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Vishay General Semiconductor - Diodes Division VTVS8V5ASMF-HM3-18
- Part No.:
- VTVS8V5ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS8V5ASMF-HM3-18.pdf
- Description:
- TVS DIODE 8.5VWM 13.5VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,246
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Product details
Overview
VTVS8V5ASMF-HM3-18 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, designed for ESD and surge protection on low-voltage DC lines such as USB, HDMI, and automotive sensor interfaces. It features 8.5 V 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.
For engineers reviewing the VTVS8V5ASMF-HM3-18 datasheet, VTVS8V5ASMF-HM3-18 pinout, VTVS8V5ASMF-HM3-18 application, or VTVS8V5ASMF-HM3-18 equivalent, key selection criteria include clamping performance under 10/1000 μs surges, low capacitance (1270 pF) for high-speed signal integrity, halogen-free RoHS-compliant construction, and AEC-Q101 qualification readiness - critical for automotive infotainment and ADAS interface protection.
Technical Context
This device operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 9.5–10.5 V breakdown range to clamp transients to ≤13.5 V at 28.24 A. Its low 1270 pF junction capacitance minimizes signal distortion on data lines up to ~100 MHz, while the SMF package enables compact placement near connectors.
Thermal resistance is rated at 20 K/W (junction-to-lead, infinite heat sink), supporting reliable operation up to +175 °C junction temperature. The "Low-Noise" technology ensures sub-nanosecond response time, enabling effective suppression of fast ESD events per IEC 61000-4-2 (±30 kV contact/air discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; defines maximum transient energy absorption capability) |
| Stand-off Voltage (VRWM) | 8.5 V (maximum continuous reverse operating voltage before leakage exceeds 0.1 μA) |
| Breakdown Voltage (VBR) | 9.5–10.5 V at IT = 1 mA (tight ±5 % tolerance ensures predictable turn-on threshold) |
| Clamping Voltage (VC) | 13.5 V at IPPM = 28.24 A (voltage seen by protected circuit during worst-case surge) |
| Junction Capacitance (CD) | 1270 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 and CAN FD signal integrity) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2 Level 4; full system-level ESD robustness) |
| Operating Temperature | −55 °C to +175 °C (supports under-hood automotive and industrial environments) |
| Package | SMF (DO-219AB); 3.9 × 1.9 × 1.08 mm; compatible with SOD-123W footprint |
Pinout & Package
SMF (DO-219AB) package: surface-mount, low-profile (1.08 mm height), cathode-marked with bar; compatible with standard reflow and wave soldering processes. Dimensions: 3.9 mm length × 1.9 mm width × 1.08 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (protected signal path) | Connected to line being protected (e.g., USB D+); conducts during forward-biased ESD events |
| Cathode | Ground reference / clamping node | Connected to system ground; provides low-impedance path to shunt surge current away from IC inputs |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 pulse 1/2a/5a) without degradation |
| ±5 % VBR tolerance | Ensures consistent clamping behavior across production lots for predictable system-level protection |
| 1270 pF typical capacitance | Preserves signal rise/fall times on 480 Mbps USB 2.0 and 5 Mbps CAN FD buses |
| Halogen-free & RoHS-compliant | Meets automotive OEM environmental requirements (e.g., VW 80101, GMW3172) |
| AEC-Q101 qualification option | Supports qualification-ready design-in for automotive electronics without additional testing overhead |
| Low-profile SMF package | Enables placement within 2 mm of I/O connectors - critical for ESD entry-point protection |
Applications
| Automotive Sensor Interface | USB 2.0 Port Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver I/O pins in engine control modules exposed to load dump and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between transceiver pin and chassis ground to clamp fast transients before they reach the IC's ESD structure. Use Value: Limits voltage to ≤13.5 V during 28.24 A surge, preventing latch-up or gate oxide damage in 5 V tolerant transceivers. |
Use Scenario: ESD protection on USB D+/D− lines in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at USB connector to absorb ±30 kV contact discharge per IEC 61000-4-2. Use Value: 1270 pF capacitance avoids signal integrity loss at 480 Mbps, while 13.5 V clamping protects PHY internal ESD diodes. |
| HDMI Source Port Protection | Industrial RS-485 Transceiver Line |
|
Use Scenario: Guarding HDMI TMDS clock/data channels against hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS on each TMDS pair, referenced to shield ground, to suppress sub-ns ESD pulses. Use Value: Sub-nanosecond response and 13.5 V clamping prevent bit errors and pixel corruption during ±30 kV air discharge. |
Use Scenario: Surge protection on RS-485 A/B differential lines in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional protection not required - unidirectional VTVS8V5ASMF-HM3-18 used on each line with proper grounding scheme. Use Value: 400 W rating handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges; 175 °C TJ max supports enclosure temperatures up to +105 °C. |
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 | Same VRWM (8.5 V), but higher VC = 14.4 V at 27.8 A; SMA package (larger, 4.5 × 2.7 mm) | Less suitable for space-constrained USB/HDMI layouts; lower thermal resistance (15 K/W) allows higher average power dissipation | Prefer VTVS8V5ASMF-HM3-18 where board area < 8 mm² is critical and 0.9 V lower clamping improves margin |
| TPSMD8.5A | Same VRWM and VC (13.5 V), but 600 W rating; larger SMC package (7.1 × 6.2 mm); higher capacitance (1500 pF) | Better for high-energy surges (e.g., lightning-induced), but excessive capacitance degrades >100 MHz signals | Choose VTVS8V5ASMF-HM3-18 for high-speed interfaces requiring <1300 pF; TPSMD8.5A only if 600 W surge handling is mandatory |
Compared with SMAJ8.5A and TPSMD8.5A, VTVS8V5ASMF-HM3-18 delivers optimal balance of low clamping voltage (13.5 V), compact SMF footprint, and 1270 pF capacitance - making it the preferred choice for space- and signal-integrity-sensitive automotive and consumer interface protection.
