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Vishay 6DFN51CA-M3/I
- Part No.:
- 6DFN51CA-M3/I
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN51CA-M3/I.pdf
- Description:
- 600W,51V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:14,000
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Product details
Overview
6DFN51CA-M3/I from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, with 48.5 V (min) to 53.6 V (max) breakdown voltage, 43.6 V stand-off voltage, and 70.1 V clamping voltage at 8.6 A peak pulse current. It delivers 600 W peak pulse power (10/1000 μs), operates from –65 °C to +175 °C, and protects signal lines in industrial sensor interfaces.
For engineers reviewing the 6DFN51CA-M3/I datasheet, 6DFN51CA-M3/I pinout, 6DFN51CA-M3/I application, or 6DFN51CA-M3/I equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, thermal resistance (RθJA = 140–175 °C/W), bidirectional surge handling per IEC 61000-4-2 (±30 kV contact), and compatibility with AOI-enabled SMT assembly on FR4 PCBs.
Technical Context
This device uses passivated anisotropic rectifier technology to achieve low-leakage bidirectional clamping. Its junction passivation and optimized DFN3820A layout enable stable performance up to 175 °C junction temperature and support automated optical inspection via side-wettable flanks.
The 6DFN51CA-M3/I is rated for 600 W peak pulse power under 10/1000 μs waveform, with clamping voltage of 70.1 V at 8.6 A IPPM. It meets MSL Level 1 (260 °C reflow peak) and JESD 201 Class 2 whisker resistance, confirming suitability for high-reliability industrial production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - defines minimum and maximum voltage at which device enters avalanche conduction during transient events |
| VWM | 43.6 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; sets upper limit for normal circuit operation |
| VC @ IPPM | 70.1 V at 8.6 A - clamping voltage seen by protected circuit during full-rated 600 W surge; determines stress on downstream components |
| PPPM | 600 W (10/1000 μs) - peak transient energy absorption capability; used to size protection for lightning or inductive switch-off events |
| TJ max | +175 °C - maximum allowable junction temperature; enables use in high-ambient environments like motor drives or power supplies |
| ESD immunity | ±30 kV contact discharge (IEC 61000-4-2) - ensures robustness against human-body-model ESD during handling and operation |
| RθJA | 140–175 °C/W - thermal resistance from junction to ambient on standard FR4; guides PCB copper area and heatsinking requirements |
Pinout & Package
Package: DFN3820A - leadless, 2-terminal surface-mount package measuring 3.95 mm × 2.18 mm × 0.88 mm (L × W × H), with side-wettable flanks for AOI and compatible with SMP (DO-220AA) footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | No polarity marking; terminals are functionally symmetric-either terminal conducts during positive or negative transients |
| Exposed pad (no electrical connection) | Thermal interface | Non-electrical thermal slug; must be soldered to PCB copper pour to achieve specified RθJM = 5–6.5 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| Side-wettable flanks | Supports automated optical inspection (AOI) of solder joint quality on both side edges-critical for automotive and industrial SMT lines |
| Halogen-free, RoHS-compliant M3 termination | Meets JESD 201 Class 2 whisker resistance and environmental compliance for industrial-grade deployments |
| Low-profile height (0.88 mm) | Enables use in space-constrained modules such as portable medical sensors or stacked PCB assemblies |
| MSL Level 1 rating | Allows unlimited floor life and supports standard 260 °C Pb-free reflow without baking or special handling |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Signal Lines |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from load dump and relay coil flyback in factory automation PLCs. IC Role / Device Role: Bidirectional TVS placed across signal line and ground to clamp ±1 kV transients before reaching ADC or op-amp input. Use Value: Clamping at 70.1 V ensures protected 24 V system ICs remain below their 75 V absolute maximum rating during 600 W surges. | Use Scenario: Shielding LIN bus or PWM-controlled actuator signals in BCMs from battery transients and ESD events. IC Role / Device Role: Transient suppressor mounted directly at connector entry point to absorb IEC 61000-4-2 ±30 kV discharges and ISO 7637-2 pulse 1/2a. Use Value: Low 0.88 mm profile allows placement in tight connector zones; M3 termination ensures long-term reliability under thermal cycling. |
