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Vishay General Semiconductor - Diodes Division VTVS12ASMF-HM3-18
- Part No.:
- VTVS12ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS12ASMF-HM3-18.pdf
- Description:
- TVS DIODE 12.4VWM 20.1VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,195
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Product details
Overview
VTVS12ASMF-HM3-18 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, designed for ESD and surge protection on DC power rails and signal lines. It features a 12.4 V maximum stand-off voltage (VRWM), 14.0–15.4 V reverse breakdown voltage (VBR) at 1 mA, 20.1 V clamping voltage (VC) at 19.01 A peak pulse current (IPPM), and ±30 kV IEC 61000-4-2 ESD immunity - used in automotive infotainment power inputs and industrial sensor interfaces.
For engineers reviewing the VTVS12ASMF-HM3-18 datasheet, VTVS12ASMF-HM3-18 pinout, VTVS12ASMF-HM3-18 application, or VTVS12ASMF-HM3-18 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low leakage (<0.05 μA at VRWM), halogen-free construction, AEC-Q101 qualification status, and compatibility with SOD-123W footprint constraints.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its breakdown threshold (VBR = 14.0–15.4 V), diverting transient energy to ground while clamping the protected line to ≤20.1 V at 19.01 A. Its low 807 pF junction capacitance enables use on moderate-speed data lines without signal integrity degradation.
Thermal resistance is rated at 20 K/W (junction-to-lead, infinite heat sink), supporting continuous operation up to +175 °C junction temperature. The SMF package meets MSL Level 1 per J-STD-020 and is compatible with wave and reflow soldering at peak temperatures ≤260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; defines maximum transient energy absorption capability) |
| Stand-off Voltage (VRWM) | 12.4 V (maximum continuous reverse voltage before significant leakage; sets operating margin) |
| Breakdown Voltage (VBR) | 14.0–15.4 V at IT = 1 mA (avalanche initiation range; determines turn-on threshold) |
| Clamping Voltage (VC) | 20.1 V at IPPM = 19.01 A (voltage seen by protected circuit during worst-case surge) |
| ESD Immunity | ±30 kV contact & air discharge (IEC 61000-4-2; qualifies for harsh ESD environments) |
| Junction Temperature Range | −55 °C to +175 °C (supports under-hood automotive and industrial ambient conditions) |
| Capacitance (CD) | 807 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 or CAN FD bus protection) |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, halogen-free molding compound, cathode marked by bar on top surface. Compatible with SOD-123W, SOD-123F, and SOD-123FL footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; tied to protected line | Connected to signal or power rail requiring transient suppression |
| Cathode | Current exit point during reverse avalanche; tied to ground or return path | Must be routed to low-impedance ground plane to ensure effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| "Low-Noise" fast response | Sub-nanosecond turn-on ensures clamping before sensitive ICs are damaged |
| AEC-Q101 qualified option | Available in HM3 variant (VTVS12ASMF-HM3-18) for automotive-grade reliability |
| Halogen-free & RoHS-compliant | Meets automotive and industrial environmental compliance requirements (JESD201 class 2) |
| Wave/reflow solderable | Rated for peak reflow temperature of 260 °C (MSL Level 1, no baking required) |
| Low leakage current | ≤0.05 μA at VRWM = 12.4 V minimizes standby power loss in battery-powered systems |
Applications
| Automotive Infotainment Power Input | Industrial Sensor Signal Line |
|---|---|
Use Scenario: Protecting 12 V supply rail of head unit MCU from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VIN and GND, clamping surges above 20.1 V. Use Value: Prevents overvoltage damage to LDO regulators and microcontrollers without adding series impedance. |
Use Scenario: Shielding 4–20 mA analog output of pressure sensor from ESD events in factory floor environments. IC Role / Device Role / Timing Role: Standoff-rated protection element on current-loop output line, grounded at receiver end. Use Value: Maintains signal fidelity (807 pF) while surviving repeated ±30 kV contact discharges. |
| USB Type-C VBUS Line | Automotive LIN Bus Node |
Use Scenario: Secondary overvoltage protection on VBUS line downstream of primary buck converter. IC Role / Device Role / Timing Role: Fast-clamping TVS in parallel with VBUS, activated only during >14 V transients. Use Value: Limits VBUS overshoot to ≤20.1 V during hot-plug or adapter fault conditions. |
Use Scenario: ESD protection at LIN transceiver input/output pins in body control modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode to LIN, anode to GND) meeting ISO 10605. Use Value: Provides ±30 kV ESD robustness without distorting LIN's 19.2 kbps signaling waveform. |
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 VRWM (12 V), but lower PPPM (400 W same), higher VC (20.9 V), larger SMA package (DO-214AC) | Less suitable for space-constrained PCBs; not AEC-Q101 qualified in standard grade | Select if footprint flexibility exists and automotive qualification is not required |
| SMF12A | Identical SMF package and VRWM, but non-AEC-Q101; ±5 % VBR tolerance vs. VTVS12ASMF-HM3-18's ±5 % | No halogen-free or automotive-grade assurance; lower traceability in production | Choose for cost-sensitive industrial designs where AEC-Q101 and halogen-free are not mandated |
Compared with SMAJ12A and SMF12A, VTVS12ASMF-HM3-18 delivers verified AEC-Q101 qualification, halogen-free compliance, and tighter thermal resistance (20 K/W) - critical for high-reliability automotive power rail protection where board space and long-term stability are constrained.
