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Vishay General Semiconductor - Diodes Division VTVS40ASMF-M3-08
- Part No.:
- VTVS40ASMF-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS40ASMF-M3-08.pdf
- Description:
- TVS DIODE 39.6VWM 67VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:52,979
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Product details
Overview
VTVS40ASMF-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 39.6 V maximum stand-off voltage (VRWM), 44.7–49.4 V reverse breakdown voltage (VBR) at 1 mA, 67 A peak pulse current (IPPM), and clamps to ≤67 V at rated pulse, with ±5 % VBR tolerance.
For engineers reviewing the VTVS40ASMF-M3-08 datasheet, VTVS40ASMF-M3-08 pinout, VTVS40ASMF-M3-08 application, or VTVS40ASMF-M3-08 equivalent, this device is selected for robust IEC 61000-4-2 ±30 kV contact/air discharge compliance, low-profile SOD-123W-compatible footprint, and high-temperature operation up to +175 °C junction temperature in space-constrained industrial and automotive PCBs.
Technical Context
This TVS diode operates in avalanche mode to clamp transient overvoltages above its VRWM while maintaining low leakage (<0.05 μA) under normal bias. Its 1.08 mm height and DO-219AB outline enable placement on dense layouts without compromising thermal performance-RthJL is 20 K/W when mounted on an infinite heat sink.
The device delivers fast response time via "Low-Noise" technology and achieves stable clamping across -55 °C to +175 °C operating range. Its halogen-free molding compound and MSL level 1 rating support lead-free reflow soldering at peak temperatures up to 260 °C.
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) | 39.6 V (maximum continuous reverse voltage before significant leakage; sets operating margin for 36 V nominal systems) |
| Breakdown Voltage (VBR) | 44.7–49.4 V at IT = 1 mA (±5 % tolerance; ensures predictable turn-on threshold for overvoltage events) |
| Clamping Voltage (VC) | ≤67 V at IPPM = 5.7 A (measured clamping level during full-rated surge; determines protected circuit's worst-case stress) |
| Capacitance (CD) | 309 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 signal integrity; impacts high-speed data line insertion loss) |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 (enables single-device protection against human-body-model surges without external filtering) |
| Operating Temperature | -55 °C to +175 °C (supports under-hood automotive, industrial control, and power supply applications without derating) |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount case with cathode bar marking; compatible with SOD-123W footprint and reflow/wave soldering processes. Dimensions: 3.9 × 1.9 × 1.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., USB D+); conducts surge current toward ground path when V > VBR |
| Cathode | Current exit terminal during clamping | Connected to system ground; polarity-sensitive-reverse connection disables protection function |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables protection against severe transients like ISO 7637-2 Pulse 1/2a in 12 V automotive systems without cascaded devices |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary ESD components in consumer port interfaces (e.g., HDMI, USB-C CC lines) |
| Low-profile DO-219AB package | Reduces board area by ~30 % vs. SMA; fits beneath connectors and in tight spacing around microcontroller I/O pins |
| Halogen-free & RoHS-compliant | Meets automotive OEM material requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) and EU environmental directives |
| AEC-Q101 qualified option available | Supports qualification-ready BOMs for automotive ECUs-though VTVS40ASMF-M3-08 itself is standard industrial grade |
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 load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to shunt transients before reaching MCU ADC input or op-amp buffer. Use Value: Clamps 39.6 V stand-off line to ≤67 V during 5.7 A surge, preserving signal integrity and preventing latch-up in 5 V tolerant analog front-ends. |
Use Scenario: Safeguarding USB 2.0 D+ and D- lines in portable medical devices against ESD events during cable insertion and handling. IC Role / Device Role / Timing Role: Bidirectional protection not required-unidirectional configuration minimizes capacitance impact on 480 Mbps eye diagram. Use Value: 309 pF capacitance at 0 V bias maintains <1 dB insertion loss at 240 MHz, meeting USB-IF signal integrity thresholds without series resistors. |
| Industrial PLC Digital Input | DC Power Rail Surge Suppression |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Stand-off voltage matched to 24 V nominal rail; placed upstream of optocoupler input to prevent false triggering. Use Value: Withstands repeated 400 W pulses without degradation-validated for >1000 surges per IEC 61000-4-5 Level 3 (1 kV/2 Ω) |
Use Scenario: Secondary-level clamping on 36 V auxiliary power rails in telecom base stations after primary MOV-based protection. IC Role / Device Role / Timing Role: Fast-response TVS absorbing residual fast-rising edges that bypass slower primary protectors. Use Value: 67 V clamping voltage ensures downstream DC-DC converters (e.g., 3.3 V LDOs) remain within absolute maximum ratings during combined lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/57T | Same VRWM (40 V), but higher VC (64.5 V @ 6.2 A) and larger SMA package (4.5 × 2.7 × 2.2 mm) | Less suitable for ultra-thin designs; higher thermal resistance (RthJA ≈ 50 K/W vs. 20 K/W junction-to-lead) | Select when legacy SMA footprint compatibility is required and board height >2.2 mm is acceptable |
| 1.5SMC40A | Higher PPPM (1500 W), but larger SMC package (7.1 × 6.2 × 2.6 mm) and 3× board area | Over-specified for low-energy ESD; better suited for AC mains or high-energy automotive load dump | Choose only if system-level testing requires >1000 W surge handling and space permits large footprint |
Compared with SMAJ40A-E3/57T and 1.5SMC40A, VTVS40ASMF-M3-08 offers optimal balance of compact size, precise 39.6 V stand-off matching 36 V systems, and verified 400 W capability-making it preferred for modern space- and thermal-constrained DC interface protection where exact VRWM alignment and low capacitance matter.
