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Vishay General Semiconductor - Diodes Division VTVS28ASMF-HM3-08
- Part No.:
- VTVS28ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS28ASMF-HM3-08.pdf
- Description:
- TVS DIODE 27.9VWM 47VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:24,245
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Product details
Overview
VTVS28ASMF-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 of low-voltage DC lines such as USB, HDMI, and automotive sensor interfaces. It features a 27.9 V maximum stand-off voltage (VRWM), 31.4–34.7 V reverse breakdown voltage (VBR) at 1 mA, and clamps to ≤47 V at 8.21 A peak pulse current (10/1000 μs).
For engineers reviewing the VTVS28ASMF-HM3-08 datasheet, VTVS28ASMF-HM3-08 pinout, VTVS28ASMF-HM3-08 application, or VTVS28ASMF-HM3-08 equivalent, this page delivers verified electrical specs, SMF package dimensions, IEC 61000-4-2 ±30 kV ESD immunity, AEC-Q101 qualification status, and real-world clamping behavior for robust overvoltage design.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 31.4–34.7 V breakdown threshold. Its low 20 K/W thermal resistance (junction-to-lead) enables effective power dissipation during 400 W 10/1000 μs transients, with sub-nanosecond response time ensuring protection before downstream IC damage occurs.
The device complies with IEC 61000-4-2 (±30 kV contact/air discharge) and is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive use. Its 1.08 mm height and SOD-123W-compatible SMF (DO-219AB) footprint supports high-density PCB layouts while maintaining wave and reflow solderability.
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) | 27.9 V (maximum continuous reverse operating voltage before leakage exceeds 0.05 μA) |
| Breakdown Voltage (VBR) | 31.4–34.7 V at IT = 1 mA (tight ±5 % tolerance ensures predictable turn-on across temperature) |
| Clamping Voltage (VC) | ≤47 V at IPPM = 8.21 A (limits protected line voltage to safe level during surge) |
| ESD Immunity | ±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 environments) |
| Capacitance (CD) | 412 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 signal integrity; not suitable for USB 3.x) |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount outline compatible with SOD-123W footprint; cathode marked by bar on top surface; 1.08 mm max height, 3.9 mm length, 1.9 mm width; MSL Level 1, reflow-compatible up to 260 °C peak.
| 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 I/O line (e.g., USB D+); conducts avalanche current when VR > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles automotive load-dump and ISO 7637-2 pulse 1/2a/3a surges without failure |
| ±5 % VBR tolerance | Ensures consistent clamping threshold across production lots and temperature range |
| ±30 kV ESD immunity | Meets full IEC 61000-4-2 compliance without external ESD components |
| AEC-Q101 qualified | Validated for automotive applications including body electronics and infotainment interfaces |
| Halogen-free & RoHS | Complies with environmental regulations for global OEM supply chains |
Applications
| USB 2.0 Data Lines | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of USB 2.0 D+/D− lines against ESD events during hot-plug and handling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and ground to shunt ESD current away from USB transceiver. Use Value: Clamps transients to ≤47 V within nanoseconds, preserving signal integrity and preventing PHY latch-up at 480 Mbps. |
Use Scenario: Surge suppression on LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules. IC Role / Device Role / Timing Role: Standoff-rated protector that remains non-conductive below 27.9 V but clamps fast-rising load-dump spikes. Use Value: Withstands −55 °C to +175 °C operation and passes AEC-Q101 stress tests, enabling direct placement near sensors. |
| Industrial HMI Touch Panels | DC Power Input Protection |
Use Scenario: ESD hardening of capacitive touch controller I/O pins exposed on front-panel overlays. IC Role / Device Role / Timing Role: Low-capacitance (412 pF) TVS limiting voltage overshoot on touch-sense lines during user interaction. Use Value: Prevents false touches and firmware resets caused by ±30 kV contact discharge without degrading touch sensitivity. |
Use Scenario: Secondary overvoltage clamp on 24 V DC input rails feeding PLC I/O modules or motor drivers. IC Role / Device Role / Timing Role: Fast-response backup protector activated after primary fuse or polyfuse opens during sustained overvoltage. Use Value: Delivers 400 W pulse handling to absorb residual energy from inductive kickback or lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Same VRWM (28 V), but higher VC (49.9 V at 7.2 A); SMA package (larger, 2.4 mm height) | Less suitable for ultra-thin designs; lower peak pulse current rating (7.2 A vs. 8.21 A) | Select when legacy SMA footprint compatibility is required and board height >2.4 mm is acceptable. |
| SMF28A | Identical SMF package and VRWM (28 V), but ±10 % VBR tolerance (vs. ±5 %); no AEC-Q101 qualification | Not approved for automotive use; wider VBR spread increases risk of premature conduction or inadequate clamping | Choose only for cost-sensitive industrial applications where AEC-Q101 and tight VBR are non-critical. |
Compared with SMAJ28A and SMF28A, VTVS28ASMF-HM3-08 offers tighter VBR tolerance, higher surge current capability, AEC-Q101 validation, and lower profile-making it optimal for space-constrained, high-reliability automotive and industrial designs requiring guaranteed clamping performance.
