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Vishay General Semiconductor - Diodes Division VTVS33GSMF-HM3-18
- Part No.:
- VTVS33GSMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS33GSMF-HM3-18.pdf
- Description:
- TVS DIODE 33.3VWM 55VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,578
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Product details
Overview
VTVS33GSMF-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 33.3 V DC power rails and signal lines. It features 38.27 V minimum and 39.84 V maximum reverse breakdown voltage at 1 mA, 55 A peak pulse current (10/1000 μs), and clamps to ≤55 V at rated current - used in automotive infotainment power inputs and industrial sensor interfaces.
For engineers reviewing the VTVS33GSMF-HM3-18 datasheet, VTVS33GSMF-HM3-18 pinout, VTVS33GSMF-HM3-18 application, or VTVS33GSMF-HM3-18 equivalent, key selection criteria include ±2 % VBR tolerance, 33.3 V stand-off voltage, 379 pF capacitance at 0 V, AEC-Q101 qualification eligibility, and halogen-free SOD-123W-compatible packaging.
Technical Context
This device operates as a unidirectional avalanche diode with precise 33.3 V working voltage and tight ±2 % breakdown tolerance, enabling reliable overvoltage clamping without false triggering in 3.3 V–5 V logic-supplied systems. Its low 20 K/W thermal resistance (junction-to-lead) supports sustained energy dissipation under repetitive transients.
The SMF package delivers 1.08 mm height and 3.9 mm length, matching SOD-123W footprint requirements while maintaining 175 °C max junction temperature and IEC 61000-4-2 ±30 kV contact/air discharge compliance - critical for compact automotive and portable electronics designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 38.27 V / 39.84 V at IT = 1 mA - ensures accurate clamping onset above 33.3 V nominal rail without premature conduction |
| VRWM | 33.3 V maximum - defines safe continuous reverse operating voltage for 33 V power line protection |
| IPPM | 55 A (10/1000 μs) - sustains 400 W transient power without degradation in automotive load-dump scenarios |
| VC | ≤55 V at IPPM - limits downstream IC stress during ESD events on CAN or LIN bus nodes |
| CD | 379 pF at VR = 0 V, 1 MHz - compatible with <100 Mbps data lines when placed at connector entry points |
| TJ max | +175 °C - supports under-hood automotive placement with no derating up to ambient +125 °C |
| ESD rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity for human-body-model robustness |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount case with cathode bar marking; dimensions 3.9 mm × 1.9 mm × 1.08 mm; compatible with SOD-123W, SOD-123F, and SOD-123FL footprints; reflow solderable per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to ground or low-impedance return plane to complete surge current loop |
| Cathode | Protected line connection point | Connected directly to the 33.3 V rail or signal line requiring clamping; marked by bar on top surface |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Handles ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems without failure |
| ±2 % VBR tolerance | Enables tighter system-level margin control vs. ±5 % variants, reducing need for guard-banding in safety-critical rails |
| "Low-Noise" fast response | Sub-nanosecond turn-on time prevents ESD-induced latch-up in adjacent CMOS circuitry |
| AEC-Q101 qualification option | Supports automotive-grade procurement with traceable lot-level reliability testing (HTOL, TC, UHAST) |
| Halogen-free, RoHS-compliant | Meets EU Directive 2011/65/EU and JIS C 0950:2017 for green manufacturing and end-of-life processing |
Applications
| Automotive Infotainment Power Input | Industrial RS-485 Transceiver Protection |
|---|---|
|
Use Scenario: 33 V supply rail feeding head unit MCU and display driver ICs exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between rail and chassis ground, clamping surges before they reach LDOs and PMICs. Use Value: Limits peak voltage to ≤55 V during 55 A transients, preserving 33 V rail integrity and avoiding brownout resets. |
Use Scenario: RS-485 differential pair (A/B) and common-mode bias line in factory automation PLC modules. IC Role / Device Role / Timing Role: Rail-to-rail TVS on each line, referenced to local ground, suppressing ESD and lightning-induced common-mode spikes. Use Value: 379 pF capacitance avoids signal edge degradation at 10 Mbps, while ±30 kV ESD rating prevents port lockup during field maintenance. |
| Medical Patient Monitor Sensor Interface | Smart Meter Battery Backup Circuit |
|
Use Scenario: Analog front-end input protecting ECG/SpO₂ sensor amplifiers from electrostatic discharge during cable handling. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal path from sensor connector to instrumentation amplifier input. Use Value: Clamps 8 kV HBM ESD pulses within 1 ns, preventing amplifier saturation and baseline drift without adding noise. |
Use Scenario: 33 V supercapacitor backup rail in utility smart meters subjected to grid switching transients. IC Role / Device Role / Timing Role: Standoff-rated TVS across capacitor terminals to absorb 400 W surge energy during AC line reconnection. Use Value: Withstands 175 °C junction temperature, ensuring long-term reliability in sealed, thermally constrained meter enclosures. |
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-E3/5A | ±5 % VBR (37.1–41.0 V), same 400 W rating, SMA package (larger footprint) | Higher VBR spread increases risk of false triggering near 33.3 V rail; SMA requires more PCB area | Select when cost sensitivity outweighs precision clamping and board space constraints |
| TPSMD33CA | Bidirectional configuration, 33 V symmetric clamping, 400 W rating, same SMF package | Protects AC-coupled or differential signals where polarity reversal occurs; not suitable for unidirectional DC rails | Choose only for bidirectional signal paths like USB D+/D− or Ethernet PHY interfaces |
Compared with VTVS33GSMF-HM3-18, SMAJ33A-E3/5A trades tighter voltage tolerance for lower cost and broader vendor availability, while TPSMD33CA provides symmetrical clamping essential for AC signals but cannot replace unidirectional rail protection without circuit redesign.
