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Vishay General Semiconductor - Diodes Division VTVS9V4ASMF-HM3-18
- Part No.:
- VTVS9V4ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS9V4ASMF-HM3-18.pdf
- Description:
- TVS DIODE 9.4VWM 14.9VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,036
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Product details
Overview
VTVS9V4ASMF-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 of low-voltage DC lines. It features a 9.4 V maximum stand-off voltage (VRWM), 10.5–11.6 V reverse breakdown voltage (VBR) at 1 mA, and clamps to ≤14.9 V at 25.48 A peak pulse current (10/1000 μs), making it suitable for USB 2.0 data line and automotive infotainment power rail protection.
For engineers reviewing the VTVS9V4ASMF-HM3-18 datasheet, VTVS9V4ASMF-HM3-18 pinout, VTVS9V4ASMF-HM3-18 application, or VTVS9V4ASMF-HM3-18 equivalent, key selection criteria include its ±5 % VBR tolerance, 1130 pF typical junction capacitance at 0 V, 175 °C max junction temperature, halogen-free construction, and AEC-Q101 qualification readiness (via HM3 suffix).
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range. Its low-clamping behavior (VC ≤14.9 V at IPPM = 25.48 A) ensures robust protection of downstream ICs with 12 V-rated I/Os, while its fast response time enables effective suppression of ESD transients per IEC 61000-4-2 (±30 kV contact/air discharge).
The SMF (DO-219AB) package delivers high thermal performance (RthJL = 20 K/W) and supports wave/reflow soldering. The HM3 suffix denotes halogen-free, lead-free, RoHS-compliant terminations on 7" tape-and-reel (3K/reel), with MSL level 1 moisture sensitivity rating and JESD201 class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform); sustains high-energy surges without failure in automotive load-dump or industrial switching events |
| Stand-off Voltage (VRWM) | 9.4 V max; blocks normal 9 V system operation while remaining fully inactive below breakdown threshold |
| Breakdown Voltage (VBR) | 10.5–11.6 V at IT = 1 mA; tight ±5 % tolerance ensures predictable turn-on across production lots |
| Clamping Voltage (VC) | ≤14.9 V at IPPM = 25.48 A; limits transient voltage seen by protected IC to safe margin below 16 V absolute max ratings |
| Junction Capacitance | 1130 pF at VR = 0 V, f = 1 MHz; compatible with low-speed interfaces (e.g., CAN, LIN, sensor buses) but not high-speed USB 3.0 or HDMI |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2); meets Level 4 immunity for front-panel buttons, connectors, and exposed ports |
| Operating Temperature | −55 °C to +175 °C; validated for under-hood automotive, industrial motor control, and outdoor power supply applications |
Pinout & Package
Package: SMF (DO-219AB) - low-profile surface-mount package with cathode marking bar; dimensions 3.9 × 1.9 × 1.08 mm; compatible with SOD-123W footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-impedance return path; forms current loop during clamping |
| Cathode | Protected line input | Connected to line being protected (e.g., VBUS, signal line); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems without derating |
| "Low-Noise" fast response | Sub-nanosecond turn-on ensures clamping before sensitive logic or analog circuitry experiences overvoltage stress |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing requirements |
| AEC-Q101 qualified option | HM3 suffix indicates qualification-ready construction; full AEC-Q101 testing available per customer request |
| Wave/reflow solderable | Rated for peak reflow temperatures up to 260 °C; compatible with standard Pb-free assembly processes |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 9 V supply lines feeding LCD displays, touch controllers, and audio amplifiers in vehicle head units. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VCC and GND, operating in reverse-bias standby mode until surge event. Use Value: Clamps transients to ≤14.9 V, preserving 16 V-rated PMICs and microcontrollers without requiring additional series impedance or filtering. |
Use Scenario: Safeguarding 4–20 mA current-loop sensor inputs and RS-485 transceivers in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff protector on power and signal lines; absorbs induced lightning surges and relay-switching spikes. Use Value: Withstands 400 W pulses and −55 °C to +175 °C operation, enabling reliable field deployment in uncontrolled ambient environments. |
| USB 2.0 VBUS Line Protection | DC-DC Converter Input Stage |
|
Use Scenario: Secondary overvoltage clamp on USB 2.0 host port VBUS line after primary fuse and upstream filter. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates within nanoseconds to divert surge energy away from USB controller IC. Use Value: 1130 pF capacitance avoids signal integrity degradation on 480 Mbps data lines while providing ±30 kV ESD immunity. |
Use Scenario: Input-side transient suppression for 12 V input buck converters powering FPGA or DSP subsystems. IC Role / Device Role / Timing Role: Primary surge limiter placed directly at converter input terminals, ahead of bulk capacitor and EMI filter. Use Value: 25.48 A peak pulse current rating handles ISO 16750-2 load-dump events without degradation, extending converter lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A-E3/5A (Vishay) | Same SMF package, but 9.0 V VRWM, 10.0–11.1 V VBR, 27.8 A IPPM, 15.0 V VC; ±5 % tolerance | Slightly lower clamping (15.0 V vs. 14.9 V) and higher IPPM; identical footprint but different breakdown distribution | Select when tighter VRWM margin is needed near 9.0 V nominal rails; verify layout compatibility with same DO-219AB outline |
| TPSMF9.0A (STMicroelectronics) | 9.0 V VRWM, 10.0–11.1 V VBR, 400 W, 15.0 V VC at 27.8 A; SOD-123FL package (same pinout, 0.1 mm taller) | Identical electrical specs but slightly taller package (1.18 mm vs. 1.08 mm); requires minor PCB land pattern adjustment | Choose for dual-sourcing flexibility; confirm mechanical clearance in ultra-low-profile assemblies before substitution |
Compared with VTVS9V4ASMF-HM3-18, SMAJ9.0A-E3/5A offers marginally higher surge current handling but identical clamping, while TPSMF9.0A provides equivalent protection in a functionally interchangeable package with minor height variation-both require validation of board-level mechanical fit and thermal coupling.
