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Vishay General Semiconductor - Diodes Division VTVS33ASMF-HM3-08
- Part No.:
- VTVS33ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS33ASMF-HM3-08.pdf
- Description:
- TVS DIODE 33.3VWM 55VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:34,997
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Product details
Overview
VTVS33ASMF-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 33.3 V maximum stand-off voltage (VRWM), 37.1–41.0 V reverse breakdown voltage (VBR) at 1 mA, and clamps to ≤55 V at 6.91 A peak pulse current (10/1000 μs).
For engineers reviewing the VTVS33ASMF-HM3-08 datasheet, VTVS33ASMF-HM3-08 pinout, VTVS33ASMF-HM3-08 application, or VTVS33ASMF-HM3-08 equivalent, key selection criteria include its ±5 % VBR tolerance, 379 pF capacitance at 0 V, IEC 61000-4-2 ±30 kV contact/air discharge rating, and AEC-Q101 qualification option - critical for automotive infotainment and ADAS interface protection.
Technical Context
This TVS diode operates as a unidirectional clamping device, activating above its 33.3 V working voltage to divert transient energy away from sensitive downstream circuitry. Its low-clamping behavior (VC ≤ 55 V at IPPM = 6.91 A) and fast response time enabled by "Low-Noise" technology ensure robust protection against ESD and lightning-induced surges without signal distortion.
The SMF (DO-219AB) package supports wave and reflow soldering, with MSL level 1 moisture sensitivity and halogen-free molding compound compliant to UL 94 V-0. Thermal resistance is 20 K/W (junction-to-lead on infinite heat sink), enabling reliable operation up to TJ = +175 °C in compact automotive and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; sustains high-energy transients without failure) |
| Stand-off Voltage (VRWM) | 33.3 V (maximum continuous reverse voltage before significant leakage) |
| Breakdown Voltage (VBR) | 37.1–41.0 V at IT = 1 mA (±5 % tolerance ensures predictable turn-on threshold) |
| Clamping Voltage (VC) | ≤55 V at IPPM = 6.91 A (limits voltage seen by protected IC to safe levels) |
| Capacitance (CD) | 379 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 and CAN FD signal integrity) |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 (meets automotive and industrial immunity requirements) |
| Operating Temperature | −55 °C to +175 °C (supports under-hood and industrial ambient conditions) |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, cathode marked by bar on top surface. Compatible with SOD-123W footprint and reflow-compatible per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line | Connected to signal or power line requiring transient suppression |
| Cathode | Clamp reference node | Connected to ground or lower-potential rail; defines unidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles high-energy surges (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation |
| ±5 % VBR tolerance | Ensures tight clamping window across production lots for consistent system-level protection |
| Low-profile SMF package | Enables placement near connectors on space-constrained PCBs (e.g., camera modules, ECUs) |
| IEC 61000-4-2 ±30 kV ESD | Eliminates need for external ESD diodes in USB/HDMI ports meeting IEC 61000-4-2 Level 4 |
| AEC-Q101 qualified option | Validated for automotive use including temperature cycling, HTRB, and mechanical shock testing |
Applications
| Automotive Sensor Interface | USB 2.0 Data Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver I/O pins and analog sensor outputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground to shunt ESD and load-dump transients. Use Value: Prevents latch-up or damage to 3.3 V/5 V microcontrollers and analog front-ends during vehicle assembly or field operation. |
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: Low-capacitance TVS suppressing ESD events while preserving signal rise/fall times (< 2 ns propagation delay). Use Value: Maintains USB 2.0 eye diagram integrity and passes USB-IF compliance tests with < 379 pF loading. |
| HDMI Hot-Plug Detection Line | Industrial RS-485 Transceiver Port |
|
Use Scenario: Protecting the HPD (Hot-Plug Detect) pin of HDMI source devices against electrostatic discharge during cable insertion. IC Role / Device Role / Timing Role: Stand-off voltage (33.3 V) exceeds HPD logic-high level (typically 3–5 V), ensuring no leakage or false triggering. Use Value: Guarantees stable hot-plug detection function while surviving repeated ±30 kV contact discharges. |
Use Scenario: Shielding RS-485 transceiver inputs/outputs in factory automation controllers exposed to long cable runs and motor noise. IC Role / Device Role / Timing Role: Clamps induced surges up to 400 W to below 55 V, preventing transceiver latch-up or permanent damage. Use Value: Extends mean time between failures (MTBF) in noisy industrial environments without adding series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VRWM (33 V), but SMA package (DO-214AC); higher RthJA (50 K/W vs. 20 K/W); 400 W rating at 10/1000 μs | Larger footprint (4.5 × 2.7 mm); less suitable for ultra-thin automotive modules | Preferred where board space allows and legacy SMA layout exists |
| TPSMD33A | Same VRWM (33 V), but SMC package (DO-214AB); 600 W rating; 500 pF capacitance | Higher clamping (VC = 53.3 V @ 10.3 A); larger size (7.1 × 6.2 mm); not AEC-Q101 qualified | Used when higher surge margin is required and capacitance is not critical |
Compared with VTVS33ASMF-HM3-08, SMAJ33A-E3/57T offers identical electrical protection but requires more PCB area and has inferior thermal performance, while TPSMD33A delivers higher surge capacity at the cost of size, capacitance, and automotive qualification - making VTVS33ASMF-HM3-08 optimal for space- and reliability-constrained automotive and portable designs.