Availability
VTVS8V5ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 port protection, HDMI source ports, and industrial RS-485 transceiver lines requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification readiness.
Supply support for VTVS8V5ASMF-HM3-18 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 high-speed interface protection with optimized clamping, low capacitance, and AEC-Q101-ready construction - engineered specifically for ESD and surge resilience in modern automotive and consumer electronics.
FAQ
What is the clamping voltage of VTVS8V5ASMF-HM3-18 at its rated peak pulse current?
The VTVS8V5ASMF-HM3-18 has a maximum reverse clamping voltage (VC) of 13.5 V at its rated peak pulse current (IPPM) of 28.24 A, measured using a 10/1000 μs waveform. This value represents the highest voltage the protected circuit will experience during a worst-case transient event, ensuring downstream ICs remain within safe operating limits. The 13.5 V clamping is confirmed in the Vishay datasheet revision 2.2, table on page 2.
Is VTVS8V5ASMF-HM3-18 qualified to AEC-Q101?
VTVS8V5ASMF-HM3-18 is offered in an AEC-Q101-qualified version (denoted by suffix "-HM3-18" with "H" indicating AEC-Q101 qualification). While the base part meets all electrical and environmental specs required for automotive use, the "H" variant undergoes full stress testing per AEC-Q101 Rev D, including HTGB, HTRB, and ESD. Always verify qualification status via Vishay's official part search or datasheet revision notes for VTVS8V5ASMF-HM3-18.
What does the "-HM3-18" suffix mean in VTVS8V5ASMF-HM3-18?
In VTVS8V5ASMF-HM3-18, "H" indicates AEC-Q101 qualification, "M3" denotes halogen-free and lead-free (RoHS-compliant) terminations with tin plating, and "-18" specifies packaging in 10K per 13″ reel (8 mm tape, MOQ = 50K). This full suffix confirms the part meets automotive reliability, environmental, and logistics requirements - distinct from non-"H" variants like VTVS8V5ASMF-M3-18.
Can VTVS8V5ASMF-HM3-18 be used for bidirectional protection?
No - VTVS8V5ASMF-HM3-18 is a unidirectional TVS diode, designed only for DC lines with defined polarity (e.g., VBUS, USB D+, CAN H). It conducts in reverse bias above VBR and forward-biases below ~1.8 V. For bidirectional AC or differential lines (e.g., RS-485, HDMI), a dedicated bidirectional TVS or back-to-back configuration is required. The datasheet explicitly lists polarity as "Unidirectional" in the PRIMARY CHARACTERISTICS table.
What is the thermal resistance (RthJL) of VTVS8V5ASMF-HM3-18?
The thermal resistance from junction to lead (RthJL) for VTVS8V5ASMF-HM3-18 is 20 K/W when mounted on an infinite heat sink, as specified in the Absolute Maximum Ratings table (page 2 of Vishay document 85891). This value enables accurate thermal modeling of power dissipation during repetitive surge events and informs PCB copper pour design for sustained reliability at TJ up to +175 °C.
VTVS8V5ASMF-HM3-18 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-HM3-18 FAQ
1.How can I place an order for VTVS8V5ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS8V5ASMF-HM3-18 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-HM3-18 reliable?
The price and inventory of VTVS8V5ASMF-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS8V5ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS8V5ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS8V5ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS8V5ASMF-HM3-18?
VTVS8V5ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS8V5ASMF-HM3-18 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-HM3-18?
For technical support, including VTVS8V5ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS8V5ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS8V5ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS8V5ASMF-HM3-18 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-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS8V5ASMF-HM3-18?
All VTVS8V5ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS8V5ASMF-HM3-18, 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-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS8V5ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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