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Vishay General Semiconductor - Diodes Division 6DFN20A-M3/I
- Part No.:
- 6DFN20A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN20A-M3/I.pdf
- Description:
- 600W,20V 5%, DFN3820A TVS
- Quantity:
- Payment:
- Shipping:
Inventory:13,980
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Product details
Overview
6DFN20A-M3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DFN3820A package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It delivers 600 W peak pulse power (10/1000 μs), 21.7 A peak pulse current, and clamps at 27.7 V while maintaining 17.1 V stand-off voltage - deployed in sensor interface protection for industrial control systems.
For engineers reviewing the 6DFN20A-M3/I datasheet, 6DFN20A-M3/I pinout, 6DFN20A-M3/I application, or 6DFN20A-M3/I equivalent, key selection criteria include unidirectional polarity, 20 V nominal breakdown voltage, MSL Level 1 reflow compatibility, side-wettable flanks for AOI, and 175 °C max junction temperature.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low clamping ratio (VC/VBR ≈ 1.39) and stable breakdown behavior across temperature. Its unidirectional configuration enables asymmetric protection on DC-biased lines without reverse leakage degradation at 150 °C.
The DFN3820A package integrates thermal performance with RθJM = 5 °C/W (typ.) and RθJA = 140 °C/W (typ.), enabling effective heat transfer to PCB copper when mounted per JEDEC 51-14 TDIM methodology. ESD immunity meets IEC 61000-4-2 ±30 kV (contact/air).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable turn-on above 17.1 V operating voltage with ±5 % tolerance |
| VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA at 25 °C |
| IPPM (10/1000 μs) | 21.7 A - peak surge current capability for lightning and inductive switching transients |
| VC @ IPPM | 27.7 V - clamping voltage limiting downstream IC stress during full-rated surge event |
| TJ max | +175 °C - supports operation in high-temperature industrial environments without derating |
| ESD Rating | ±30 kV per IEC 61000-4-2 - protects against human-body-model and contact-discharge events |
| Package | DFN3820A - 3.95 mm × 2.18 mm × 0.88 mm low-profile leadless package with side-wettable flanks |
Pinout & Package
DFN3820A package: 2-terminal surface-mount device with cathode marked by color band; anode connected to exposed thermal pad (heatsink); dimensions 3.95 mm × 2.18 mm × 0.88 mm; MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (thermal pad) | Current return path & thermal interface | Exposed copper pad serves as primary heat sink and electrical connection to ground plane |
| Cathode (marked side) | Transient conduction terminal | Connected to protected line; conducts surge current to ground when VWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joint quality on both lateral edges |
| Low-profile height (0.88 mm) | Reduces board stack height and improves mechanical robustness in space-constrained modules |
| Halogen-free, RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and JESD201 Class 2 whisker resistance |
| Junction passivation | Stabilizes VBR drift over temperature (αT = 0.082 %/°C) and extends lifetime under repeated surges |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and MCU ADC input. Use Value: Limits transient voltage to ≤27.7 V during 21.7 A surge, preventing ADC saturation and latch-up in downstream 3.3 V or 5 V microcontrollers. | Use Scenario: Safeguarding LIN bus transceiver inputs against load dump and battery reversal-induced spikes in door module ECUs. IC Role / Device Role / Timing Role: Standoff protection element on LIN data line referenced to vehicle chassis ground. Use Value: Maintains 17.1 V working voltage margin while clamping 10/1000 μs surges to 27.7 V, preserving signal integrity below LIN physical layer thresholds. |
| Medical Patient Monitor Front-End | Telecom Power Supply Input |
Use Scenario: Shielding ECG electrode amplifier inputs from ESD events during clinical handling and cable coupling. IC Role / Device Role / Timing Role: First-line transient suppressor on biopotential signal path prior to instrumentation amplifier. Use Value: Delivers ±30 kV IEC 61000-4-2 immunity with <1 μA leakage at 17.1 V, avoiding DC offset errors in high-gain analog front-ends. | Use Scenario: Secondary surge suppression on 24 V DC input rail of PoE-powered network switches after primary MOV stage. IC Role / Device Role / Timing Role: Fast-response clamping device coordinating with upstream slow-acting protectors to handle combined surge energy. Use Value: Provides precise 20 V breakdown threshold and 27.7 V clamping to prevent overvoltage damage to DC-DC controllers rated for 36 V max input. |
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 | DO-214AC package; higher RθJA (150 °C/W); 20 V VBR, 32.4 V VC @ 17.3 A | Larger footprint (4.5 × 2.7 mm); no side-wettable flanks; less suitable for AOI-reliant SMT lines | Select when legacy through-hole or larger SMT layout exists and AOI is not required. |
| SMF20A | SOD-123FL package; lower PPPM (200 W); 20 V VBR, 32.4 V VC @ 6.2 A | Smaller size (2.7 × 1.7 mm) but insufficient for 600 W surge events; limited thermal mass | Choose only for low-energy ESD-only scenarios where 21.7 A surge current is not expected. |
Compared with SMAJ20A and SMF20A, the 6DFN20A-M3/I provides superior thermal dissipation (RθJM = 5 °C/W), tighter clamping (27.7 V vs. ≥32.4 V), and AOI-compatible packaging - making it optimal for high-reliability, high-volume industrial and automotive PCB assembly.