Availability
VTVS12ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, USB Type-C power delivery, and LIN bus nodes requiring stable component supply across extended product lifecycles.
Supply support for VTVS12ASMF-HM3-18 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 compact, high-power transient suppression in automotive and industrial applications - engineered for low clamping, fast response, and AEC-Q101 compliance in ultra-small SMF packages.
FAQ
What is the clamping voltage of VTVS12ASMF-HM3-18 at its rated peak pulse current?
The VTVS12ASMF-HM3-18 has a maximum reverse clamping voltage (VC) of 20.1 V at its rated peak pulse current (IPPM) of 19.01 A under a 10/1000 μs waveform. This value ensures protected circuits remain below critical overvoltage thresholds during surge events. The VTVS12ASMF-HM3-18 achieves this clamping performance while maintaining low leakage and high temperature resilience up to +175 °C.
Is VTVS12ASMF-HM3-18 qualified for automotive applications?
Yes, the "H" in VTVS12ASMF-HM3-18 denotes AEC-Q101 qualification, confirming its suitability for automotive applications including engine control units, body electronics, and infotainment systems. The VTVS12ASMF-HM3-18 also meets halogen-free and RoHS requirements, and is rated for operation from −55 °C to +175 °C junction temperature - fulfilling stringent automotive reliability standards.
What package does VTVS12ASMF-HM3-18 use, and is it compatible with standard footprints?
VTVS12ASMF-HM3-18 uses the SMF (DO-219AB) package - a low-profile, halogen-free surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm. It is mechanically and thermally compatible with SOD-123W, SOD-123F, and SOD-123FL footprints, enabling drop-in replacement in existing layouts. The VTVS12ASMF-HM3-18 cathode is marked by a bar on the top surface for orientation verification.
How does the ±5 % VBR tolerance of VTVS12ASMF-HM3-18 affect circuit design?
The ±5 % breakdown voltage tolerance (VBR = 14.0–15.4 V) means the actual avalanche onset will occur within that range at 1 mA test current. Designers must ensure system-level overvoltage margins accommodate this spread - for example, verifying that the protected IC's absolute maximum rating exceeds 15.4 V. The VTVS12ASMF-HM3-18's 12.4 V VRWM provides a 2.0–3.0 V guard band, which remains consistent across all units in the VTVS12ASMF-HM3-18 production lot.
What is the ESD rating of VTVS12ASMF-HM3-18, and how is it tested?
VTVS12ASMF-HM3-18 is rated for ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2 (10 pulses). Testing follows standardized electrode geometry, discharge rate, and coupling method defined in the specification. This level of ESD immunity makes the VTVS12ASMF-HM3-18 appropriate for exposed connectors and user-accessible ports in automotive and industrial equipment where electrostatic events are frequent and severe.
VTVS12ASMF-HM3-18 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:
- -
- 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-HM3-18 FAQ
1.How can I place an order for VTVS12ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS12ASMF-HM3-18 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-HM3-18 reliable?
The price and inventory of VTVS12ASMF-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS12ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS12ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS12ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS12ASMF-HM3-18?
VTVS12ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS12ASMF-HM3-18 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-HM3-18?
For technical support, including VTVS12ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS12ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS12ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS12ASMF-HM3-18 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-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS12ASMF-HM3-18?
All VTVS12ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS12ASMF-HM3-18, 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-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS12ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS12ASMF-HM3-18 Tags
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