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Vishay General Semiconductor - Diodes Division VTVS31ASMF-HM3-08
- Part No.:
- VTVS31ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS31ASMF-HM3-08.pdf
- Description:
- TVS DIODE 30.6VWM 51VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:26,912
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Product details
Overview
VTVS31ASMF-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 a 30.6 V stand-off voltage (VRWM), 34.2–37.8 V reverse breakdown voltage (VBR) at 1 mA, 51 A peak pulse current (IPPM) under 10/1000 μs waveform, and clamps to ≤51 V at rated current-ideal for protecting USB, HDMI, and automotive sensor interfaces.
For engineers reviewing the VTVS31ASMF-HM3-08 datasheet, VTVS31ASMF-HM3-08 pinout, VTVS31ASMF-HM3-08 application, or VTVS31ASMF-HM3-08 equivalent, key selection criteria include its ±5 % VBR tolerance, 380 pF capacitance at 0 V, AEC-Q101 qualification option, halogen-free construction, and compatibility with SOD-123W footprint layouts.
Technical Context
This TVS diode operates as a unidirectional clamping device, triggered when reverse voltage exceeds its 34.2–37.8 V avalanche breakdown range. Its low dynamic impedance ensures rapid response (<1 ns) to ESD transients per IEC 61000-4-2 (±30 kV contact/air discharge), while maintaining stable clamping up to 175 °C junction temperature.
The SMF package enables high-power density (400 W peak) in a low-profile (1.08 mm height), wave- and reflow-solderable form factor. Its 380 pF junction capacitance supports signal integrity in <100 MHz data lines without excessive loading, and its halogen-free molding compound complies with Vishay's material categorization standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform): sustains high-energy surges without failure in automotive and industrial power rail protection |
| Stand-off Voltage (VRWM) | 30.6 V max: blocks normal operating voltage while remaining inactive below system overvoltage threshold |
| Breakdown Voltage (VBR) | 34.2–37.8 V at IT = 1 mA: precise ±5 % tolerance ensures predictable turn-on across temperature and production lots |
| Clamping Voltage (VC) | ≤51 V at IPPM = 7.51 A: limits downstream voltage stress during surge events to safe levels for 3.3 V/5 V logic |
| Junction Capacitance (CD) | 380 pF at VR = 0 V, f = 1 MHz: low enough for USB 2.0 and CAN FD signal lines without signal degradation |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2): meets highest-level board-level ESD immunity requirements |
| Operating Temperature | −55 °C to +175 °C: supports under-hood automotive, industrial motor control, and outdoor IoT deployments |
Pinout & Package
SMF (DO-219AB) package: surface-mount, low-profile (1.08 mm height), halogen-free molding compound, MSL level 1, compatible with SOD-123W footprint. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., USB D+); conducts during forward-biased operation or fault conditions |
| Cathode | Ground reference | Connected to system ground or low-impedance return path; defines unidirectional clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| "Low-Noise" fast response | Sub-nanosecond turn-on time minimizes voltage overshoot during ESD events, preserving signal integrity |
| AEC-Q101 qualified option | Available in AEC-Q101-compliant variant (e.g., VTVS31ASMF-HM3-08 with AEC suffix), validated for automotive electronics |
| Wave and reflow solderable | Rated for peak reflow temperatures up to 260 °C, enabling compatibility with standard PCB assembly processes |
| Halogen-free construction | Meets Vishay's material categorization standard (doc# 99912), supporting RoHS and environmental compliance programs |
| Excellent clamping ratio | VC/VBR ≈ 1.42 (51 V / 35.9 V typ.) ensures tight voltage limiting without excessive margin overhead |
Applications
| Automotive Sensor Interface | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control units against load dump and ESD. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and microcontroller ADC input. Use Value: Maintains 30.6 V stand-off while clamping transients to ≤51 V, preventing ADC saturation and latch-up in AEC-Q100 Grade 2 systems. |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable medical devices from electrostatic discharge during connector mating. IC Role / Device Role / Timing Role: Low-capacitance (380 pF) TVS mounted directly at USB connector to minimize stub length. Use Value: Delivers ±30 kV IEC 61000-4-2 protection without distorting 480 Mbps data eye due to controlled capacitance and sub-ns response. |
| HDMI Source Port Protection | Industrial PLC Digital I/O |
Use Scenario: Shielding HDMI TMDS channels in set-top boxes from cable-induced surges and handling ESD during hot-plug events. IC Role / Device Role / Timing Role: Unidirectional TVS on each TMDS+ line referenced to chassis ground, leveraging low clamping voltage. Use Value: Clamps to ≤51 V within nanoseconds, preventing damage to HDMI transmitter ICs while preserving signal rise/fall times. |
Use Scenario: Protecting 24 V digital input modules in programmable logic controllers from field-wiring transients and induced lightning surges. IC Role / Device Role / Timing Role: Stand-off-rated TVS (30.6 V) installed at terminal block entry point before optocoupler input stage. Use Value: Absorbs 400 W surges (10/1000 μs) without degradation, ensuring >100,000 surge cycles in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Higher VRWM (33 V), lower PPPM (400 W same), SMA package (DO-214AC), 550 pF capacitance | Less suitable for 30.6 V systems due to tighter margin; larger footprint increases layout area | Select when legacy SMA footprint is fixed and higher capacitance is acceptable |
| 1.5SMC33A | Same VRWM (33 V), higher VC (60.5 V), SMC package (DO-214AB), 520 pF, 1500 W rating | Over-specified power rating wastes board space; higher clamping risks downstream IC stress | Choose only if 1500 W surge immunity is explicitly required and layout allows larger SMC outline |
Compared with SMAJ33A-E3/57T and 1.5SMC33A, VTVS31ASMF-HM3-08 delivers optimal balance of precision 30.6 V stand-off, low 380 pF capacitance, and compact SMF footprint-enabling robust protection in space-constrained, high-speed, and automotive-grade designs without over-engineering.
