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Vishay General Semiconductor - Diodes Division VTVS19ASMF-M3-08
- Part No.:
- VTVS19ASMF-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS19ASMF-M3-08.pdf
- Description:
- TVS DIODE 18.7VWM 31VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:29,855
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Product details
Overview
VTVS19ASMF-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. 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 USB Type-C port protection.
For engineers reviewing the VTVS19ASMF-M3-08 datasheet, VTVS19ASMF-M3-08 pinout, VTVS19ASMF-M3-08 application, or VTVS19ASMF-M3-08 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, thermal resistance (20 K/W), junction temperature range (–55 °C to +175 °C), and halogen-free, AEC-Q101-qualified construction for automotive-grade reliability.
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 31 V clamping voltage at 12.44 A (10/1000 μs) ensures protected ICs experience minimal overvoltage during transients.
The SMF (DO-219AB) package delivers 20 K/W thermal resistance to leads and supports wave/reflow soldering per J-STD-020 MSL level 1. With 558 pF capacitance at 0 V and ±30 kV ESD rating, it balances low clamping, fast response, and signal integrity for high-speed interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; sustains repeated surges without degradation) |
| Stand-off Voltage (VRWM) | 18.7 V max (maximum continuous reverse voltage before conduction begins) |
| Breakdown Voltage (VBR) | 20.9–23.2 V at IT = 1 mA (tight ±5 % tolerance ensures predictable turn-on) |
| Clamping Voltage (VC) | 31 V at IPPM = 12.44 A (limits downstream voltage during worst-case surge) |
| ESD Immunity | ±30 kV contact & air discharge (IEC 61000-4-2 compliant for robust system-level ESD hardening) |
| Junction Temperature Range | –55 °C to +175 °C (enables operation in under-hood automotive environments) |
| Capacitance | 558 pF at VR = 0 V, f = 1 MHz (suitable for DC power and low-speed signal line protection) |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package with cathode marking bar; compatible with SOD-123W footprint and reflow/wave soldering processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground; completes clamping path during transient events |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V supply rail); conducts avalanche current to ground |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles high-energy surges (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| ±5 % VBR tolerance | Ensures consistent clamping onset across production lots for reliable design margining |
| Low-profile SMF package | 1.08 mm height enables space-constrained PCB layouts in automotive ECUs and portable electronics |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and infotainment systems |
| Halogen-free & RoHS-compliant | Meets automotive environmental standards and end-of-life recycling requirements |
Applications
| Automotive Infotainment Power Rail | USB Type-C VBUS Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines feeding head unit processors and display drivers from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VBUS and chassis ground to clamp surges before they reach PMICs and SoCs. Use Value: 31 V clamping limits stress on 16 V-rated input capacitors and prevents latch-up in downstream regulators. |
Use Scenario: Safeguarding USB Type-C receptacles against ESD and hot-plug induced voltage spikes during cable insertion. IC Role / Device Role / Timing Role: Standoff-clamp device on VBUS line, activated only during overvoltage events while remaining invisible to normal 5 V operation. Use Value: 558 pF capacitance avoids signal integrity issues on CC and D+/D– lines; ±30 kV ESD rating exceeds USB-IF compliance thresholds. |
| Industrial Sensor Interface Supply | Telematics LTE Module Power Input |
Use Scenario: Shielding 24 V sensor bus power inputs from inductive switching noise and lightning-induced surges in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side power entry, coordinated with upstream fuse and common-mode choke. Use Value: 175 °C max junction temperature supports operation inside sealed enclosures with limited airflow. |
Use Scenario: Protecting LTE modem power input (12 V nominal) from automotive battery transients during ignition and alternator load dump. IC Role / Device Role / Timing Role: First-line transient suppressor before DC-DC converter input, absorbing energy before regulation stage. Use Value: 400 W rating handles ISO 7637-2 Pulse 5a (75 V/100 ms) without derating; DO-219AB package withstands mechanical vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5T | Higher VRWM (18 V), lower PPPM (400 W), same DO-214AC package but larger footprint and 30 K/W RthJL | Limited to non-automotive industrial use due to lack of AEC-Q101 qualification | Select when cost sensitivity outweighs automotive qualification and thermal performance needs |
| TPSMD19A | Same VRWM (18.7 V), tighter VBR tolerance (±3.5 %), higher VC (32.4 V), 500 W rating, DO-214AB package | Better suited for higher-energy surges but requires larger PCB area and lacks halogen-free certification | Choose for enhanced surge margin where board space allows and halogen-free compliance is not mandated |
Compared with SMAJ18A-E3/5T and TPSMD19A, VTVS19ASMF-M3-08 offers superior thermal performance (20 K/W vs. ≥30 K/W), AEC-Q101 qualification for automotive deployment, and halogen-free construction - making it optimal for space-constrained, thermally demanding, and regulated automotive applications.
