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Vishay General Semiconductor - Diodes Division VTVS3V3ASMF-HM3-18
- Part No.:
- VTVS3V3ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS3V3ASMF-HM3-18.pdf
- Description:
- TVS DIODE 3.3VWM 8.9VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,591
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Product details
Overview
VTVS3V3ASMF-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 of low-voltage signal lines. It features a 3.3 V stand-off voltage (VRWM), 6.4–7.0 V reverse breakdown voltage (VBR) at 1 mA, ±5 % VBR tolerance, 8.9 V maximum clamping voltage (VC) at 42.95 A peak pulse current, and 2095 pF typical junction capacitance - ideal for USB 2.0, HDMI, and automotive sensor interface protection.
For engineers reviewing the VTVS3V3ASMF-HM3-18 datasheet, VTVS3V3ASMF-HM3-18 pinout, VTVS3V3ASMF-HM3-18 application, or VTVS3V3ASMF-HM3-18 equivalent, key selection criteria include clamping performance under 10/1000 μs surges, IEC 61000-4-2 ±30 kV ESD immunity, halogen-free SOD-123W-compatible packaging, and AEC-Q101 qualification status for automotive use.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 6.4–7.0 V breakdown range. Its low 3.3 V working voltage enables protection of 3.3 V logic and analog circuits without false triggering during normal operation.
The device delivers 400 W peak pulse power (10/1000 μs), clamps to ≤8.9 V at 42.95 A, and exhibits 2095 pF capacitance at 0 V - a trade-off optimized for robustness over ultra-high-speed signal integrity. It is rated for -55 °C to +175 °C junction temperature and qualified to AEC-Q101 when specified with "H" code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 3.3 V - maximum continuous reverse voltage before leakage exceeds 0.05 µA; matches 3.3 V I/O rail systems. |
| Breakdown Voltage (VBR) | 6.4–7.0 V at IT = 1 mA, ±5 % tolerance - ensures reliable turn-on margin above VRWM while avoiding premature conduction. |
| Clamping Voltage (VC) | ≤8.9 V at IPPM = 42.95 A (10/1000 μs) - limits transient voltage seen by protected ICs to safe levels during surge events. |
| Peak Pulse Power (PPP) | 400 W - sustains high-energy transients common in automotive load-dump or industrial EFT environments. |
| Junction Capacitance (CD) | 2095 pF at VR = 0 V, f = 1 MHz - suitable for DC-coupled or low-speed interfaces (e.g., CAN, LIN, sensor buses), not RF or USB 3.0. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for end-equipment compliance. |
| Operating Temperature | -55 °C to +175 °C - supports under-hood automotive, industrial control, and harsh-environment applications. |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount case compatible with SOD-123W footprint; cathode marked by bar on top surface; dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (pin 1) | Ground reference terminal | Connected to system ground; forms return path for clamped surge current. |
| Cathode (pin 2) | Protected line terminal | Connected to signal line being protected (e.g., USB D+, HDMI TMDS+); conducts avalanche current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients in automotive and industrial environments without derating at elevated temperatures. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for external ESD staging in consumer and automotive electronics meeting CISPR 25 Class 5 or ISO 10605 requirements. |
| Low-profile SMF (DO-219AB) package | Reduces PCB real estate vs. SMA/SMB; compatible with automated SMT assembly and reflow profiles up to 260 °C peak. |
| AEC-Q101 qualification option | Confirms reliability for automotive applications including engine control, ADAS sensors, and infotainment interfaces. |
| Halogen-free, RoHS-compliant construction | Meets EU Directive 2011/65/EU and JESD201 whisker testing Class 2, supporting green manufacturing and long-term supply stability. |
Applications
| Automotive Sensor Interface | USB 2.0 Data Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional transient clamp placed between sensor output and microcontroller ADC input or transceiver pin. Use Value: Limits induced surges to ≤8.9 V, preventing latch-up or damage to 3.3 V tolerant inputs while maintaining <0.05 µA leakage at 3.3 V. |
Use Scenario: Safeguarding USB 2.0 D+/D- lines in automotive infotainment head units and industrial docking stations against ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in back-to-back configuration) or single-line clamp on each data line. Use Value: Withstands ±30 kV contact ESD per IEC 61000-4-2 and clamps 10/1000 μs surges to <9 V, preserving signal integrity below USB 2.0 eye diagram mask thresholds. |
| HDMI Sink Port Protection | Industrial PLC Digital I/O |
|
Use Scenario: Shielding HDMI TMDS channels in set-top boxes and display controllers from hot-plug transients and nearby ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS on each TMDS+ line referenced to ground, leveraging low capacitance for minimal signal distortion. Use Value: 2095 pF capacitance maintains acceptable rise/fall time degradation for 1.65 Gbps HDMI 1.3 signals; clamping action prevents receiver IC damage during plug/unplug. |
Use Scenario: Guarding 3.3 V digital input channels on programmable logic controllers against field-induced surges and relay coil flyback in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between field wiring and optocoupler input or MCU GPIO pin. Use Value: 3.3 V VRWM ensures no false triggering during nominal operation; 400 W rating handles repetitive 10/1000 μs transients per IEC 61000-4-4 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A-E3/57T | Higher VRWM (3.3 V) but lower PPP (400 W same), higher VC (11.2 V at 32.9 A), SMC package (larger footprint) | Less effective clamping for sensitive 3.3 V receivers; requires more PCB area | Select when legacy SMC layout exists and tighter clamping is not required. |
| TPD4E001DPYR | Quad-channel, 12 pF per channel, lower PPP (120 W), 3.6 V VRWM, DFN package | Better for high-speed data (USB 2.0, HDMI), but insufficient for high-energy surges | Prefer for space-constrained multi-line protection where ESD dominates over surge. |
Compared with SMAJ3.3A-E3/57T and TPD4E001DPYR, VTVS3V3ASMF-HM3-18 provides superior clamping (8.9 V vs. 11.2 V) and surge robustness (42.95 A vs. 32.9 A) in a smaller SMF package, making it optimal for automotive-grade 3.3 V interface protection where both ESD and high-energy transients must be addressed.
