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Vishay General Semiconductor - Diodes Division 6DFN43A-M3/I
- Part No.:
- 6DFN43A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN43A-M3/I.pdf
- Description:
- 600W,43V 5%, DFN3820A TVS
- Quantity:
- Payment:
- Shipping:
Inventory:13,999
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Product details
Overview
6DFN43A-M3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DFN3820A package, designed for robust ESD and surge protection of low-voltage signal lines. It features 43.0 V nominal breakdown voltage (VBR), 36.8 V working peak reverse voltage (VWM), 59.3 V maximum clamping voltage (VC) at 10.1 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs). It is deployed in sensor interface protection for industrial automation systems.
For engineers reviewing the 6DFN43A-M3/I datasheet, 6DFN43A-M3/I pinout, 6DFN43A-M3/I application, or 6DFN43A-M3/I equivalent, key selection criteria include clamping performance under 10/1000 μs transients, thermal resistance (RθJM = 5 °C/W), side-wettable flank compatibility with AOI, and M3-grade halogen-free RoHS compliance for high-reliability PCB assembly.
Technical Context
This device implements an anisotropic rectifier structure with junction passivation optimized for fast response to ESD events (IEC 61000-4-2 ±30 kV contact/air) and repetitive surge transients. Its unidirectional configuration enables precise polarity-aware protection on DC-biased lines without reverse conduction leakage issues.
The DFN3820A package delivers low thermal resistance to mount (RθJM = 5 °C/W typical) and supports automated optical inspection via side-wettable flanks. It operates across -65 °C to +175 °C junction temperature range and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 43.0 V - Ensures reliable triggering above 36.8 V operating voltage while maintaining margin against false clamping. |
| VC @ IPPM | 59.3 V - Limits downstream IC stress during 10.1 A 10/1000 μs surge, critical for 3.3 V–5 V logic interface protection. |
| PPPM | 600 W - Sustains high-energy lightning-induced transients per IEC 61000-4-5 (Level 3/4) without failure. |
| RθJM | 5 °C/W - Enables efficient heat transfer to PCB copper pour, supporting continuous operation near TJ max (175 °C). |
| ESD Rating | ±30 kV (IEC 61000-4-2) - Protects sensitive analog front-ends and digital I/O against human-body-model discharges. |
| Package | DFN3820A - 3.95 mm × 2.18 mm footprint with side-wettable flanks for AOI-compatible solder joint inspection. |
Pinout & Package
DFN3820A is a 2-terminal surface-mount package with exposed anode pad (heatsink) and cathode marked by color band. Dimensions: 3.95 mm × 2.18 mm × 0.88 mm (L × W × H); terminal pitch: 1.93 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (exposed pad) | Power return path / thermal interface | Directly connected to PCB ground plane for low-inductance surge current return and enhanced thermal dissipation. |
| Cathode (marked lead) | Transient sensing and clamping node | Connected to protected line; conducts when voltage exceeds VBR, shunting surge energy to anode ground. |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100% automated optical inspection (AOI) of solder fillet integrity without X-ray, reducing post-reflow defect escapes. |
| Low-profile height (0.88 mm) | Supports ultra-thin end equipment designs (e.g., portable medical sensors, wearables) where Z-height is constrained. |
| M3 material grade | Halogen-free, RoHS-compliant, Pb-free terminations qualified to JESD 201 Class 2 whisker resistance for long-term reliability. |
| Junction passivated anisotropic rectifier | Delivers stable VBR over temperature (αT = 0.092 %/°C) and <1 μA leakage at VWM, minimizing standby power loss. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protection of 4–20 mA current-loop transmitters and RS-485 bus nodes against load dump and inductive switching surges in factory-floor PLCs. IC Role / Device Role: Primary TVS clamp placed directly at connector entry point before signal conditioning amplifier. Use Value: Clamps transients to ≤59.3 V, preventing damage to precision op-amps and ADCs rated for ≤60 V absolute maximum input. | Use Scenario: ESD protection of LIN bus transceivers and door module switch inputs exposed to human touch in passenger compartments. IC Role / Device Role: Unidirectional TVS on LIN data line (biased at 12 V) to absorb ±30 kV contact discharge per IEC 61000-4-2. Use Value: Maintains <1 μA leakage at 12 V VWM, avoiding false wake-up or battery drain in always-on vehicle subsystems. |
| Medical Patient Monitor Front-End | Telecom Optical Transceiver Bias Line |
Use Scenario: Surge suppression on ECG electrode inputs and isolated analog sensor paths in Class II medical devices. IC Role / Device Role: First-line protection element between patient-connected circuitry and isolation barrier, meeting IEC 60601-1 creepage/clearance requirements. Use Value: Withstands 175 °C max junction temperature and passes UL 94 V-0 molding compound rating, supporting sterilization and safety compliance. | Use Scenario: Transient protection of laser diode bias supply rails (3.3 V/5 V) in SFP+ and QSFP modules subjected to hot-plug ESD. IC Role / Device Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed adjacent to laser driver IC to avoid signal integrity degradation. Use Value: Provides 600 W surge handling without compromising high-speed modulation bandwidth due to minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-Q | DO-214AC (SMA) package; higher RθJA (110 °C/W); same VBR/VC specs but larger footprint. | Less suitable for space-constrained PCBs; requires manual or wave-soldering instead of full SMT automation. | Select when legacy SMA layout exists or when higher thermal mass is needed for infrequent high-energy surges. |
| SMCJ43A | DO-214AB (SMC) package; 1500 W PPPM; larger size (7.11 mm × 6.22 mm); higher clamping (64.5 V). | Better for high-power industrial motor drives but over-specified for signal-line protection. | Choose only if system-level testing confirms need for >600 W surge handling or if existing SMC footprint must be reused. |
Compared with SMAJ43A-Q and SMCJ43A, the 6DFN43A-M3/I offers superior board-area efficiency (3.95 mm × 2.18 mm), AOI-ready side-wettable flanks, and lower thermal resistance to mount-making it optimal for high-density, automated production of modern sensor and communication modules.
