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Vishay General Semiconductor - Diodes Division VTVS12ASMF-HM3-08
- Part No.:
- VTVS12ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS12ASMF-HM3-08.pdf
- Description:
- TVS DIODE 12.4VWM 20.1VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,871
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Product details
Overview
VTVS12ASMF-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 DC power rails and low-speed signal lines. It features a 12.4 V stand-off voltage (VRWM), 14.0–15.4 V reverse breakdown voltage (VBR) at 1 mA, 20.1 V maximum clamping voltage (VC) at 19.01 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the VTVS12ASMF-HM3-08 datasheet, VTVS12ASMF-HM3-08 pinout, VTVS12ASMF-HM3-08 application, or VTVS12ASMF-HM3-08 equivalent, this device delivers verified clamping performance, halogen-free construction, AEC-Q101 qualification readiness, and compatibility with SOD-123W footprint - critical for automotive infotainment power rail protection, industrial sensor interface hardening, and USB-C port ESD resilience.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 12.4 V working threshold. Its 20.1 V clamping voltage at 19.01 A (10/1000 μs) ensures downstream ICs remain below safe absolute maximum ratings during transient events.
The SMF package enables surface-mount reflow compatibility with peak temperature ≤260 °C, MSL Level 1 handling, and thermal resistance of 20 K/W to leads. With 807 pF typical junction capacitance at 0 V and -55 °C to +175 °C operating range, it supports high-reliability automotive and industrial environments.
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) | 12.4 V (maximum continuous reverse voltage before leakage exceeds 0.05 μA) |
| Breakdown Voltage (VBR) | 14.0–15.4 V at 1 mA (tight ±5 % tolerance ensures predictable turn-on across production lots) |
| Clamping Voltage (VC) | 20.1 V at 19.01 A IPPM (limits voltage seen by protected circuit during worst-case surge) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2; eliminates need for secondary ESD stages) |
| Junction Temperature Range | -55 °C to +175 °C (supports under-hood automotive and industrial control cabinet deployment) |
| Capacitance (CD) | 807 pF at 0 V, 1 MHz (compatible with <1 Mbps data lines and DC power inputs) |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, halogen-free molding compound, UL 94 V-0 rated, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-impedance return path; defines unidirectional conduction direction |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V rail); conducts avalanche current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W Peak Pulse Power | Handles IEC 61000-4-5 Level 4 surges (2 Ω source impedance) on 12 V systems without failure |
| ±5 % VBR Tolerance | Ensures consistent clamping onset across batches - critical for margin-critical 12 V automotive subsystems |
| Low-Noise Fast Response | Sub-nanosecond response time prevents ESD-induced latch-up in adjacent CMOS logic |
| AEC-Q101 Qualified Option | VTVS12ASMF-HM3-08 variant supports automotive qualification path with traceable lot-level test data |
| SOD-123W Footprint Compatibility | Enables drop-in replacement in existing layouts using standard SOD-123W land pattern and stencil design |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: 12 V battery-supplied BCM microcontroller power rail exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input fuse and LDO regulator input. Use Value: Limits voltage to ≤20.1 V during 19 A surge, preventing LDO overvoltage shutdown and MCU brownout. |
Use Scenario: 4–20 mA current loop analog input channel subject to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Primary protection device shunting transients from op-amp input to ground. Use Value: 807 pF capacitance avoids signal distortion at ≤10 kHz bandwidth; ±30 kV ESD rating eliminates external spark gaps. |
| USB-C Port VBUS Line Protection | Smart Meter Battery Backup Circuit |
|
Use Scenario: VBUS line (5–20 V) in USB-C receptacle subjected to hot-plug ESD and cable coupling noise. IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly at connector, upstream of buck converter. Use Value: 12.4 V VRWM allows full USB PD 20 V operation while clamping 10/1000 μs surges to 20.1 V. |
Use Scenario: Lithium coin-cell backup supply (3 V) for RTC and SRAM in energy meter, exposed to metering port surges. IC Role / Device Role / Timing Role: Low-leakage TVS (0.05 μA max IR) guarding backup rail against ESD during field servicing. Use Value: Ultra-low reverse current preserves battery life; 175 °C TJ max supports sealed meter housing temperatures. |
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 | Same 12 V VRWM, but 400 W rating uses 8.3 ms pulse; lower clamping (19.9 V) but higher capacitance (1000 pF) | Less suitable for high-frequency analog lines due to higher CD; better for pure power rail use | Select SMAJ12A only if layout allows larger SMA package and analog bandwidth <100 kHz |
| TPSMD12A | 12 V VRWM, 400 W, 20.5 V VC at 19.5 A; RoHS-compliant but not halogen-free; MSL Level 1 same | Compatible for industrial non-automotive use; lacks AEC-Q101 path and halogen-free certification | Choose TPSMD12A for cost-sensitive non-automotive designs where halogen-free compliance is not mandated |
Compared with VTVS12ASMF-HM3-08, SMAJ12A offers slightly tighter clamping but sacrifices analog signal integrity via higher capacitance, while TPSMD12A trades halogen-free status and automotive qualification for broader distributor availability - making VTVS12ASMF-HM3-08 the optimal choice for AEC-Q101-aligned, high-reliability 12 V rail protection.