Availability
VTVS33GSMF-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment, industrial communications, medical sensor interfaces, and smart metering applications requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for VTVS33GSMF-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.
VTVS33GSMF-HM3-18 belongs to Vishay's TransZorb® eSMP® Series, engineered specifically for high-power, low-profile transient suppression in space-constrained automotive and industrial environments.
FAQ
What is the exact reverse standoff voltage (VRWM) specification for VTVS33GSMF-HM3-18?
The VTVS33GSMF-HM3-18 has a maximum reverse standoff voltage (VRWM) of 33.3 V at 25 °C, meaning it remains non-conductive up to this DC or continuous AC voltage level - critical for protecting 33 V power rails without leakage-induced power loss or false triggering.
Does VTVS33GSMF-HM3-18 meet automotive qualification standards?
VTVS33GSMF-HM3-18 is offered in an AEC-Q101 qualified version (denoted by "H" in the part number suffix); the "HM3-18" variant supports automotive-grade procurement with full reliability test reports including HTOL, temperature cycling, and unbiased HAST - required for under-hood and infotainment applications.
How does the ±2 % VBR tolerance of VTVS33GSMF-HM3-18 improve system design margin?
The ±2 % VBR tolerance (38.27 V to 39.84 V) of VTVS33GSMF-HM3-18 reduces uncertainty in clamping onset versus ±5 % alternatives, allowing tighter design margins around the 33.3 V VRWM - minimizing overdesign of downstream regulators and improving overall power efficiency in regulated 33 V systems.
What is the thermal resistance (RthJL) of VTVS33GSMF-HM3-18 and why does it matter?
VTVS33GSMF-HM3-18 has a thermal resistance RthJL of 20 K/W (junction-to-lead) when mounted on an infinite heat sink. This value determines how effectively heat from transient energy dissipation transfers to the PCB copper, directly impacting reliability during repetitive surge events - lower RthJL enables higher duty-cycle operation.
Is VTVS33GSMF-HM3-18 compatible with standard SOD-123W PCB footprints?
Yes, VTVS33GSMF-HM3-18 uses the SMF (DO-219AB) package, which Vishay explicitly states is compatible with SOD-123W, SOD-123F, and SOD-123FL case outlines - enabling drop-in replacement on existing layouts without footprint modification or rework.
VTVS33GSMF-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):
- 33.3V
- Voltage - Breakdown (Min):
- 38.27V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- Current - Peak Pulse (10/1000µs):
- 7.11A
- 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)
VTVS33GSMF-HM3-18 FAQ
1.How can I place an order for VTVS33GSMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS33GSMF-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 VTVS33GSMF-HM3-18 reliable?
The price and inventory of VTVS33GSMF-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 VTVS33GSMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS33GSMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS33GSMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS33GSMF-HM3-18?
VTVS33GSMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS33GSMF-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 VTVS33GSMF-HM3-18?
For technical support, including VTVS33GSMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS33GSMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS33GSMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS33GSMF-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 VTVS33GSMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS33GSMF-HM3-18?
All VTVS33GSMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS33GSMF-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 VTVS33GSMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS33GSMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS33GSMF-HM3-18 Tags
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