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Vishay General Semiconductor - Diodes Division VTVS19ASMF-HM3-08
- Part No.:
- VTVS19ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS19ASMF-HM3-08.pdf
- Description:
- TVS DIODE 18.7VWM 31VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:40,976
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Product details
Overview
VTVS19ASMF-HM3-08 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, designed for ESD and surge protection on low-voltage DC lines such as USB, HDMI, and automotive sensor interfaces. It features 18.7 V stand-off voltage, 20.9–23.2 V reverse breakdown at 1 mA, 31 V clamping voltage at 12.44 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the VTVS19ASMF-HM3-08 datasheet, VTVS19ASMF-HM3-08 pinout, VTVS19ASMF-HM3-08 application, or VTVS19ASMF-HM3-08 equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for high-reliability automotive and industrial interface protection where fast clamping (<1 ns response), low capacitance (558 pF), and robust 400 W 10/1000 μs surge handling are required.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its 18.7 V working voltage, clamping transients to ≤31 V at 12.44 A (10/1000 μs). Its low thermal resistance (20 K/W junction-to-lead) enables reliable power dissipation under repeated surges.
The SMF package supports wave and reflow soldering per J-STD-020 MSL level 1, with peak temperature up to 260 °C. Its 558 pF capacitance at 0 V bias and ±5 % VBR tolerance ensure predictable signal integrity in high-speed data lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 18.7 V - Maximum continuous reverse voltage before conduction begins; sets operating margin for 18–20 V supply rails. |
| Breakdown Voltage (VBR) | 20.9–23.2 V at 1 mA - Tight ±5 % tolerance ensures consistent turn-on across production lots. |
| Clamping Voltage (VC) | 31 V at 12.44 A (10/1000 μs) - Limits downstream IC voltage stress during surge events. |
| Peak Pulse Power (PPPM) | 400 W - Sustains standardized 10/1000 μs surge waveforms without failure. |
| Capacitance (CD) | 558 pF at 0 V, 1 MHz - Low enough for USB 2.0 and CAN FD signal integrity; higher than ultra-low-C variants but optimized for power-handling trade-off. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Meets automotive and industrial ESD immunity requirements without external shielding. |
| Operating Temperature | −55 °C to +175 °C - Supports under-hood automotive and industrial environments with no derating needed. |
Pinout & Package
SMF (DO-219AB) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, halogen-free molding compound, UL 94 V-0 rated, MSL level 1, compatible with SOD-123W footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction; tied to protected line ground or low-side reference | Enables unidirectional clamping from protected line to ground; requires correct PCB polarity alignment. |
| Cathode | Current exit during reverse-biased avalanche clamping; connected to protected signal line | Acts as the high-side terminal for transient shunting; marked with cathode bar on top surface. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Handles automotive load-dump and ISO 7637-2 pulse 1/2a/3a surges without degradation. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary ESD protection stages in USB, LIN, and sensor interfaces. |
| Low-profile SMF (DO-219AB) package | Reduces board area vs. SMA/SMB; compatible with automated SMT placement and reflow profiles. |
| Halogen-free & RoHS-compliant | Meets EU ELV and automotive OEM material compliance requirements without performance compromise. |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors. |
Applications
| Automotive Sensor Interface | USB 2.0 Port Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp ESD and coupled transients. Use Value: Prevents latch-up or damage to 12-bit ADC inputs while maintaining <1 % gain error due to 558 pF loading on 100 kΩ source impedance. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 ports in infotainment head units and telematics gateways. IC Role / Device Role / Timing Role: Bidirectional protection not required; single VTVS19ASMF-HM3-08 per line provides asymmetric clamping aligned with USB signal swing. Use Value: Clamps 31 V max during 12.44 A surge, preserving eye diagram integrity and meeting USB-IF ESD test requirements. |
| Industrial CAN FD Node | Power Supply Input Rail Clamp |
Use Scenario: Secondary surge suppression on CAN_H/CAN_L lines downstream of primary common-mode choke in factory automation nodes. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to local ground, absorbing differential-mode surges exceeding choke attenuation. Use Value: 400 W rating sustains multiple ISO 11898-2 pulse 3b events; 175 °C junction rating supports operation near hot power converters. |
Use Scenario: Input-stage overvoltage protection for 24 V industrial PLC I/O modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Stand-off voltage (18.7 V) allows normal 24 V ±10 % operation while clamping >30 V spikes to safe levels. Use Value: 31 V clamping voltage protects downstream DC-DC controllers rated for 36 V absolute max input. |
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-E3/57T | Same 18 V VRWM, but 400 W PPPM in larger SMA package (DO-214AC); 33.2 V VC at 12.3 A; ±5 % VBR. | Higher mounting height (2.3 mm vs. 1.08 mm) limits use in ultra-thin modules; same thermal RthJL (20 K/W). | Select when legacy SMA footprint exists or higher mechanical robustness is prioritized over board space. |
| 1.5SMC18A | 18 V VRWM, 1500 W PPPM in larger SMC (DO-214AB); 29.2 V VC at 51.4 A; ±5 % VBR; 1000 pF CD. | Higher capacitance degrades USB 2.0 signal integrity; suited for power rail, not data line, protection. | Choose only for bulk 24 V rail clamping where speed and capacitance are secondary to energy absorption. |
Compared with SMAJ18A-E3/57T and 1.5SMC18A, VTVS19ASMF-HM3-08 delivers identical surge rating in a 55 % smaller footprint and 558 pF capacitance-critical for high-speed interfaces-while maintaining AEC-Q101 qualification and halogen-free compliance.