Availability
6DFN43A-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and medical monitoring equipment requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow capability.
Supply support for 6DFN43A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The 6DFNxxA series is part of Vishay's TRANSZORB® TVS platform engineered for compact, high-performance transient suppression in space- and thermally-constrained applications across industrial, automotive, and medical markets.
FAQ
What is the maximum clamping voltage of the 6DFN43A-M3/I under a 10/1000 μs surge?
The 6DFN43A-M3/I has a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 10.1 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 98464 and ensures protected circuits remain below critical voltage thresholds during surge events. The 6DFN43A-M3/I maintains this clamping performance across its full operating temperature range.
Does the 6DFN43A-M3/I meet automotive qualification standards?
The 6DFN43A-M3/I is rated for industrial-grade operation (M3 suffix) and meets J-STD-020 MSL Level 1 with 260 °C reflow peak, but it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101 certification, Vishay offers the H-suffix variants (e.g., 6DFN43A-H), which undergo additional stress testing. The 6DFN43A-M3/I remains suitable for non-safety-critical automotive subsystems like body control modules where industrial-grade reliability suffices.
How does the DFN3820A package of the 6DFN43A-M3/I support automated optical inspection?
The 6DFN43A-M3/I uses the DFN3820A package with side-wettable flanks-copper terminals extended vertically along the package edges-to enable clear visibility of solder fillets during automated optical inspection (AOI). This design eliminates the need for X-ray inspection of solder joints, reduces process validation time, and improves first-pass yield in high-volume SMT lines. The 6DFN43A-M3/I's side-wettable feature is explicitly validated per JEDEC J-STD-020 and supported by Vishay's packaging documentation.
What is the thermal resistance from junction to mount (RθJM) for the 6DFN43A-M3/I?
The 6DFN43A-M3/I has a typical junction-to-mount thermal resistance (RθJM) of 5 °C/W, as specified in the Thermal Characteristics table of Vishay document 98464. This low value is achieved through the exposed anode pad acting as a direct thermal path to the PCB copper pour. When mounted on a 2 oz. FR4 board with adequate thermal vias, the 6DFN43A-M3/I sustains repeated surge events without exceeding its 175 °C maximum junction temperature.
Is the 6DFN43A-M3/I compatible with lead-free reflow profiles?
Yes, the 6DFN43A-M3/I is fully compatible with lead-free reflow profiles, including peak temperatures up to 260 °C, and is rated 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 qualification to JESD 201 Class 2 whisker resistance. The 6DFN43A-M3/I has been validated for standard SAC305 reflow cycles without delamination or solder joint integrity loss.
6DFN43A-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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 10.1A
- 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
6DFN43A-M3/I FAQ
1.How can I place an order for 6DFN43A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN43A-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 6DFN43A-M3/I reliable?
The price and inventory of 6DFN43A-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 6DFN43A-M3/I is usually 5 days.
3.What payment methods are accepted for 6DFN43A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN43A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN43A-M3/I?
6DFN43A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN43A-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 6DFN43A-M3/I?
For technical support, including 6DFN43A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN43A-M3/I requirements.
6.How does Aetrix verify that 6DFN43A-M3/I is sourced from the original manufacturer or authorized distributors?
All 6DFN43A-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 6DFN43A-M3/I meets industry standards.
7.What is the process for return or replacement of 6DFN43A-M3/I?
All 6DFN43A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN43A-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 6DFN43A-M3/I part is unused and in its original packaging.
Return procedure for 6DFN43A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN43A-M3/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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