Availability
VTVS3V3ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 data line protection, HDMI sink port hardening, and industrial PLC digital I/O requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for VTVS3V3ASMF-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 eSMP® Series targets high-power transient suppression in compact packages, with design focus on AEC-Q101-qualified robustness, low-clamp performance, and compatibility with modern SMT assembly processes.
FAQ
What is the clamping voltage of VTVS3V3ASMF-HM3-18 at its rated peak pulse current?
The VTVS3V3ASMF-HM3-18 clamps to a maximum of 8.9 V at its rated peak pulse current of 42.95 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document 85891, Rev. 2.2) and defines the upper voltage limit imposed on protected circuitry during surge events. The low clamping level directly protects 3.3 V logic and analog inputs from overvoltage damage.
Is VTVS3V3ASMF-HM3-18 AEC-Q101 qualified?
VTVS3V3ASMF-HM3-18 includes the "H" prefix in its ordering code, indicating AEC-Q101 qualification per Vishay's specification. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - confirming suitability for automotive applications such as engine control units, body electronics, and ADAS sensor interfaces. Full test reports are available upon request from Vishay.
What does the "HM3-18" suffix mean in VTVS3V3ASMF-HM3-18?
In VTVS3V3ASMF-HM3-18, "H" denotes AEC-Q101 qualification, "M" indicates halogen-free material compliance, "3" specifies lead (Pb)-free tin plating, and "18" identifies 10k per 13″ reel packaging with 8 mm tape width. This full suffix confirms environmental compliance (RoHS, halogen-free), automotive reliability, and logistics readiness for high-volume SMT production.
Can VTVS3V3ASMF-HM3-18 be used for bidirectional protection?
VTVS3V3ASMF-HM3-18 is a unidirectional TVS diode and is not inherently bidirectional. However, it can be deployed in a back-to-back configuration (two devices anode-to-anode) to achieve symmetrical clamping for AC-coupled or bidirectional signal lines like USB D+ and D-. This approach preserves its 3.3 V VRWM and 8.9 V clamping performance while enabling ±30 kV ESD protection on both polarities.
What is the thermal resistance (RthJL) of VTVS3V3ASMF-HM3-18?
The thermal resistance from junction to lead (RthJL) of VTVS3V3ASMF-HM3-18 is 20 K/W when mounted on an infinite heat sink, as specified in the Absolute Maximum Ratings table of the Vishay datasheet. This parameter governs temperature rise under sustained power dissipation and informs derating curves for repetitive surge conditions - critical for designs operating near 175 °C maximum junction temperature.
VTVS3V3ASMF-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):
- 3.3V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 8.9V
- Current - Peak Pulse (10/1000µs):
- 42.95A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 2095pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS3V3ASMF-HM3-18 FAQ
1.How can I place an order for VTVS3V3ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS3V3ASMF-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 VTVS3V3ASMF-HM3-18 reliable?
The price and inventory of VTVS3V3ASMF-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 VTVS3V3ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS3V3ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS3V3ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS3V3ASMF-HM3-18?
VTVS3V3ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS3V3ASMF-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 VTVS3V3ASMF-HM3-18?
For technical support, including VTVS3V3ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS3V3ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS3V3ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS3V3ASMF-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 VTVS3V3ASMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS3V3ASMF-HM3-18?
All VTVS3V3ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS3V3ASMF-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 VTVS3V3ASMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS3V3ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS3V3ASMF-HM3-18 Tags
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