Availability
VTVS19ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive sensor protection, USB 2.0 interface hardening, industrial CAN FD node design, and 24 V power rail clamping requiring stable component supply and long-term lifecycle support.
Supply support for VTVS19ASMF-HM3-08 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® eSMP® Series-including VTVS19ASMF-HM3-08-is engineered for compact, high-power transient suppression in space-constrained automotive and industrial electronics, balancing clamping performance, thermal robustness, and manufacturability.
FAQ
What is the maximum clamping voltage of the VTVS19ASMF-HM3-08 under standard surge conditions?
The VTVS19ASMF-HM3-08 clamps to a maximum of 31 V when subjected to a 10/1000 μs waveform with a peak pulse current of 12.44 A. This value is measured per IEC 61000-4-5 and ensures downstream circuitry remains within safe voltage limits during surge events. The clamping performance is guaranteed across the full operating temperature range of −55 °C to +175 °C.
Is the VTVS19ASMF-HM3-08 suitable for protecting USB 2.0 data lines?
Yes, the VTVS19ASMF-HM3-08 is appropriate for USB 2.0 D+ and D− line protection due to its 558 pF capacitance at 0 V, which introduces minimal signal distortion at 480 Mbps, and its 31 V clamping voltage that preserves receiver input thresholds. Its unidirectional configuration aligns with USB's asymmetric voltage swing, and its ±30 kV ESD rating exceeds USB-IF compliance requirements.
Does the VTVS19ASMF-HM3-08 meet automotive qualification standards?
Yes, the VTVS19ASMF-HM3-08 is AEC-Q101 qualified, confirming its reliability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. It operates from −55 °C to +175 °C, withstands 400 W surges, and complies with IEC 61000-4-2 ESD testing-key requirements for under-hood and cabin-mounted systems.
What is the package type and soldering compatibility of the VTVS19ASMF-HM3-08?
The VTVS19ASMF-HM3-08 uses the SMF (DO-219AB) package: 3.9 mm × 1.9 mm × 1.08 mm, halogen-free, UL 94 V-0 rated, and MSL level 1 per J-STD-020. It supports both wave and reflow soldering with peak temperatures up to 260 °C, making it compatible with standard SMT assembly processes without special handling or baking.
How does the VTVS19ASMF-HM3-08 differ from the VTVS19GSMF-HM3-08 variant?
The VTVS19ASMF-HM3-08 has ±5 % tolerance on its 20.9–23.2 V breakdown voltage, whereas the VTVS19GSMF-HM3-08 offers tighter ±2 % tolerance (21.61–22.50 V). Both share identical package, clamping voltage (31 V), capacitance (558 pF), and surge rating (400 W), but the 'G' variant is preferred where precise voltage threshold consistency is critical-such as in multi-sensor calibration systems.
VTVS19ASMF-HM3-08 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:
- -
- Capacitance @ Frequency:
- 558pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS19ASMF-HM3-08 FAQ
1.How can I place an order for VTVS19ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS19ASMF-HM3-08 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-HM3-08 reliable?
The price and inventory of VTVS19ASMF-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS19ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS19ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS19ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS19ASMF-HM3-08?
VTVS19ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS19ASMF-HM3-08 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-HM3-08?
For technical support, including VTVS19ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS19ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS19ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS19ASMF-HM3-08 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-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS19ASMF-HM3-08?
All VTVS19ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS19ASMF-HM3-08, 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-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS19ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS19ASMF-HM3-08 Tags
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