Availability
VTVS33ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and consumer USB 2.0 interfaces requiring stable component supply with full traceability and lifecycle management.
Supply support for VTVS33ASMF-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 VTVS eSMP® Series targets high-density ESD and surge protection in automotive and industrial electronics, emphasizing AEC-Q101 qualification, low capacitance, and compact SMF packaging for next-generation interface protection.
FAQ
What is the clamping voltage of the VTVS33ASMF-HM3-08 at its rated peak pulse current?
The VTVS33ASMF-HM3-08 clamps to a maximum of 55 V at its specified peak pulse current of 6.91 A (10/1000 μs waveform). This value is measured under standardized test conditions and ensures downstream ICs see voltage limited well below their absolute maximum ratings, directly supporting robust design margins in automotive and industrial applications where VTVS33ASMF-HM3-08 is deployed.
Is the VTVS33ASMF-HM3-08 qualified for automotive use?
The VTVS33ASMF-HM3-08 is offered in an AEC-Q101 qualified version (denoted by 'H' in the ordering code), validated for automotive applications including temperature cycling, high-temperature reverse bias, and mechanical shock. While the base part number VTVS33ASMF-HM3-08 includes the 'H' prefix indicating AEC-Q101 availability, final qualification status must be confirmed via Vishay's official datasheet revision and lot-specific certification for VTVS33ASMF-HM3-08.
What does the 'HM3-08' suffix in VTVS33ASMF-HM3-08 signify?
In VTVS33ASMF-HM3-08, 'H' indicates AEC-Q101 qualification, 'M' denotes halogen-free material compliance, '3' specifies lead (Pb)-free tin plating, and '-08' means 3,000 pieces per 7-inch reel (8 mm tape, MOQ = 30,000). This full ordering code defines environmental compliance, finish, packaging, and automotive suitability - all verified for VTVS33ASMF-HM3-08 per Vishay document 85891 Rev. 2.2.
Can VTVS33ASMF-HM3-08 be used for bidirectional signal lines like RS-485?
No - VTVS33ASMF-HM3-08 is a unidirectional TVS diode, intended for single-polarity protection such as power rails or grounded-signal lines. For bidirectional differential lines like RS-485, a dual-channel or bidirectional TVS (e.g., VTVS33BSMF variant) is required. Using VTVS33ASMF-HM3-08 on a floating RS-485 bus would provide incomplete protection and risk forward conduction during normal operation.
What is the thermal resistance of VTVS33ASMF-HM3-08, and how does it affect layout?
The thermal resistance (RthJL) of VTVS33ASMF-HM3-08 is 20 K/W junction-to-lead when mounted on an infinite heat sink. This low value enables efficient heat dissipation during transient events, reducing thermal stress. In practice, designers should maximize copper area connected to both terminals - especially the cathode - and avoid narrow traces to maintain this thermal performance, as verified in thermal characterization for VTVS33ASMF-HM3-08.
VTVS33ASMF-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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- Current - Peak Pulse (10/1000µs):
- 6.91A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 379pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS33ASMF-HM3-08 FAQ
1.How can I place an order for VTVS33ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS33ASMF-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 VTVS33ASMF-HM3-08 reliable?
The price and inventory of VTVS33ASMF-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 VTVS33ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS33ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS33ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS33ASMF-HM3-08?
VTVS33ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS33ASMF-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 VTVS33ASMF-HM3-08?
For technical support, including VTVS33ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS33ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS33ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS33ASMF-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 VTVS33ASMF-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS33ASMF-HM3-08?
All VTVS33ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS33ASMF-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 VTVS33ASMF-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS33ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS33ASMF-HM3-08 Tags
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