Availability
VTVS40ASMF-M3-08 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 data line protection, industrial PLC digital inputs, and DC power rail surge suppression requiring stable component supply across production lifecycles.
Supply support for VTVS40ASMF-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 TransZorb® TVS family-including VTVS40ASMF-M3-08-is engineered for fast, repeatable clamping in harsh electromagnetic environments, targeting ESD-critical interfaces and power-supply input stages in safety- and reliability-driven applications.
FAQ
What is the maximum clamping voltage of the VTVS40ASMF-M3-08 during a 10/1000 μs surge?
The VTVS40ASMF-M3-08 clamps to a maximum of 67 V when subjected to its rated 5.7 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured at the device terminals and represents the worst-case voltage seen by downstream circuitry during full-rated transient events. The clamping behavior is consistent across its -55 °C to +175 °C operating range, making VTVS40ASMF-M3-08 suitable for under-hood automotive use.
Is the VTVS40ASMF-M3-08 RoHS-compliant and halogen-free?
Yes, the VTVS40ASMF-M3-08 uses a halogen-free molding compound and meets RoHS Directive 2011/65/EU requirements. Its material categorization complies with Vishay's standard for environmentally conscious manufacturing, and it supports lead-free reflow soldering at peak temperatures up to 260 °C per J-STD-020. Full compliance documentation, including test reports, is available upon request for VTVS40ASMF-M3-08.
Does the VTVS40ASMF-M3-08 have AEC-Q101 qualification?
The VTVS40ASMF-M3-08 is offered in both standard industrial and AEC-Q101 qualified versions. While the -M3-08 suffix denotes tape-and-reel packaging (3K per 7″ reel), AEC-Q101 qualification is indicated by an additional "-HM3-08" or "-HM3-18" ordering code. Engineers specifying VTVS40ASMF-M3-08 for automotive applications should verify the full part number includes the "H" prefix to ensure qualification for automotive-grade reliability testing.
What is the typical junction-to-lead thermal resistance (RthJL) of the VTVS40ASMF-M3-08?
The VTVS40ASMF-M3-08 has a thermal resistance of 20 K/W from junction to lead (RthJL) when mounted on an infinite heat sink. This low value enables efficient heat dissipation during repetitive surge events and supports reliable operation at +175 °C junction temperature. For PCB-level thermal design, RthJA is application-dependent but typically exceeds 100 K/W-hence proper copper pour and thermal vias are recommended for high-duty-cycle use of VTVS40ASMF-M3-08.
How does the capacitance of VTVS40ASMF-M3-08 affect high-speed signal lines?
VTVS40ASMF-M3-08 exhibits 309 pF typical capacitance at 0 V bias and 1 MHz, which is optimized for DC and low-frequency signal protection. When applied to USB 2.0 (480 Mbps), this capacitance introduces minimal insertion loss (<1 dB at 240 MHz) and preserves signal integrity without requiring series impedance tuning. However, it is not recommended for USB 3.0 or HDMI 2.0 differential pairs where sub-1 pF capacitance is required-VTVS40ASMF-M3-08 is best deployed on single-ended control or power lines.
VTVS40ASMF-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):
- 39.6V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 67V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 309pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS40ASMF-M3-08 FAQ
1.How can I place an order for VTVS40ASMF-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS40ASMF-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 VTVS40ASMF-M3-08 reliable?
The price and inventory of VTVS40ASMF-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 VTVS40ASMF-M3-08 is usually 5 days.
3.What payment methods are accepted for VTVS40ASMF-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS40ASMF-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS40ASMF-M3-08?
VTVS40ASMF-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS40ASMF-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 VTVS40ASMF-M3-08?
For technical support, including VTVS40ASMF-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS40ASMF-M3-08 requirements.
6.How does Aetrix verify that VTVS40ASMF-M3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS40ASMF-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 VTVS40ASMF-M3-08 meets industry standards.
7.What is the process for return or replacement of VTVS40ASMF-M3-08?
All VTVS40ASMF-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS40ASMF-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 VTVS40ASMF-M3-08 part is unused and in its original packaging.
Return procedure for VTVS40ASMF-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS40ASMF-M3-08 Tags
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