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Vishay General Semiconductor - Diodes Division VTVS12ASMF-M3-18
- Part No.:
- VTVS12ASMF-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS12ASMF-M3-18.pdf
- Description:
- TVS DIODE 12.4VWM 20.1VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,232
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Product details
Overview
VTVS12ASMF-M3-18 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 DC lines such as USB, HDMI, and automotive sensor interfaces. It features 12.4 V stand-off voltage (VRWM), 14.0–15.4 V reverse breakdown (VBR), 20.1 V clamping voltage (VC) at 19.01 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the VTVS12ASMF-M3-18 datasheet, VTVS12ASMF-M3-18 pinout, VTVS12ASMF-M3-18 application, or VTVS12ASMF-M3-18 equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for space-constrained board-level protection where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.43), and reflow-compatible SOD-123W-compatible packaging are critical.
Technical Context
This unidirectional TVS operates by avalanche breakdown above VRWM to clamp transients while maintaining low leakage (<0.05 μA) below 12.4 V. Its 10/1000 μs waveform-rated 400 W peak pulse power and 20 K/W thermal resistance enable robust surge handling without thermal runaway in compact layouts.
The device uses "Low-Noise" silicon technology for sub-nanosecond response, achieving 20.1 V clamping at 19.01 A with only 807 pF junction capacitance at 0 V - optimized for high-speed data lines requiring minimal signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 12.4 V - maximum continuous reverse operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 14.0–15.4 V at 1 mA - precise avalanche threshold with ±5 % tolerance |
| Clamping Voltage (VC) | 20.1 V at 19.01 A (10/1000 μs) - limits transient voltage seen by protected ICs |
| Peak Pulse Power (PPP) | 400 W - sustains high-energy surges per IEC 61000-4-5 Level 4 without failure |
| Junction Capacitance (CD) | 807 pF at 0 V, 1 MHz - low enough for USB 2.0 and CAN FD signal integrity |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds industrial and automotive requirements |
| Operating Temperature | −55 °C to +175 °C - supports under-hood automotive and industrial environments |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, compatible with SOD-123W footprint and reflow soldering (peak 260 °C). Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference plane; completes clamping loop during surge |
| Cathode | Protected line connection | Connected to signal/power line being safeguarded; conducts when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 surges up to 4 A (2 Ω source) |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for external ESD staging in consumer and automotive infotainment ports |
| 807 pF junction capacitance | Preserves signal rise time in 480 Mbps USB 2.0 links with <0.5 dB insertion loss at 100 MHz |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and ADAS sensor interfaces |
| Halogen-free, RoHS-compliant | Meets IPC-1752A material declaration requirements for Tier 1 automotive supply chains |
Applications
| USB 2.0 Port Protection | Automotive LIN Bus Interface |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of USB 2.0 host/device connectors from ESD events during hot-plug and system integration. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between signal line and ground, responding within <1 ns to limit voltage to ≤20.1 V. Use Value: Prevents latch-up or gate oxide damage in USB transceivers (e.g., TUSB2036) while adding only 807 pF loading. |
Use Scenario: Safeguarding LIN transceiver inputs (e.g., TJA1020) against load dump and ESD in vehicle door modules and seat controls. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across LIN bus and chassis ground, conducting only during transients >12.4 V. Use Value: Maintains LIN signal integrity (20.2 kbps) with no DC loading and withstands −55 °C to +175 °C ambient extremes. |
| Industrial Sensor Signal Conditioning | Smartphone Camera Module Interface |
|
Use Scenario: Shielding analog outputs (0–10 V, 4–20 mA) of pressure/temperature sensors from field-induced surges in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤0.05 μA) TVS placed at sensor PCB edge, clamping transients before op-amp input stage. Use Value: Ensures measurement accuracy remains unaffected during normal operation while surviving 400 W surges per IEC 61000-4-4. |
Use Scenario: ESD protection for MIPI CSI-2 data lanes between image sensor and application processor in mobile devices. IC Role / Device Role / Timing Role: High-speed unidirectional TVS with 807 pF capacitance, mounted directly at connector to minimize stub length. Use Value: Passes ±30 kV IEC 61000-4-2 testing without pixel noise or frame drop, preserving 1.5 Gbps link performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Higher clamping voltage (20.9 V), larger SMA package (4.5 × 2.7 mm), 400 W rating | Less suitable for ultra-thin mobile or automotive modules due to 2.2× height and footprint | Select when legacy SMA layout exists and 0.8 V higher VC is acceptable |
| TPSMF12A | Same SMF package, but 1000 W rating, higher IR (1 μA), 22.5 V VC at 43.5 A | Better for high-energy surges (e.g., ISO 7637-2 Pulse 5a), overkill for ESD-only use cases | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 |
Compared with SMAJ12A and TPSMF12A, VTVS12ASMF-M3-18 delivers optimal balance of low profile (1.08 mm height), tight VBR tolerance (±5 %), and precision clamping (20.1 V) for ESD-critical, space-constrained designs - making it preferred for next-gen USB-C, LIN, and MIPI interfaces where layout area and signal fidelity are constrained.