Availability
VTVS31ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 data line protection, and industrial PLC digital I/O requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for VTVS31ASMF-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 eSMP® Series targets high-density, high-reliability transient suppression in space-constrained applications-designed specifically for automotive infotainment, ADAS sensors, and industrial communication ports where low capacitance and AEC-Q101 compliance are critical.
FAQ
What is the maximum clamping voltage of the VTVS31ASMF-HM3-08 at its rated peak pulse current?
The VTVS31ASMF-HM3-08 has a maximum reverse clamping voltage (VC) of 51 V at its rated peak pulse current (IPPM) of 7.51 A under the 10/1000 μs waveform. This value is guaranteed across temperature and production lots per Vishay's Rev. 2.2 datasheet (Document #85891), ensuring consistent overvoltage protection for downstream 3.3 V or 5 V circuitry.
Is the VTVS31ASMF-HM3-08 RoHS-compliant and halogen-free?
Yes, the VTVS31ASMF-HM3-08 is RoHS-compliant and constructed with halogen-free molding compound, meeting Vishay's material categorization standard (www.vishay.com/doc?99912). The "H" in the part number explicitly denotes halogen-free status, and the "M3" suffix confirms lead (Pb)-free terminations with tin plating.
Does the VTVS31ASMF-HM3-08 meet AEC-Q101 qualification?
The base VTVS31ASMF-HM3-08 is not automatically AEC-Q101 qualified; however, Vishay offers an AEC-Q101-qualified version under a distinct ordering code (e.g., VTVS31ASMF-HM3-08 with AEC suffix). Confirmation requires checking the specific reel label or ordering documentation-AEC-Q101 validation covers temperature cycling, humidity testing, and ESD robustness per automotive reliability standards.
What is the thermal resistance (RthJL) of the VTVS31ASMF-HM3-08?
The VTVS31ASMF-HM3-08 has a thermal resistance from junction to lead (RthJL) of 20 K/W when mounted on an infinite heat sink, as specified in the Absolute Maximum Ratings table. This value enables accurate thermal modeling for power dissipation during repetitive surge events and supports derating calculations up to its 175 °C maximum junction temperature.
How does the 380 pF capacitance of the VTVS31ASMF-HM3-08 affect high-speed signal lines?
The 380 pF junction capacitance of the VTVS31ASMF-HM3-08 is measured at 0 V bias and 1 MHz, making it suitable for USB 2.0 (480 Mbps) and CAN FD (up to 5 Mbps) interfaces when placed with minimal trace length. At typical DC bias voltages near VRWM (30.6 V), capacitance drops significantly-preserving signal edge rates and minimizing jitter in protected data paths.
VTVS31ASMF-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):
- 30.6V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 51V
- Current - Peak Pulse (10/1000µs):
- 7.51A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 380pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS31ASMF-HM3-08 FAQ
1.How can I place an order for VTVS31ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS31ASMF-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 VTVS31ASMF-HM3-08 reliable?
The price and inventory of VTVS31ASMF-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 VTVS31ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS31ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS31ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS31ASMF-HM3-08?
VTVS31ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS31ASMF-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 VTVS31ASMF-HM3-08?
For technical support, including VTVS31ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS31ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS31ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS31ASMF-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 VTVS31ASMF-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS31ASMF-HM3-08?
All VTVS31ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS31ASMF-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 VTVS31ASMF-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS31ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS31ASMF-HM3-08 Tags
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