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Vishay General Semiconductor - Diodes Division VTVS21GSMF-M3-18
- Part No.:
- VTVS21GSMF-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS21GSMF-M3-18.pdf
- Description:
- TVS DIODE 20.5VWM 34VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,971
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Product details
Overview
VTVS21GSMF-M3-18 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 such as USB, HDMI, and automotive sensor interfaces. It features 20.5 V stand-off voltage (VRWM), 23.72–24.69 V reverse breakdown (VBR at IT = 1 mA), 34 V maximum clamping voltage (VC) at 11.67 A peak pulse current (IPPM), and ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the VTVS21GSMF-M3-18 datasheet, VTVS21GSMF-M3-18 pinout, VTVS21GSMF-M3-18 application, or VTVS21GSMF-M3-18 equivalent, this device delivers precise overvoltage clamping for high-reliability automotive and industrial signal lines where tight voltage tolerance (±2 % VBR), low capacitance (513 pF), and AEC-Q101 qualification are critical selection criteria.
Technical Context
This TVS diode operates in avalanche mode to clamp transient surges with a fast response time enabled by "Low-Noise" technology. Its unidirectional polarity supports DC-biased lines requiring asymmetric protection, and its 10/1000 μs waveform rating ensures robustness against lightning-induced and inductive-switching transients.
The device is rated for junction temperatures from –55 °C to +175 °C and features halogen-free molding compound compliant with UL 94 V-0. Its thermal resistance (RthJL = 20 K/W) and low-profile SMF package support high-density PCB layouts with wave and reflow soldering compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 20.5 V - Maximum continuous reverse voltage before clamping begins; sets operating margin for 19–21 V nominal supply rails. |
| Breakdown Voltage (VBR) | 23.72–24.69 V at IT = 1 mA (±2 % tolerance) - Tight VBR window enables predictable, repeatable clamping onset across temperature and production lots. |
| Clamping Voltage (VC) | 34 V at IPPM = 11.67 A (10/1000 μs) - Limits transient voltage seen by downstream ICs to safe levels during 400 W surge events. |
| Peak Pulse Power (PPP) | 400 W - Sustains standardized 10/1000 μs surges without degradation; suitable for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 applications. |
| Capacitance (CD) | 513 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 and CAN FD signal integrity while maintaining strong ESD suppression. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Exceeds industrial and automotive ESD immunity requirements without external filtering. |
| Operating Temperature | –55 °C to +175 °C - Enables deployment in under-hood automotive, motor control, and industrial power electronics environments. |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case with cathode marking bar; dimensions 3.9 mm × 1.9 mm × 1.08 mm; compatible with SOD-123W footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for unidirectional clamping | Connected to protected line; clamps positive transients to ground when cathode is held at system ground potential. |
| Cathode | Clamp output / ground reference | Must be tied directly to low-impedance system ground; determines clamping threshold relative to anode voltage swing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC standard - supports under-hood and ADAS sensor interface use. |
| ±2 % VBR tolerance | Narrower voltage spread than ±5 % variants (e.g., VTVS21ASMF), enabling tighter design margins and reduced risk of false triggering on nominal rail voltages. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and material categorization per Vishay Doc. #99912; no brominated flame retardants or antimony trioxide. |
| Low-profile SMF package | 1.08 mm height allows placement beneath connectors and in space-constrained modules; footprint matches industry-standard SOD-123W land pattern. |
| "Low-Noise" fast response | Sub-nanosecond turn-on enables effective suppression of ESD pulses before sensitive logic inputs are damaged - verified via TLP 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 and body electronics. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between signal line and chassis ground to shunt ESD and load-dump transients. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V microcontrollers and transceivers during ±30 kV ESD events and ISO 7637-2 Pulse 1. |
Use Scenario: Safeguarding D+ and D– lines of USB 2.0 ports in infotainment head units and telematics modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in back-to-back configuration) providing low-capacitance, high-speed ESD clamping. Use Value: Maintains signal integrity (513 pF) while meeting USB-IF ESD compliance and preventing data corruption during hot-plug events. |
| Industrial PLC Digital Input | DC Power Rail Surge Suppression |
|
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between input terminal and common ground to limit transient voltage to ≤34 V. Use Value: Ensures reliable operation under IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) test conditions without sacrificing response speed. |
Use Scenario: Secondary-level protection on 20–24 V DC power rails feeding motor drivers and solenoid controllers in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected unidirectional TVS absorbing residual energy after primary MOV or GDT stages. Use Value: Clamps post-MOV overshoot to <34 V, protecting downstream DC-DC converters and gate drivers from overvoltage stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | ±5 % VBR (22.2–24.5 V), higher VC = 32.4 V at 12.3 A, same 400 W PPP, SMA package (larger, 4.5 mm × 2.7 mm). | Less precise clamping onset; requires larger PCB area; not AEC-Q101 qualified. | Select when cost sensitivity outweighs automotive qualification and tight VBR tolerance needs. |
| VTVS21ASMF-M3-18 | Same VRWM (20.5 V), but ±5 % VBR (23.0–25.4 V); otherwise identical electrical specs and SMF package. | Broader VBR distribution increases risk of premature conduction near upper end of 20.5 V rail; suitable for non-automotive industrial use. | Choose for general-purpose protection where ±2 % tolerance is not required and lower cost is prioritized. |
Compared with VTVS21GSMF-M3-18, SMAJ20A offers slightly lower clamping voltage but lacks automotive qualification and precision; VTVS21ASMF-M3-18 matches form-factor and power rating but trades VBR accuracy for cost - making the G-series optimal for AEC-Q101-critical designs demanding consistent clamping behavior.