Availability
VTVS28ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and USB peripheral protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for VTVS28ASMF-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® TVS family-including VTVS28ASMF-HM3-08-is engineered for robust ESD and surge protection in harsh environments, with emphasis on AEC-Q101 qualification, low-profile packaging, and precise clamping performance.
FAQ
What is the clamping voltage of VTVS28ASMF-HM3-08 at its rated peak pulse current?
The VTVS28ASMF-HM3-08 clamps to a maximum of 47 V at its rated peak pulse current of 8.21 A (10/1000 μs waveform). This value is measured per IEC 61000-4-5 test conditions and ensures downstream circuitry remains within safe operating limits during surge events. The clamping performance is guaranteed across the full −55 °C to +175 °C junction temperature range.
Is VTVS28ASMF-HM3-08 qualified for automotive applications?
Yes, VTVS28ASMF-HM3-08 is AEC-Q101 qualified, meaning it has passed stress tests for high-temperature operating life, temperature cycling, humidity bias, and mechanical shock required for automotive electronic components. This qualification covers the full SMF package variant and applies directly to the VTVS28ASMF-HM3-08 ordering code.
What does the "HM3-08" suffix indicate in VTVS28ASMF-HM3-08?
The "HM3-08" suffix denotes halogen-free (H), RoHS-compliant and lead-free terminations (M), tape-and-reel packaging (3), and 3000 units per 7-inch reel (08). This matches Vishay's standard ordering nomenclature for the eSMP® Series and confirms compliance with environmental standards and automated assembly requirements.
Can VTVS28ASMF-HM3-08 be used for bidirectional signal lines?
No, VTVS28ASMF-HM3-08 is a unidirectional TVS diode and must be used only on circuits referenced to ground with polarity-aware placement (cathode toward protected line). For bidirectional protection-such as RS-485 or AC-coupled interfaces-a symmetric dual-diode configuration or dedicated bidirectional part like VTVS28BSMF-HM3-08 is required.
What is the typical junction capacitance of VTVS28ASMF-HM3-08 and its impact on signal lines?
VTVS28ASMF-HM3-08 has a typical junction capacitance of 412 pF at 0 V bias and 1 MHz. This value makes it suitable for DC and low-speed digital lines (e.g., USB 2.0, LIN, I²C), but unsuitable for high-speed interfaces like USB 3.x or HDMI, where sub-2 pF capacitance is typically required to avoid signal distortion and insertion loss.
VTVS28ASMF-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):
- 27.9V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 47V
- Current - Peak Pulse (10/1000µs):
- 8.21A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 412pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS28ASMF-HM3-08 FAQ
1.How can I place an order for VTVS28ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS28ASMF-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 VTVS28ASMF-HM3-08 reliable?
The price and inventory of VTVS28ASMF-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 VTVS28ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS28ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS28ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS28ASMF-HM3-08?
VTVS28ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS28ASMF-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 VTVS28ASMF-HM3-08?
For technical support, including VTVS28ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS28ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS28ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS28ASMF-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 VTVS28ASMF-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS28ASMF-HM3-08?
All VTVS28ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS28ASMF-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 VTVS28ASMF-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS28ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS28ASMF-HM3-08 Tags
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