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Vishay General Semiconductor - Diodes Division VTVS3V3ASMF-M3-08
- Part No.:
- VTVS3V3ASMF-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS3V3ASMF-M3-08.pdf
- Description:
- TVS DIODE 3.3VWM 8.9VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:18,115
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Product details
Overview
VTVS3V3ASMF-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 signal lines with 3.3 V stand-off voltage, ±5 % breakdown tolerance, and 8.9 V clamping at 42.95 A peak pulse current. It delivers robust IEC 61000-4-2 compliance (±30 kV contact/air discharge) in space-constrained interfaces such as USB, HDMI, and automotive sensor inputs.
For engineers reviewing the VTVS3V3ASMF-M3-08 datasheet, VTVS3V3ASMF-M3-08 pinout, VTVS3V3ASMF-M3-08 application, or VTVS3V3ASMF-M3-08 equivalent, key selection criteria include its 3.3 V working voltage, 6.4–7.0 V breakdown range, 2095 pF capacitance at 0 V, 175 °C max junction temperature, and compatibility with SOD-123W footprint for automated assembly.
Technical Context
This TVS diode operates in avalanche mode to clamp transients above its reverse stand-off voltage (VRWM = 3.3 V), with precise breakdown at 6.4–7.0 V (IT = 1 mA) and fast response enabled by "Low-Noise" silicon technology. Its unidirectional polarity supports DC-biased signal paths where reverse conduction must be blocked until clamping threshold is exceeded.
The device sustains 400 W peak pulse power under 10/1000 μs waveform, achieves 8.9 V maximum clamping voltage at 42.95 A IPPM, and maintains thermal resistance of 20 K/W to infinite heat sink. Its halogen-free molding compound and MSL level 1 rating support lead-free reflow soldering up to 260 °C.
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; sets operating margin for 3.3 V logic/signal rails. |
| Breakdown Voltage (VBR) | 6.4–7.0 V at IT = 1 mA - Tight ±5 % tolerance ensures predictable turn-on across production lots. |
| Clamping Voltage (VC) | 8.9 V at IPPM = 42.95 A - Limits transient overvoltage to safe levels for downstream 3.3 V ICs. |
| Peak Pulse Power (PPP) | 400 W (10/1000 μs) - Withstands high-energy surges common in industrial and automotive environments. |
| Capacitance (CD) | 2095 pF at VR = 0 V, f = 1 MHz - High capacitance restricts use to low-speed interfaces (e.g., I²C, CAN, sensor lines), not RF or high-speed data. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Fully protects against human-body-model ESD events without external circuitry. |
| Junction Temperature Range | −55 °C to +175 °C - Enables deployment in under-hood automotive, industrial control, and harsh-environment applications. |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case compatible with SOD-123W footprint; dimensions 3.9 mm × 1.9 mm × 1.08 mm; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Signal return path for clamped transient current | Connected to ground or low-impedance reference; carries full IPPM during surge event. |
| Cathode | Protected line input terminal | Connected to the 3.3 V signal line being protected; blocks reverse current until VBR is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 3 (1 kV surge) on 3.3 V lines without derating. |
| ±30 kV ESD immunity | Eliminates need for additional ESD stages in consumer and automotive infotainment interfaces. |
| Low-profile SMF package | Reduces PCB real estate by 30 % vs. SMA while maintaining same thermal performance as SOD-123W. |
| AEC-Q101 qualification option | Supports automotive-grade reliability requirements (e.g., engine control, ADAS sensors) when ordered with -HM3 suffix. |
| Halogen-free & RoHS-compliant | Meets EU ELV and JIG-101A material restrictions for sustainable electronics manufacturing. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between sensor output and microcontroller ADC input. Use Value: Clamps transients to ≤8.9 V, preserving 3.3 V ADC integrity without adding series resistance or signal delay. |
Use Scenario: Shielding PLC digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge suppression element on 24 V-to-3.3 V level-shifted signal path. Use Value: Absorbs 400 W surges while maintaining <0.05 μA leakage at 3.3 V, ensuring stable logic thresholds. |
| USB 2.0 Data Line Protection | Smart Meter Communication Port |
Use Scenario: Safeguarding D+ and D− lines of embedded USB peripherals against ESD during hot-plug events. IC Role / Device Role / Timing Role: Bidirectional protection achieved using two unidirectional devices back-to-back (not applicable here); this part used for single-rail DC-biased lines only. Use Value: Provides ±30 kV ESD protection without distorting 480 Mbps data eye due to controlled capacitance profile. |
Use Scenario: Securing RS-485 or M-Bus communication ports in utility meters subject to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamping device upstream of integrated transceiver, referenced to local ground. Use Value: Limits induced transients to <9 V before reaching transceiver's 3.3 V supply rail, preventing latch-up. |
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 | Same 3.3 V VRWM, but SMA package (DO-214AC); 400 W rating; 9.1 V VC at 42.7 A; 1500 pF capacitance. | Larger footprint (4.5 × 2.7 mm) limits use in ultra-dense layouts; higher thermal mass improves surge endurance in high-repetition scenarios. | Select when board space allows larger package and higher surge repetition rate is required. |
| TPSMF3.3A | Same SMF package; 3.3 V VRWM; 6.4–7.0 V VBR; 8.9 V VC; but 1200 pF typical capacitance (vs. 2095 pF). | Lower capacitance enables use on higher-speed lines (e.g., CAN FD, 100 Mbps Ethernet PHY side), but lower energy handling (200 W). | Select when signal integrity on >1 Mbps buses is critical and surge energy is limited to <200 W. |
Compared with SMAJ3.3A-E3/57T and TPSMF3.3A, the VTVS3V3ASMF-M3-08 offers the highest capacitance among 3.3 V SMF TVS diodes, making it optimal for low-speed, high-surge-energy applications where layout density is constrained but signal bandwidth is non-critical.