Availability
VTVS21GSMF-M3-18 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 data line protection, and industrial PLC digital inputs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for VTVS21GSMF-M3-18 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 high-speed ESD and surge protection in space-constrained applications, with emphasis on AEC-Q101 qualification, tight parametric tolerances, and compatibility with automated SMT assembly processes.
FAQ
What is the clamping voltage of the VTVS21GSMF-M3-18 at its rated peak pulse current?
The VTVS21GSMF-M3-18 has a maximum reverse clamping voltage (VC) of 34 V when subjected to its rated 11.67 A peak pulse current (IPPM) under the 10/1000 μs waveform condition. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during a full-power transient event. The clamping performance is guaranteed across the full operating temperature range (–55 °C to +175 °C) and is integral to the device's role in safeguarding sensitive 20–24 V interface circuits.
Is the VTVS21GSMF-M3-18 qualified for automotive applications?
Yes, the VTVS21GSMF-M3-18 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per the AEC-Q101 standard. This qualification confirms its suitability for automotive applications such as engine control modules, body electronics, and ADAS sensor interfaces where reliability under harsh thermal and electrical conditions is mandatory. The VTVS21GSMF-M3-18 carries the "G" suffix denoting ±2 % VBR tolerance, a key requirement for precision automotive clamping.
What does the "-M3-18" suffix indicate in VTVS21GSMF-M3-18?
The "-M3-18" suffix in VTVS21GSMF-M3-18 specifies packaging and environmental compliance: "M" denotes halogen-free and RoHS-compliant construction; "3" indicates 3000 pieces per 7-inch reel (8 mm tape); and "18" is the date code for the 18th week of 2021. This ordering code ensures traceability, lead-free terminations, and compatibility with standard SMT pick-and-place equipment - all confirmed in Vishay Document #85891 Rev. 2.2.
How does the VTVS21GSMF-M3-18 compare to the VTVS21ASMF-M3-18 in terms of voltage tolerance?
The VTVS21GSMF-M3-18 features ±2 % reverse breakdown voltage (VBR) tolerance (23.72–24.69 V), whereas the VTVS21ASMF-M3-18 has ±5 % tolerance (23.0–25.4 V). This tighter specification reduces variation in clamping onset across production lots and temperature, improving predictability in safety-critical automotive and industrial designs. Both share identical VRWM (20.5 V), VC (34 V), and package (SMF), making the G-series the preferred choice where voltage precision directly impacts system robustness.
Can the VTVS21GSMF-M3-18 be used for bidirectional signal line protection?
No, the VTVS21GSMF-M3-18 is a unidirectional TVS diode and is not suitable for direct bidirectional protection. It conducts only during positive transients relative to its cathode. For bidirectional applications like USB or RS-485, two VTVS21GSMF-M3-18 devices must be connected in series opposition (anode-to-anode or cathode-to-cathode), or a dedicated bidirectional TVS such as VTVS21BGMF-M3-18 should be selected. Using a single unidirectional device on AC-coupled or floating lines risks failure during negative excursions.
VTVS21GSMF-M3-18 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):
- 20.5V
- Voltage - Breakdown (Min):
- 23.72V
- Voltage - Clamping (Max) @ Ipp:
- 34V
- Current - Peak Pulse (10/1000µs):
- 11.67A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 513pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS21GSMF-M3-18 FAQ
1.How can I place an order for VTVS21GSMF-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS21GSMF-M3-18 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 VTVS21GSMF-M3-18 reliable?
The price and inventory of VTVS21GSMF-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS21GSMF-M3-18 is usually 5 days.
3.What payment methods are accepted for VTVS21GSMF-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS21GSMF-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS21GSMF-M3-18?
VTVS21GSMF-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS21GSMF-M3-18 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 VTVS21GSMF-M3-18?
For technical support, including VTVS21GSMF-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS21GSMF-M3-18 requirements.
6.How does Aetrix verify that VTVS21GSMF-M3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS21GSMF-M3-18 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 VTVS21GSMF-M3-18 meets industry standards.
7.What is the process for return or replacement of VTVS21GSMF-M3-18?
All VTVS21GSMF-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS21GSMF-M3-18, 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 VTVS21GSMF-M3-18 part is unused and in its original packaging.
Return procedure for VTVS21GSMF-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS21GSMF-M3-18 Tags
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