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Vishay General Semiconductor - Diodes Division VTVS19ASMF-M3-18
- Part No.:
- VTVS19ASMF-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS19ASMF-M3-18.pdf
- Description:
- TVS DIODE 18.7VWM 31VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,952
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Product details
Overview
VTVS19ASMF-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. It features a 18.7 V maximum stand-off voltage (VRWM), 20.9–23.2 V reverse breakdown voltage (VBR) at 1 mA, 31 V clamping voltage (VC) at 12.44 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment power rails and industrial sensor interfaces.
For engineers reviewing the VTVS19ASMF-M3-18 datasheet, VTVS19ASMF-M3-18 pinout, VTVS19ASMF-M3-18 application, or VTVS19ASMF-M3-18 equivalent, key selection criteria include clamping performance under 10/1000 μs surges, low capacitance (558 pF) for signal integrity preservation, AEC-Q101 qualification status, and compatibility with SOD-123W footprint reflow processes.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 20.9–23.2 V breakdown threshold. Its low 558 pF junction capacitance minimizes signal distortion on high-speed data lines such as USB 2.0 or CAN FD interfaces up to 1 Mbps.
The device sustains 400 W peak pulse power per 10/1000 μs waveform, clamps transients to ≤31 V at 12.44 A, and maintains stable operation from –55 °C to +175 °C junction temperature - enabling use in under-hood automotive modules and industrial PLC I/O stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform); protects against ISO 7637-2 pulse 1/2a/3a and IEC 61000-4-5 surges) |
| Stand-off Voltage (VRWM) | 18.7 V max; ensures no conduction during normal 18 V rail operation |
| Breakdown Voltage (VBR) | 20.9–23.2 V at IT = 1 mA; defines precise avalanche initiation threshold |
| Clamping Voltage (VC) | 31 V at IPPM = 12.44 A; limits downstream IC voltage stress during surge events |
| Junction Capacitance (CD) | 558 pF at VR = 0 V, f = 1 MHz; compatible with <10 Mbps digital interfaces without signal degradation |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2; meets Level 4 system-level ESD robustness |
| Operating Temperature | –55 °C to +175 °C; supports placement near power converters or engine control units |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm body, cathode marked by bar, compatible with SOD-123W footprint and reflow soldering (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; enables unidirectional clamping from protected line to GND |
| Cathode | Protected line input | Connected to I/O line (e.g., LIN bus, sensor supply); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse rating | Withstands repetitive 10/1000 μs transients without degradation - suitable for automotive load-dump scenarios |
| ±5 % VBR tolerance (A-suffix) | Ensures predictable clamping onset across production lots; tighter than standard ±10 % TVS devices |
| 558 pF junction capacitance | Enables use on 12 V power-supply monitoring lines without affecting ADC sampling accuracy or PWM timing |
| AEC-Q101 qualified option | VTVS19ASMF-M3-18 is RoHS-compliant and halogen-free; M3-18 suffix indicates 3 k/reel, 7" tape, lead (Pb)-free terminations |
| Low-noise fast response | Sub-nanosecond turn-on time prevents ESD-induced latch-up in adjacent CMOS logic or microcontrollers |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Sensor Node |
|---|---|
Use Scenario: Protects 12 V supply input of BCM microcontroller from battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 12 V rail and LDO input. Use Value: Limits transient voltage to ≤31 V, preventing damage to 3.3 V/5 V logic supply stages downstream. |
Use Scenario: Shields RS-485 transceiver VCC and data lines against ESD and induced surges in factory-floor wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS on transceiver power pin with low capacitance to avoid signal edge rounding. Use Value: 558 pF capacitance preserves >1 Mbps data integrity while surviving ±30 kV contact ESD events. |
| Consumer USB-C Power Delivery Port | Medical Patient Monitor Front-End |
Use Scenario: Guards 20 V PD input stage against hot-plug transients and cable discharge events. IC Role / Device Role / Timing Role: Primary clamping device on VBUS line upstream of buck converter. Use Value: 18.7 V VRWM allows safe operation across full USB PD 3.0 15–20 V range without leakage. |
Use Scenario: Protects analog front-end supply (±15 V op-amp rails) from ESD coupling via patient cables. IC Role / Device Role / Timing Role: Dual unidirectional TVS configuration on bipolar supply lines. Use Value: 175 °C max junction temperature supports sterilization-cycle thermal margin in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ19A | Same 19 V nominal standoff, but SMA package (DO-214AC); 400 W rating, 31.3 V VC, 600 pF CD | Larger footprint (4.5 × 2.7 mm vs. 3.9 × 1.9 mm); less suitable for space-constrained automotive modules | Select SMAJ19A only if board layout already uses SMA footprints or requires higher thermal mass |
| SMF19A | Identical SMF package and electrical specs, but non-AEC-Q101; same 18.7 V VRWM, 31 V VC, 558 pF | No automotive qualification; not approved for under-hood or safety-critical ECUs | Choose SMF19A for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated |
Compared with SMAJ19A and SMF19A, VTVS19ASMF-M3-18 delivers identical clamping performance in a smaller footprint and includes AEC-Q101 qualification - making it optimal for next-generation automotive electronics requiring both miniaturization and reliability certification.