Availability
VTVS12ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and USB-C power delivery systems requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for VTVS12ASMF-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 VTVS12ASMF-HM3-08 - was engineered for compact, high-power transient suppression in space-constrained automotive and industrial PCBs, with emphasis on AEC-Q101 readiness and robust surge handling.
FAQ
What is the maximum clamping voltage of the VTVS12ASMF-HM3-08 under a 10/1000 μs surge?
The VTVS12ASMF-HM3-08 has a maximum reverse clamping voltage (VC) of 20.1 V at 19.01 A peak pulse current with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet Rev. 2.2 and defines the upper voltage limit imposed on protected circuits during standardized surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the VTVS12ASMF-HM3-08 qualified to AEC-Q101?
The VTVS12ASMF-HM3-08 is offered in an AEC-Q101 qualified version (denoted by "H" in the ordering code). While the base part meets all electrical and environmental requirements, full AEC-Q101 qualification requires specific lot-level testing and documentation - available upon request for automotive program engagements. The "H" suffix confirms eligibility for that qualification path.
What does the "HM3-08" suffix in VTVS12ASMF-HM3-08 indicate?
In VTVS12ASMF-HM3-08, "H" denotes AEC-Q101 qualification readiness, "M" indicates halogen-free material compliance, "3" specifies lead (Pb)-free tin plating, and "-08" means 3,000 units per 7-inch reel (8 mm tape, MOQ = 30,000). This full suffix defines environmental compliance, packaging, and automotive suitability - essential for procurement and PCN tracking.
Can VTVS12ASMF-HM3-08 be used in bidirectional protection configurations?
No - VTVS12ASMF-HM3-08 is a unidirectional TVS diode, optimized for DC power rail and single-polarity signal line protection. For bidirectional applications (e.g., AC lines or differential buses), a dedicated bidirectional part such as VTVS12B or paired unidirectional devices would be required. Using VTVS12ASMF-HM3-08 in reverse-biased AC contexts risks premature conduction or failure.
What is the thermal resistance and maximum junction temperature for VTVS12ASMF-HM3-08?
VTVS12ASMF-HM3-08 has a thermal resistance (RthJL) of 20 K/W when mounted on an infinite heat sink, and a maximum junction temperature (TJ) of +175 °C. This enables reliable operation in under-hood automotive environments and sealed industrial enclosures, provided board-level copper area and solder joint integrity meet Vishay's recommended footprint guidelines for the SMF (DO-219AB) package.
VTVS12ASMF-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):
- 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:
- -
- Capacitance @ Frequency:
- 807pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS12ASMF-HM3-08 FAQ
1.How can I place an order for VTVS12ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS12ASMF-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 VTVS12ASMF-HM3-08 reliable?
The price and inventory of VTVS12ASMF-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 VTVS12ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS12ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS12ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS12ASMF-HM3-08?
VTVS12ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS12ASMF-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 VTVS12ASMF-HM3-08?
For technical support, including VTVS12ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS12ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS12ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS12ASMF-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 VTVS12ASMF-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS12ASMF-HM3-08?
All VTVS12ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS12ASMF-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 VTVS12ASMF-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS12ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS12ASMF-HM3-08 Tags
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