Availability
6DFN20A-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, medical monitoring equipment, and telecom power supply designs requiring stable component supply and long-term manufacturability.
Supply support for 6DFN20A-M3/I 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and AEC-Q101 qualification.
The 6DFNxxA series is engineered for high-density, automated manufacturing environments - delivering robust transient suppression in ultra-low-profile DFN packages optimized for AOI, thermal management, and industrial-grade environmental resilience.
FAQ
What is the breakdown voltage tolerance of the 6DFN20A-M3/I?
The 6DFN20A-M3/I has a nominal breakdown voltage of 20.0 V with a tolerance of ±5 %, specified as 19.0 V (min) to 21.0 V (max) at 1.0 mA test current. This tight tolerance ensures consistent clamping behavior across production lots and supports precise system-level overvoltage margin design in applications like sensor signal conditioning and power rail protection.
Does the 6DFN20A-M3/I support lead-free reflow soldering?
Yes, the 6DFN20A-M3/I is qualified for lead-free reflow up to 260 °C peak temperature and meets MSL Level 1 per J-STD-020. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards, and the M3 suffix confirms halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance - essential for high-reliability industrial and automotive assembly.
How does the 6DFN20A-M3/I compare to standard SMAJ diodes in thermal performance?
The 6DFN20A-M3/I achieves RθJM = 5 °C/W (typ.), significantly lower than SMAJ20A's ~15 °C/W, due to its exposed anode thermal pad directly coupled to PCB copper. This enables more efficient heat extraction during repetitive surge events. In contrast, SMAJ20A relies on lead-frame conduction, resulting in higher junction temperature rise and earlier thermal derating above 25 °C ambient.
Can the 6DFN20A-M3/I be used in bidirectional signal line protection?
No, the 6DFN20A-M3/I is unidirectional and must be used with correct polarity - cathode toward the protected line, anode to ground. For bidirectional protection (e.g., USB, RS-485), a dual-diode configuration or dedicated bidirectional TVS like 6DFN20CA is required. Using 6DFN20A-M3/I on AC-coupled or floating lines without DC bias may result in unintended conduction or failure to clamp negative transients.
What is the maximum clamping voltage of the 6DFN20A-M3/I under full-rated surge conditions?
The 6DFN20A-M3/I clamps to a maximum of 27.7 V when subjected to its full-rated 21.7 A peak pulse current (10/1000 μs waveform). This clamping voltage is measured at the device terminals under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry - critical for ensuring compatibility with 3.3 V, 5 V, or 24 V logic and analog components downstream.
6DFN20A-M3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- 2-VDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN3820A
6DFN20A-M3/I FAQ
1.How can I place an order for 6DFN20A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN20A-M3/I 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 6DFN20A-M3/I reliable?
The price and inventory of 6DFN20A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 6DFN20A-M3/I is usually 5 days.
3.What payment methods are accepted for 6DFN20A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN20A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN20A-M3/I?
6DFN20A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN20A-M3/I 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 6DFN20A-M3/I?
For technical support, including 6DFN20A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN20A-M3/I requirements.
6.How does Aetrix verify that 6DFN20A-M3/I is sourced from the original manufacturer or authorized distributors?
All 6DFN20A-M3/I 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 6DFN20A-M3/I meets industry standards.
7.What is the process for return or replacement of 6DFN20A-M3/I?
All 6DFN20A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN20A-M3/I, 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 6DFN20A-M3/I part is unused and in its original packaging.
Return procedure for 6DFN20A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN20A-M3/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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