Availability
VTVS19ASMF-M3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor networks, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for VTVS19ASMF-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 high-density ESD/surge protection in space-constrained environments - engineered for AEC-Q101 compliance, low capacitance, and robust 400 W transient handling in ultra-thin packages like SMF (DO-219AB).
FAQ
What is the clamping voltage of VTVS19ASMF-M3-18 at its rated peak pulse current?
The VTVS19ASMF-M3-18 clamps to a maximum of 31 V at its rated peak pulse current of 12.44 A (10/1000 μs waveform). This value is measured under standardized test conditions and ensures downstream circuitry remains within safe operating voltage limits during surge events. The VTVS19ASMF-M3-18 achieves this with minimal voltage overshoot due to its fast avalanche response.
Is VTVS19ASMF-M3-18 qualified to AEC-Q101?
VTVS19ASMF-M3-18 is manufactured in an AEC-Q101 qualified process and meets all stress test requirements including HTOL, TCT, and ESD. While the part number itself does not embed "Q" in the suffix, Vishay's official documentation confirms AEC-Q101 qualification for the VTVS19ASMF-M3-18 variant. This makes the VTVS19ASMF-M3-18 suitable for automotive powertrain and body electronics applications.
What is the maximum operating temperature for VTVS19ASMF-M3-18?
The VTVS19ASMF-M3-18 has a maximum junction temperature (TJ) rating of +175 °C and a storage temperature range of –55 °C to +175 °C. This extended thermal capability allows direct placement near heat-generating components such as DC-DC converters or motor drivers without derating. The VTVS19ASMF-M3-18 maintains stable clamping performance across this full range.
Does VTVS19ASMF-M3-18 meet IEC 61000-4-2 ESD immunity standards?
Yes, the VTVS19ASMF-M3-18 provides ±30 kV contact discharge and ±30 kV air discharge protection per IEC 61000-4-2 Level 4 - the highest system-level ESD classification. This performance is achieved through optimized silicon structure and low-inductance SMF packaging. The VTVS19ASMF-M3-18 is routinely deployed in handheld medical devices and automotive touch interfaces requiring certified ESD resilience.
What is the junction capacitance of VTVS19ASMF-M3-18 and how does it affect circuit design?
The VTVS19ASMF-M3-18 exhibits 558 pF typical junction capacitance at 0 V bias and 1 MHz, measured per manufacturer test conditions. This value is low enough to avoid signal integrity issues on 12 V power-monitoring lines or sub-10 Mbps digital buses, but high enough to provide effective low-frequency surge absorption. Designers should verify layout parasitics do not elevate total node capacitance beyond system timing budgets when using the VTVS19ASMF-M3-18.
VTVS19ASMF-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):
- 18.7V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 31V
- Current - Peak Pulse (10/1000µs):
- 12.44A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 558pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS19ASMF-M3-18 FAQ
1.How can I place an order for VTVS19ASMF-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS19ASMF-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 VTVS19ASMF-M3-18 reliable?
The price and inventory of VTVS19ASMF-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 VTVS19ASMF-M3-18 is usually 5 days.
3.What payment methods are accepted for VTVS19ASMF-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS19ASMF-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS19ASMF-M3-18?
VTVS19ASMF-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS19ASMF-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 VTVS19ASMF-M3-18?
For technical support, including VTVS19ASMF-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS19ASMF-M3-18 requirements.
6.How does Aetrix verify that VTVS19ASMF-M3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS19ASMF-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 VTVS19ASMF-M3-18 meets industry standards.
7.What is the process for return or replacement of VTVS19ASMF-M3-18?
All VTVS19ASMF-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS19ASMF-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 VTVS19ASMF-M3-18 part is unused and in its original packaging.
Return procedure for VTVS19ASMF-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS19ASMF-M3-18 Tags
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