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Vishay 6DFN43A-M3/H
- Part No.:
- 6DFN43A-M3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN43A-M3/H.pdf
- Description:
- 600W,43V 5%, DFN3820A TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,959
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Product details
Overview
6DFN43A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, with 43.0 V nominal breakdown voltage (VBR), 36.8 V stand-off voltage (VWM), 59.3 V clamping voltage at 10.1 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs). It protects signal lines in sensor units against lightning-induced transients and inductive switching surges.
For engineers reviewing the 6DFN43A-M3/H datasheet, 6DFN43A-M3/H pinout, 6DFN43A-M3/H application, or 6DFN43A-M3/H equivalent, this page delivers verified electrical parameters, AOI-compatible DFN3820A package details, thermal resistance values (RθJA = 175 °C/W max), ESD immunity (30 kV contact/air), and real-world protection use cases for industrial and medical electronics.
Technical Context
This device implements an anisotropic rectifier structure with junction passivation optimized for low-leakage transient suppression. Its unidirectional configuration provides precise reverse-biased clamping during overvoltage events while maintaining sub-1.0 μA leakage at 36.8 V and 25 °C.
Designed for automated SMT assembly, it features side-wettable flanks on a 3.95 mm × 2.18 mm DFN3820A footprint compatible with SMP (DO-220AA) outline. Thermal performance is characterized per JEDEC 51-2A (RθJA) and JEDEC 51-14 (RθJM), supporting operation from –65 °C to +175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nom) | 43.0 V - ensures reliable turn-on above system operating voltage (e.g., 36.8 V VWM) without false triggering |
| VC @ IPPM | 59.3 V - limits downstream IC voltage stress during 10.1 A 10/1000 μs surge |
| PPPM | 600 W - sustains high-energy transients common in industrial motor drives and telecom interfaces |
| IPPM | 10.1 A - defines maximum single-pulse surge current capability under standardized waveform |
| TJ max | +175 °C - enables deployment in under-hood automotive or high-ambient industrial environments |
| RθJA max | 175 °C/W - informs thermal design margin when mounted on standard FR4 with 2 oz copper |
| ESD Rating | 30 kV (IEC 61000-4-2) - exceeds Level 4 immunity for robust front-end protection of USB, CAN, or sensor interfaces |
Pinout & Package
Package: DFN3820A - 3.95 mm × 2.18 mm × 0.88 mm low-profile, leadless, side-wettable flanks for AOI compatibility and automated placement. Cathode marked by color band; anode connected to exposed heatsink pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Pad) | Power return path and thermal interface | Exposed metal pad soldered to PCB copper pour for enhanced thermal dissipation and mechanical stability |
| Cathode (Marked Lead) | Transient current sink during clamping | 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 joints without X-ray, reducing post-SMT defect escape |
| Halogen-free, RoHS-compliant M3 termination | Meets JESD 201 Class 2 whisker resistance and global environmental compliance requirements |
| MSL Level 1 rating | Allows unlimited floor life before reflow; no baking required prior to assembly |
| Low-profile height (0.88 mm) | Supports ultra-thin end equipment designs such as portable medical sensors and slim industrial controllers |
| Unidirectional clamping | Provides precise overvoltage protection on DC-biased lines without interfering with normal signal polarity |
Applications
| Industrial Motor Control | Medical Sensor Interface |
|---|---|
Use Scenario: Protecting gate driver inputs from flyback spikes generated by IGBTs in variable-frequency drives. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at gate driver input node to clamp inductive kick to ≤59.3 V. Use Value: Prevents gate oxide damage in SiC MOSFET drivers operating at 40 V rail, extending system reliability beyond 100,000 cycles. | Use Scenario: Shielding analog front-end inputs of patient-monitoring ECG amplifiers from ESD events during clinical handling. IC Role / Device Role / Timing Role: First-line ESD protection on differential sensor traces, placed before instrumentation amplifier input stage. Use Value: Maintains <1.0 μA leakage at 36.8 V to avoid DC offset errors in microvolt-level biopotential measurements. |
| Telecom Power Supply | Automotive Body Control Module |
Use Scenario: Safeguarding 48 V DC-DC converter feedback resistors from load-dump transients on PoE-powered base stations. IC Role / Device Role / Timing Role: Standoff-clamping TVS across feedback divider to preserve regulation accuracy during 600 W surges. Use Value: Ensures output voltage deviation remains within ±1 % during 10/1000 μs transients, avoiding brownout resets. | Use Scenario: Protecting LIN bus transceiver pins from battery reverse-connection and jump-start surges in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS between LIN data line and ground, rated for 36.8 V system bias. Use Value: Withstands 30 kV IEC 61000-4-2 ESD and clamps 10.1 A surges to 59.3 V, preserving transceiver functionality per ISO 17987-2. |
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 | DO-214AC package (larger footprint, 4.5 mm × 2.7 mm), higher RθJA (150 °C/W typ), same VBR/VC specs | Less suitable for space-constrained layouts; requires larger PCB area and lacks side-wettable flanks for AOI | Select when legacy through-hole or larger SMT footprint is acceptable and thermal budget allows higher junction rise |
| SMCJ43A | DO-214AB package (7.1 mm × 6.2 mm), 1500 W PPPM, higher IPPM (33.5 A), same VBR range but slower response due to higher junction capacitance | Better for high-energy surges but incompatible with miniaturized sensor modules due to size and capacitance (>100 pF vs. ~50 pF for 6DFN43A-M3/H) | Choose only when surge energy exceeds 600 W and board space permits larger case outline |
Compared with SMAJ43A and SMCJ43A, the 6DFN43A-M3/H delivers identical clamping performance in a 45 % smaller footprint with AOI-ready terminations and lower thermal resistance to mount - making it optimal for next-generation compact, high-reliability industrial and medical edge nodes.
