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Vishay General Semiconductor - Diodes Division VTVS31ASMF-M3-08
- Part No.:
- VTVS31ASMF-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS31ASMF-M3-08.pdf
- Description:
- TVS DIODE 30.6VWM 51VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:51,566
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Product details
Overview
VTVS31ASMF-M3-08 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 such as USB, HDMI, and automotive sensor interfaces. 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), and clamps to ≤51 V at rated surge, with ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the VTVS31ASMF-M3-08 datasheet, VTVS31ASMF-M3-08 pinout, VTVS31ASMF-M3-08 application, or VTVS31ASMF-M3-08 equivalent, this device is selected for robust overvoltage protection in space-constrained, high-reliability applications requiring fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification readiness - especially where SOD-123W-compatible footprint and halogen-free compliance are mandatory.
Technical Context
The VTVS31ASMF-M3-08 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 34.2–37.8 V breakdown threshold, diverting transient energy to ground while clamping the protected line to ≤51 V. Its low 20 K/W thermal resistance (RthJL) enables effective power dissipation during 10/1000 μs surges up to 400 W.
It delivers ±30 kV contact/air discharge ESD protection per IEC 61000-4-2 and exhibits 380 pF typical junction capacitance at 0 V, making it suitable for signal lines where capacitance must be balanced against clamping performance. The device is halogen-free and qualified to J-STD-020 MSL level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; sustains repeated 51 A transients without degradation) |
| Stand-off Voltage (VRWM) | 30.6 V (maximum continuous reverse operating voltage before leakage exceeds 0.05 μA) |
| Breakdown Voltage (VBR) | 34.2–37.8 V at IT = 1 mA (tight ±5 % tolerance ensures predictable turn-on across temperature) |
| Clamping Voltage (VC) | ≤51 V at IPPM = 51 A (low clamping ratio of ~1.67×VRWM protects downstream ICs) |
| Junction Capacitance (CD) | 380 pF at VR = 0 V, f = 1 MHz (enables use on moderate-speed data lines like CAN or LIN) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2; eliminates need for external ESD stages) |
| Operating Temperature | −55 °C to +175 °C (supports under-hood automotive and industrial environments) |
| Package | SMF (DO-219AB); compatible with SOD-123W footprint (3.9 × 1.9 × 1.08 mm) |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount case with cathode marking bar; dimensions 3.9 mm × 1.9 mm × 1.08 mm; compatible with wave and reflow soldering (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input/Line side | Connected to protected signal or power rail; carries surge current into diode junction |
| Cathode (Pin 2) | Ground reference | Connected to system ground plane; provides low-inductance return path for transient current |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles automotive load-dump and ISO 7637-2 pulse 1/2a/3a surges without failure |
| ±5 % VBR tolerance | Ensures consistent clamping onset across production lots and temperature (−55 °C to +175 °C) |
| "Low-Noise" fast response | Sub-nanosecond turn-on minimizes voltage overshoot during ESD events |
| Halogen-free & RoHS-compliant | Meets automotive ELV and industrial environmental compliance requirements |
| SOD-123W footprint compatibility | Enables drop-in replacement or layout reuse in existing designs using standard SOD-123 variants |
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 modules exposed to ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp induced surges before they reach MCU ADC inputs. Use Value: Prevents latch-up or damage to 3.3 V/5 V sensor interface ICs during cranking or alternator load dump events. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 ports in infotainment head units against ESD and hot-plug surges. IC Role / Device Role / Timing Role: Bidirectional-capable protection (via dual unidirectional placement) with 380 pF capacitance preserving signal integrity up to 480 Mbps. Use Value: Maintains USB eye diagram margin while meeting IEC 61000-4-2 ±30 kV contact discharge requirement. |
| Industrial PLC Digital I/O | DC Power Rail Protection (12–24 V) |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of optocoupler input, conducting only during >30.6 V excursions. Use Value: Eliminates false triggering and extends optocoupler lifetime under repetitive surge stress (e.g., relay coil switching). |
Use Scenario: Protecting 24 V supply rails feeding microcontrollers and communication ICs in factory automation equipment. IC Role / Device Role / Timing Role: Primary clamping device parallel to bulk capacitor, limiting rail voltage to ≤51 V during 400 W surges. Use Value: Prevents brownout or reset conditions in downstream logic by maintaining stable rail voltage during transient events. |
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 | Higher VRWM (33 V), lower PPPM (400 W same), but larger SMA package (4.5 × 2.7 × 2.2 mm) | Less suitable for ultra-thin PCBs; requires larger pad layout and higher thermal mass | Select when board space allows and legacy SMA footprint is fixed |
| TPSMD33A | Same VRWM (33 V), identical DO-219AB package, but ±10 % VBR tolerance and 350 W rating | Lower surge margin and looser breakdown spec reduce design guardband for critical automotive use | Acceptable for cost-sensitive industrial applications where 400 W and ±5 % are not mandatory |
Compared with SMAJ33A and TPSMD33A, the VTVS31ASMF-M3-08 offers superior thermal performance (20 K/W vs. ~25–30 K/W), tighter VBR tolerance for precise clamping, and halogen-free construction - making it preferred for next-gen automotive and high-reliability industrial designs demanding compact, compliant, and repeatable surge protection.
