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Vishay 6DFN51CA-M3/H
- Part No.:
- 6DFN51CA-M3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN51CA-M3/H.pdf
- Description:
- 600W,51V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,690
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Product details
Overview
6DFN51CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, featuring 51 V nominal breakdown voltage (±5 %), 43.6 V stand-off voltage, 70.1 V maximum clamping voltage at 8.6 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It protects MOSFETs and signal lines in industrial sensor units against lightning-induced transients.
For engineers reviewing the 6DFN51CA-M3/H datasheet, 6DFN51CA-M3/H pinout, 6DFN51CA-M3/H application, or 6DFN51CA-M3/H equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, thermal resistance (RθJA = 140–175 °C/W), bidirectional surge capability, AOI-compatible side-wettable flanks, and AEC-Q101 qualification indicated by /H suffix.
Technical Context
This device uses passivated anisotropic rectifier technology to achieve low-leakage bidirectional clamping with 1.0 μA max reverse leakage at VWM and 6.0 μA at 150 °C. Its junction-to-mount thermal resistance (RθJM = 5–6.5 °C/W) enables effective heat transfer to PCB copper pads under repetitive surge conditions.
The DFN3820A package integrates side-wettable flanks for automated optical inspection and supports reflow profiles up to 260 °C (MSL Level 1). It delivers 30 kV ESD immunity per IEC 61000-4-2 (contact/air discharge), meeting requirements for rugged industrial and automotive-grade signal line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V (min–max at 1 mA); ensures reliable turn-on before protected circuit exceeds safe overvoltage threshold |
| Stand-off Voltage VWM | 43.6 V; maximum continuous working voltage without significant leakage-must exceed system operating voltage |
| Clamping Voltage VC | 70.1 V at 8.6 A (10/1000 μs); defines worst-case voltage seen by downstream IC during surge event |
| Peak Pulse Power | 600 W (10/1000 μs); determines energy-handling capacity for lightning and inductive-switching transients |
| Junction Temperature Range | –65 °C to +175 °C; supports operation in harsh environments including under-hood automotive and industrial enclosures |
| ESD Immunity | 30 kV contact/air (IEC 61000-4-2); provides robust protection against human-body-model and system-level ESD events |
| Package | DFN3820A (3.95 mm × 2.18 mm × 0.88 mm); low-profile, leadless, side-wettable for AOI and high-density PCB layouts |
Pinout & Package
DFN3820A is a 2-terminal, bidirectional package with no polarity marking. Terminals are matte tin-plated and solderable per J-STD-002/JESD 22-B102. Mounting pad layout follows JEDEC MO-229 specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity-no orientation required during placement |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; both terminals connect to protected line and ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Side-Wettable Flanks | Supports automated optical inspection (AOI) of solder joints-critical for high-reliability manufacturing traceability |
| AEC-Q101 Qualified (/H suffix) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-Free & RoHS | M3 termination meets environmental compliance requirements for industrial and consumer end equipment |
| Low Profile (0.88 mm height) | Enables use in space-constrained modules such as wearable sensors and compact IoT edge nodes |
Applications
| Industrial Sensor Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure/temperature sensors exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across signal and return path, clamping fast-rising inductive spikes before they reach ADC input or op-amp buffer. Use Value: Prevents latch-up or permanent damage to precision signal conditioning ICs while maintaining <1.0 μA leakage at 24 V DC supply. |
Use Scenario: Shielding LIN bus transceiver I/O pins in door module ECUs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS shunting surge energy between LIN data line and chassis ground during ISO 7637-2 pulse 1/2a/5a events. Use Value: Maintains signal integrity below 70.1 V clamping limit during 8.6 A peak pulses, ensuring transceiver remains functional post-surge. |
| Medical Imaging Interface | Telecom Base Station RF Front-End |
|
Use Scenario: Safeguarding differential LVDS clock inputs to FPGA-based image processing boards in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed across differential pair to suppress ESD without distorting 100+ MHz clock edges. Use Value: Delivers 30 kV IEC 61000-4-2 ESD protection while adding <0.15 dB insertion loss at 100 MHz-preserving timing jitter performance. |
Use Scenario: Protecting bias feed lines and control signals feeding GaN power amplifiers in 5G macro base station RF cards. IC Role / Device Role / Timing Role: High-energy TVS absorbing 600 W surges induced by antenna lightning coupling or power rail instability. Use Value: Sustains 175 °C junction temperature rating during repeated surges, enabling uninterrupted operation in outdoor telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/5A (Vishay) | DO-214AC package; higher RθJA (150 °C/W); 51 V unidirectional; 600 W rating | Requires polarity-aware layout; less suitable for AC or floating lines; larger footprint (4.5 × 2.7 mm) | Select when board space allows larger package and unidirectional protection suffices with explicit ground referencing. |
| SMCJ51A (Littelfuse) | DO-214AB package; 51 V unidirectional; 1500 W rating; higher clamping (83.3 V at 18.2 A) | Higher power handling but larger size (7.11 × 6.22 mm); not AEC-Q101 qualified; lacks side-wettable flanks | Choose only if surge energy exceeds 600 W and AOI is not required; avoid in automotive or high-density designs. |
Compared with SMAJ51A-E3/5A and SMCJ51A, the 6DFN51CA-M3/H offers bidirectional operation in a 3.95 mm × 2.18 mm footprint with AEC-Q101 qualification and AOI support-making it optimal for space-constrained, automotive-grade, and floating-signal applications where polarity independence is essential.