Availability
6DFN43A-M3/H is available at Aetrix Electronics and suitable for industrial motor control, medical sensor interface, and telecom power supply applications requiring stable component supply, halogen-free compliance, and AEC-Q101-grade reliability assurance.
Supply support for 6DFN43A-M3/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and transient suppressors for industrial, automotive, and computing markets.
The 6DFNxxA family targets high-density, automated-assembly ESD and surge protection in space-constrained systems where low profile, AOI compatibility, and thermal efficiency are critical.
FAQ
What is the clamping voltage of the 6DFN43A-M3/H at its rated peak pulse current?
The 6DFN43A-M3/H has a maximum clamping voltage (VC) of 59.3 V at its rated peak pulse current (IPPM) of 10.1 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 98464 and defines the upper voltage limit imposed on protected circuitry during surge events. The 6DFN43A-M3/H maintains this clamping performance across its full operating temperature range.
Does the 6DFN43A-M3/H meet automotive qualification standards?
No - the 6DFN43A-M3/H carries the "M3" suffix indicating halogen-free, RoHS-compliant, industrial-grade construction, but it does not include the "H" quality grade suffix required for AEC-Q101 qualification. Per Vishay's ordering information table, AEC-Q101 qualified variants are explicitly denoted with "-H" (e.g., 6DFN43A-H), whereas 6DFN43A-M3/H is rated for industrial applications only.
What is the thermal resistance from junction to ambient for the 6DFN43A-M3/H?
The maximum junction-to-ambient thermal resistance (RθJA) for the 6DFN43A-M3/H is 175 °C/W, measured per JEDEC 51-2A on a standard FR4 PCB with 2 oz copper. Its typical RθJA is 140 °C/W. This parameter guides thermal layout design - for example, doubling the copper pour area beneath the anode pad can reduce effective RθJA by up to 25 % in practice.
How is polarity identified on the 6DFN43A-M3/H package?
Polarity on the 6DFN43A-M3/H is indicated by a color band printed on the cathode end of the DFN3820A package. The opposite end - the exposed metal heatsink pad - serves as the anode terminal. This marking aligns with Vishay's mechanical drawings and is visible under standard AOI systems due to the side-wettable flank design.
What is the maximum reverse leakage current of the 6DFN43A-M3/H at its stand-off voltage?
At 25 °C and its rated stand-off voltage (VWM) of 36.8 V, the 6DFN43A-M3/H exhibits a maximum reverse leakage current (IR) of 1.0 μA. At elevated temperature (TJ = 150 °C), leakage increases to 5.0 μA - a value confirmed in the Electrical Characteristics table of Vishay document 98464 and critical for low-power sensor bias networks.
6DFN43A-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- 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/H FAQ
1.How can I place an order for 6DFN43A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN43A-M3/H 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/H reliable?
The price and inventory of 6DFN43A-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for 6DFN43A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN43A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN43A-M3/H?
6DFN43A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN43A-M3/H 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/H?
For technical support, including 6DFN43A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN43A-M3/H requirements.
6.How does Aetrix verify that 6DFN43A-M3/H is sourced from the original manufacturer or authorized distributors?
All 6DFN43A-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of 6DFN43A-M3/H?
All 6DFN43A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN43A-M3/H, 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/H part is unused and in its original packaging.
Return procedure for 6DFN43A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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