Availability
VTVS31ASMF-M3-08 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, full traceability, and long-term lifecycle support.
Supply support for VTVS31ASMF-M3-08 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 high-speed, low-capacitance transient protection for modern electronics, with emphasis on AEC-Q101 qualification, compact eSMP® packaging, and stringent ESD/surge performance for safety-critical systems.
FAQ
What is the maximum clamping voltage of the VTVS31ASMF-M3-08 at its rated peak pulse current?
The VTVS31ASMF-M3-08 clamps to a maximum of 51 V when subjected to its rated 51 A peak pulse current (10/1000 μs waveform). This clamping voltage is guaranteed across temperature and ensures protected circuits remain below destructive thresholds during surge events. The VTVS31ASMF-M3-08 achieves this with a low dynamic impedance and fast avalanche response, directly supporting robust system-level EMC compliance.
Is the VTVS31ASMF-M3-08 AEC-Q101 qualified?
The VTVS31ASMF-M3-08 is part of Vishay's AEC-Q101-qualified eSMP® family; while the base VTVS31ASMF variant is qualified, the -M3-08 suffix denotes tape-and-reel packaging (3K per 7″ reel) and RoHS-compliant tin plating. Full AEC-Q101 test reports are available upon request, covering HTOL, TC, UHAST, and ESD testing per stress conditions defined in the qualification standard.
Can the VTVS31ASMF-M3-08 be used for bidirectional protection?
No - the VTVS31ASMF-M3-08 is a unidirectional TVS diode, intended for DC line protection with defined polarity. For bidirectional protection (e.g., AC lines or differential pairs), two VTVS31ASMF-M3-08 devices may be connected anode-to-anode, or a dedicated bidirectional part such as VTVS31BSMF should be selected. Using a single VTVS31ASMF-M3-08 on an AC signal risks forward conduction and failure.
What is the moisture sensitivity level (MSL) of the VTVS31ASMF-M3-08?
The VTVS31ASMF-M3-08 has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it is not humidity-sensitive and may be stored indefinitely at ambient conditions without dry-pack requirements or floor-life limitations. This simplifies handling, assembly planning, and inventory management for high-volume manufacturing.
How does the 380 pF junction capacitance of the VTVS31ASMF-M3-08 affect high-speed signal lines?
The 380 pF typical junction capacitance of the VTVS31ASMF-M3-08 limits usable bandwidth to approximately 100 MHz when placed directly on a signal line - making it appropriate for USB 2.0 (480 Mbps), CAN FD (5 Mbps), and LIN (20 kbps), but unsuitable for USB 3.0 or PCIe. Layout best practices (short traces, ground vias near cathode) minimize added inductance and preserve clamping speed without degrading signal integrity.
VTVS31ASMF-M3-08 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:
- General Purpose
- Capacitance @ Frequency:
- 380pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS31ASMF-M3-08 FAQ
1.How can I place an order for VTVS31ASMF-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS31ASMF-M3-08 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-M3-08 reliable?
The price and inventory of VTVS31ASMF-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS31ASMF-M3-08 is usually 5 days.
3.What payment methods are accepted for VTVS31ASMF-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS31ASMF-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS31ASMF-M3-08?
VTVS31ASMF-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS31ASMF-M3-08 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-M3-08?
For technical support, including VTVS31ASMF-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS31ASMF-M3-08 requirements.
6.How does Aetrix verify that VTVS31ASMF-M3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS31ASMF-M3-08 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-M3-08 meets industry standards.
7.What is the process for return or replacement of VTVS31ASMF-M3-08?
All VTVS31ASMF-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS31ASMF-M3-08, 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-M3-08 part is unused and in its original packaging.
Return procedure for VTVS31ASMF-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS31ASMF-M3-08 Tags
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