Availability
VTVS19ASMF-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB Type-C power delivery designs, and industrial sensor interface modules requiring stable component supply and long-term lifecycle support.
Supply support for VTVS19ASMF-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.
VTVS19ASMF-M3-08 belongs to Vishay's eSMP® Series TransZorb® TVS family, engineered specifically for compact, high-power transient suppression in automotive and harsh-environment electronics with strict AEC-Q101 and RoHS compliance.
FAQ
What is the clamping voltage of VTVS19ASMF-M3-08 at its rated peak pulse current?
The VTVS19ASMF-M3-08 has a maximum reverse clamping voltage (VC) of 31 V at 12.44 A peak pulse current (10/1000 μs waveform). This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is VTVS19ASMF-M3-08 qualified for automotive applications?
Yes, VTVS19ASMF-M3-08 is AEC-Q101 qualified, meaning it has passed rigorous stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive electronic components. This qualification confirms its suitability for under-hood and cabin-mounted systems such as telematics modules and infotainment power supplies.
What package type does VTVS19ASMF-M3-08 use, and what are its key mechanical dimensions?
VTVS19ASMF-M3-08 uses the SMF (DO-219AB) package: length 3.9 mm, width 1.9 mm, height 1.08 mm max, with cathode marked by a bar. Its footprint matches SOD-123W and supports reflow soldering up to 260 °C peak temperature. The low profile enables dense PCB layouts in space-constrained automotive modules.
How does the ±5 % VBR tolerance of VTVS19ASMF-M3-08 impact circuit protection design?
The ±5 % reverse breakdown voltage tolerance of VTVS19ASMF-M3-08 ensures predictable turn-on behavior across manufacturing lots, allowing designers to set safe margins between VRWM (18.7 V) and VBR (20.9–23.2 V). This consistency simplifies validation of protection schemes for ISO 7637-2 and IEC 61000-4-5 compliance without over-engineering voltage headroom.
Can VTVS19ASMF-M3-08 be used for bidirectional transient suppression?
No, VTVS19ASMF-M3-08 is a unidirectional TVS diode - it conducts only during reverse-biased overvoltage events and blocks forward current like a standard diode. For bidirectional protection (e.g., AC lines or differential data buses), a dedicated bidirectional variant such as VTVS19BSMF-M3-08 would be required; using this part in bidirectional configurations risks permanent forward conduction and failure.
VTVS19ASMF-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):
- 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-M3-08 FAQ
1.How can I place an order for VTVS19ASMF-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS19ASMF-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 VTVS19ASMF-M3-08 reliable?
The price and inventory of VTVS19ASMF-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 VTVS19ASMF-M3-08 is usually 5 days.
3.What payment methods are accepted for VTVS19ASMF-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS19ASMF-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS19ASMF-M3-08?
VTVS19ASMF-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS19ASMF-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 VTVS19ASMF-M3-08?
For technical support, including VTVS19ASMF-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS19ASMF-M3-08 requirements.
6.How does Aetrix verify that VTVS19ASMF-M3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS19ASMF-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 VTVS19ASMF-M3-08 meets industry standards.
7.What is the process for return or replacement of VTVS19ASMF-M3-08?
All VTVS19ASMF-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS19ASMF-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 VTVS19ASMF-M3-08 part is unused and in its original packaging.
Return procedure for VTVS19ASMF-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS19ASMF-M3-08 Tags
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