 28.24A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 1270pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS8V5ASMF-HM3-08 FAQ
1.How can I place an order for VTVS8V5ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS8V5ASMF-HM3-08 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 VTVS8V5ASMF-HM3-08 reliable?
The price and inventory of VTVS8V5ASMF-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS8V5ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS8V5ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS8V5ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS8V5ASMF-HM3-08?
VTVS8V5ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS8V5ASMF-HM3-08 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 VTVS8V5ASMF-HM3-08?
For technical support, including VTVS8V5ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS8V5ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS8V5ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS8V5ASMF-HM3-08 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 VTVS8V5ASMF-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS8V5ASMF-HM3-08?
All VTVS8V5ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS8V5ASMF-HM3-08, 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 VTVS8V5ASMF-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS8V5ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS8V5ASMF-HM3-08 Tags
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