Availability
6DFN51CA-M3/H is available at Aetrix Electronics and suitable for industrial sensor protection, automotive body control modules, and medical imaging interface designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant transient suppression.
Supply support for 6DFN51CA-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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 6DFNxxCA series was designed specifically for high-density, AOI-compatible transient suppression in automotive, industrial, and medical systems-leveraging DFN3820A's thermal and manufacturability advantages over legacy SMB/SMA packages.
FAQ
What does the /H suffix indicate in 6DFN51CA-M3/H?
The /H suffix in 6DFN51CA-M3/H denotes AEC-Q101 qualification, confirming that the device has passed stress testing for automotive applications including temperature cycling, humidity bias, and mechanical shock. This makes 6DFN51CA-M3/H suitable for under-hood and body electronics where reliability under thermal and vibration stress is critical. The full part number 6DFN51CA-M3/H must be specified to ensure receipt of the qualified variant.
Is 6DFN51CA-M3/H unidirectional or bidirectional?
6DFN51CA-M3/H is a bidirectional transient voltage suppressor, as confirmed by its "CA" designation (per Vishay's ordering nomenclature) and absence of cathode band marking. It clamps positive and negative transients equally across both terminals, making it ideal for protecting AC-coupled lines, differential buses, or floating references without polarity concerns. This behavior is verified in the electrical characteristics table showing symmetric VBR min/max limits.
What is the maximum clamping voltage for 6DFN51CA-M3/H at rated surge current?
The maximum clamping voltage for 6DFN51CA-M3/H is 70.1 V at 8.6 A peak pulse current (10/1000 μs waveform), as specified in the Electrical Characteristics table. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and must be compared against the absolute maximum ratings of downstream ICs to ensure safe operation.
Does 6DFN51CA-M3/H require special PCB layout considerations?
Yes-6DFN51CA-M3/H requires adherence to the DFN3820A mounting pad layout shown in the package outline drawing, including thermal pad exposure and solder mask defined lands. To maximize thermal dissipation, the PCB should incorporate ≥2 oz. copper on the mounting layer and at least two thermal vias per pad. Avoid soldermask over the side-wettable flanks to enable AOI verification of solder fillet formation.
How does the M3 suffix affect the material composition of 6DFN51CA-M3/H?
The M3 suffix in 6DFN51CA-M3/H indicates halogen-free, RoHS-compliant construction with matte tin-plated terminations that meet JESD 201 Class 2 whisker resistance requirements. This ensures compatibility with lead-free reflow processes and long-term reliability in humid or thermally cycled environments-key for industrial and medical deployments where material compliance is audited.
6DFN51CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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
6DFN51CA-M3/H FAQ
1.How can I place an order for 6DFN51CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN51CA-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 6DFN51CA-M3/H reliable?
The price and inventory of 6DFN51CA-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 6DFN51CA-M3/H is usually 5 days.
3.What payment methods are accepted for 6DFN51CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN51CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN51CA-M3/H?
6DFN51CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN51CA-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 6DFN51CA-M3/H?
For technical support, including 6DFN51CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN51CA-M3/H requirements.
6.How does Aetrix verify that 6DFN51CA-M3/H is sourced from the original manufacturer or authorized distributors?
All 6DFN51CA-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 6DFN51CA-M3/H meets industry standards.
7.What is the process for return or replacement of 6DFN51CA-M3/H?
All 6DFN51CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN51CA-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 6DFN51CA-M3/H part is unused and in its original packaging.
Return procedure for 6DFN51CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN51CA-M3/H Tags
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