Availability
VTVS3V3ASMF-M3-08 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, smart meter communication ports, and USB peripheral protection requiring stable component supply and long-term lifecycle support.
Supply support for VTVS3V3ASMF-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 eSMP® Series targets compact, high-power transient suppression in space-constrained applications, with emphasis on AEC-Q101 qualification, low-profile packaging, and IEC 61000-4-2/4-5 compliance.
FAQ
What is the maximum clamping voltage of the VTVS3V3ASMF-M3-08 under standard test conditions?
The VTVS3V3ASMF-M3-08 has a maximum reverse clamping voltage (VC) of 8.9 V when subjected to its rated peak pulse current of 42.95 A under the 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and guarantees that protected circuits see no more than 8.9 V during surge events, safeguarding 3.3 V logic interfaces. The VTVS3V3ASMF-M3-08 maintains this clamping performance across its full operating temperature range.
Is the VTVS3V3ASMF-M3-08 suitable for bidirectional signal lines like USB D+ and D−?
No, the VTVS3V3ASMF-M3-08 is a unidirectional TVS diode and is not suitable for true bidirectional data lines without external configuration. It conducts only when cathode voltage exceeds anode by ≥6.4 V, making it appropriate for DC-biased lines (e.g., 3.3 V supply-referenced signals). For USB 2.0 differential pairs, two VTVS3V3ASMF-M3-08 devices may be used in series opposition, but Vishay recommends dedicated bidirectional variants like VTVS3V3BSMF-M3-08 for such applications. The VTVS3V3ASMF-M3-08 itself does not support symmetrical clamping.
Does the VTVS3V3ASMF-M3-08 meet automotive qualification standards?
The base VTVS3V3ASMF-M3-08 is not AEC-Q101 qualified; however, Vishay offers AEC-Q101 qualified versions under ordering codes such as VTVS3V3ASMF-HM3-08 (halogen-free, lead-free, AEC-Q101). The -M3-08 suffix indicates tape-and-reel packaging (3K per 7″ reel) and RoHS compliance, but qualification status depends on the full part number suffix. Always verify qualification via the official Vishay datasheet revision and ordering code before automotive deployment. The VTVS3V3ASMF-M3-08 itself is intended for industrial and commercial use unless explicitly ordered with -HM3.
What is the thermal resistance and maximum junction temperature of the VTVS3V3ASMF-M3-08?
The VTVS3V3ASMF-M3-08 has a thermal resistance (RthJL) of 20 K/W when mounted on an infinite heat sink, and its maximum junction temperature (TJ) is rated at +175 °C. This allows reliable operation in under-hood automotive and industrial environments where ambient temperatures exceed 125 °C. Derating curves in the Vishay datasheet show that at 100 °C ambient, the device retains full 400 W pulse capability with proper PCB copper pour. The VTVS3V3ASMF-M3-08 leverages its DO-219AB package geometry to achieve this thermal performance in a low-profile form factor.
How does the capacitance of the VTVS3V3ASMF-M3-08 affect high-speed signal integrity?
The VTVS3V3ASMF-M3-08 exhibits 2095 pF typical capacitance at 0 V bias and 1 MHz, which introduces significant loading on high-speed signals-limiting practical use to interfaces below ~1 Mbps (e.g., I²C, LIN, slow GPIO). At 3.3 V reverse bias, capacitance drops to ~300 pF, but remains too high for USB 2.0 or HDMI. Signal rise-time degradation and insertion loss become measurable above 10 MHz. For high-speed protection, lower-capacitance alternatives like TPSMF3.3A (1200 pF) or specialized arrays should be considered. The VTVS3V3ASMF-M3-08 is optimized for robustness-not bandwidth.
VTVS3V3ASMF-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- 2095pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS3V3ASMF-M3-08 FAQ
1.How can I place an order for VTVS3V3ASMF-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS3V3ASMF-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 VTVS3V3ASMF-M3-08 reliable?
The price and inventory of VTVS3V3ASMF-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 VTVS3V3ASMF-M3-08 is usually 5 days.
3.What payment methods are accepted for VTVS3V3ASMF-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS3V3ASMF-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS3V3ASMF-M3-08?
VTVS3V3ASMF-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS3V3ASMF-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 VTVS3V3ASMF-M3-08?
For technical support, including VTVS3V3ASMF-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS3V3ASMF-M3-08 requirements.
6.How does Aetrix verify that VTVS3V3ASMF-M3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS3V3ASMF-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 VTVS3V3ASMF-M3-08 meets industry standards.
7.What is the process for return or replacement of VTVS3V3ASMF-M3-08?
All VTVS3V3ASMF-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS3V3ASMF-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 VTVS3V3ASMF-M3-08 part is unused and in its original packaging.
Return procedure for VTVS3V3ASMF-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS3V3ASMF-M3-08 Tags
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