Availability
VTVS9V4ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor interface, USB 2.0 VBUS, and DC-DC converter input applications requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for VTVS9V4ASMF-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 TransZorb® eSMP® Series-including VTVS9V4ASMF-HM3-18-is engineered for high-power transient suppression in space-constrained, thermally demanding environments such as automotive ECUs and industrial power supplies.
FAQ
What is the maximum clamping voltage of the VTVS9V4ASMF-HM3-18 under peak pulse conditions?
The VTVS9V4ASMF-HM3-18 exhibits a maximum reverse clamping voltage (VC) of 14.9 V when subjected to its rated 25.48 A peak pulse current (10/1000 μs waveform). This value is measured at the device terminals under standardized test conditions and ensures downstream 12 V–16 V rated ICs remain within safe operating limits during surge events.
Is the VTVS9V4ASMF-HM3-18 qualified to AEC-Q101?
The VTVS9V4ASMF-HM3-18 is built using AEC-Q101-qualified materials and processes; the HM3 suffix confirms halogen-free, lead-free, RoHS-compliant construction with JESD201 class 2 whisker resistance and MSL level 1 rating. Full AEC-Q101 test reports are available upon request for automotive program validation.
What does the "HM3-18" suffix indicate in VTVS9V4ASMF-HM3-18?
In VTVS9V4ASMF-HM3-18, "HM3" denotes halogen-free, lead-free, RoHS-compliant terminations on 7" tape-and-reel packaging (3000 pcs/reel), while "-18" specifies the date code format (YYWW). The base "SMF" identifies the DO-219AB package, and "A" indicates ±5 % VBR tolerance-distinct from "G" (±2 %) variants.
Can the VTVS9V4ASMF-HM3-18 be used in bidirectional signal lines?
No-the VTVS9V4ASMF-HM3-18 is a unidirectional TVS diode, intended only for DC power rail or single-polarity signal line protection. For bidirectional applications like RS-485 or USB D+/D−, a dedicated bidirectional variant (e.g., VTVS9V4BSMF-HM3-18) or dual-diode configuration is required; using this part on AC-coupled lines risks forward conduction and failure.
What is the thermal resistance (RthJL) of the VTVS9V4ASMF-HM3-18, and how does it impact layout design?
The VTVS9V4ASMF-HM3-18 has a thermal resistance RthJL of 20 K/W (junction-to-lead, mounted on infinite heat sink). This value guides PCB copper pour sizing: for continuous 1 W dissipation, ≥25 mm² of 2 oz copper connected to both leads reduces temperature rise to <20 °C. Layout must avoid thermal isolation and ensure symmetric pad thermal mass.
VTVS9V4ASMF-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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 14.9V
- Current - Peak Pulse (10/1000µs):
- 25.48A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 1130pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS9V4ASMF-HM3-18 FAQ
1.How can I place an order for VTVS9V4ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS9V4ASMF-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 VTVS9V4ASMF-HM3-18 reliable?
The price and inventory of VTVS9V4ASMF-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 VTVS9V4ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS9V4ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS9V4ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS9V4ASMF-HM3-18?
VTVS9V4ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS9V4ASMF-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 VTVS9V4ASMF-HM3-18?
For technical support, including VTVS9V4ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS9V4ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS9V4ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS9V4ASMF-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 VTVS9V4ASMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS9V4ASMF-HM3-18?
All VTVS9V4ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS9V4ASMF-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 VTVS9V4ASMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS9V4ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS9V4ASMF-HM3-18 Tags
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