Availability
VTVS12ASMF-M3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive LIN bus safeguarding, and industrial sensor signal conditioning requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for VTVS12ASMF-M3-18 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 board-level ESD and surge protection with optimized clamping, low capacitance, and AEC-Q101 qualification - engineered specifically for high-speed data lines and harsh-environment electronics.
FAQ
What is the maximum clamping voltage of the VTVS12ASMF-M3-18 under standard test conditions?
The VTVS12ASMF-M3-18 has a maximum reverse clamping voltage (VC) of 20.1 V when subjected to a 10/1000 μs waveform with a peak pulse current of 19.01 A. This value is measured per JEDEC standards and ensures downstream ICs see limited overvoltage during surge events. The VTVS12ASMF-M3-18 maintains this clamping performance across its full operating temperature range (−55 °C to +175 °C).
Is the VTVS12ASMF-M3-18 suitable for automotive applications?
Yes, the VTVS12ASMF-M3-18 is AEC-Q101 qualified and rated for junction temperatures up to +175 °C, making it suitable for under-hood and cabin automotive applications including LIN bus protection, sensor interfaces, and infotainment port ESD hardening. Its halogen-free, RoHS-compliant construction meets Tier 1 automotive material requirements.
Does the VTVS12ASMF-M3-18 support automated assembly processes?
Yes, the VTVS12ASMF-M3-18 is fully compatible with wave and reflow soldering, including lead-free profiles with peak temperatures up to 260 °C. Its SMF (DO-219AB) package conforms to SOD-123W footprint standards and is supplied on 8 mm tape-and-reel (3K per 7″ reel), enabling seamless integration into high-volume SMT lines.
How does the capacitance of the VTVS12ASMF-M3-18 affect high-speed signal integrity?
The VTVS12ASMF-M3-18 exhibits 807 pF typical junction capacitance at 0 V and 1 MHz, which is carefully balanced to minimize signal distortion on moderate-speed digital lines like USB 2.0 (480 Mbps) and LIN (20.2 kbps). Its low capacitance avoids excessive rise-time degradation while delivering robust ESD clamping - verified in application circuits with TUSB2036 and TJA1020 transceivers.
What is the polarity configuration of the VTVS12ASMF-M3-18?
The VTVS12ASMF-M3-18 is a unidirectional TVS diode, meaning it functions as a reverse-biased clamp: it blocks voltages up to 12.4 V (VRWM) in normal operation and conducts only when a positive transient exceeds the 14.0–15.4 V breakdown range. The cathode is marked by a bar on the package top surface and must be connected to the protected line.
VTVS12ASMF-M3-18 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):
- 12.4V
- Voltage - Breakdown (Min):
- 14V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 19.01A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 807pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS12ASMF-M3-18 FAQ
1.How can I place an order for VTVS12ASMF-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS12ASMF-M3-18 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 VTVS12ASMF-M3-18 reliable?
The price and inventory of VTVS12ASMF-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS12ASMF-M3-18 is usually 5 days.
3.What payment methods are accepted for VTVS12ASMF-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS12ASMF-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS12ASMF-M3-18?
VTVS12ASMF-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS12ASMF-M3-18 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 VTVS12ASMF-M3-18?
For technical support, including VTVS12ASMF-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS12ASMF-M3-18 requirements.
6.How does Aetrix verify that VTVS12ASMF-M3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS12ASMF-M3-18 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 VTVS12ASMF-M3-18 meets industry standards.
7.What is the process for return or replacement of VTVS12ASMF-M3-18?
All VTVS12ASMF-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS12ASMF-M3-18, 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 VTVS12ASMF-M3-18 part is unused and in its original packaging.
Return procedure for VTVS12ASMF-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS12ASMF-M3-18 Tags
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