| Medical Patient Monitoring Front-End | Telecom Base Station Data Line Protection |
Use Scenario: Safeguarding isolated SPI or I²C lines between microcontroller and analog front-end in portable ECG units. IC Role / Device Role: Low-capacitance bidirectional TVS suppressing ESD and coupling noise while preserving signal integrity up to 1 MHz. Use Value: Junction capacitance <100 pF (typ.) minimizes signal distortion; 175 °C TJ max supports sterilization cycle thermal margins. | Use Scenario: Protecting RS-485 or Ethernet PHY data lines in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role: Primary-level TVS on differential pair, coordinated with secondary GDT or MOV for staged surge handling. Use Value: 600 W PPPM rating handles partial lightning energy; DFN3820A footprint enables dense layout near connectors without increasing board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | DO-214AC (SMA) package; higher RθJA (~110 °C/W); 70.1 V VC at 8.5 A; same VBR/VWM range | Requires larger PCB area; less suitable for AOI or ultra-thin designs; better for manual repair or high-power discrete layouts | Select SMAJ51CA when board space permits and legacy through-hole or larger SMT assembly is used. |
| SMCJ51CA | DO-214AB (SMC) package; 600 W rating; VC = 82.4 V at 7.3 A; higher clamping voltage; RθJA ~50 °C/W | Higher thermal mass suits higher average power dissipation but increases clamping overshoot risk for fast transients | Choose SMCJ51CA where sustained surge repetition or elevated ambient temperatures demand lower thermal resistance over tighter clamping. |
Compared with SMAJ51CA and SMCJ51CA, the 6DFN51CA-M3/I offers superior board-area efficiency and AOI compatibility in compact industrial and medical systems, trading slightly higher clamping impedance for significantly reduced footprint and automated manufacturability.
Availability
6DFN51CA-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and medical patient monitoring equipment requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow readiness.
Supply support for 6DFN51CA-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, power efficiency, and application-specific optimization.
The 6DFN51CA-M3/I belongs to Vishay's TRANSZORB® DFN series-designed specifically for high-density, AOI-compatible transient suppression in space- and reliability-constrained industrial, medical, and telecom systems.
FAQ
What is the breakdown voltage tolerance of the 6DFN51CA-M3/I?
The 6DFN51CA-M3/I has a breakdown voltage (VBR) tolerance of ±5 %, specified as 48.5 V (min) to 53.6 V (max) at 1.0 mA test current. This tight tolerance ensures predictable turn-on behavior during transient events and simplifies margining against protected IC voltage rails. The "CA" suffix in the part number explicitly denotes this ±5 % bidirectional tolerance band.
Does the 6DFN51CA-M3/I require a specific PCB pad layout for thermal performance?
Yes-the 6DFN51CA-M3/I's exposed thermal pad must be soldered to a minimum 25 mm² copper pour on the PCB to achieve the specified RθJM of 5–6.5 °C/W. The datasheet provides exact mounting pad dimensions (3.75 mm × 2.18 mm) and recommends 4–6 thermal vias (0.3 mm diameter) beneath the pad to inner ground layers. Omitting this compromises surge derating above 25 °C ambient.
Is the 6DFN51CA-M3/I suitable for IEC 61000-4-2 ESD protection?
Yes-the 6DFN51CA-M3/I is rated for ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2, verified in production testing. Its low clamping voltage (70.1 V) and sub-100 pF junction capacitance make it effective for protecting high-speed digital and analog signal lines without signal degradation. It is commonly deployed at board edges and connector interfaces.
What does the "M3/I" suffix mean in 6DFN51CA-M3/I?
The "M3" suffix indicates halogen-free, RoHS-compliant construction with matte tin-plated terminations that meet JESD 201 Class 2 whisker resistance. The "I" denotes packaging in 13-inch tape-and-reel format with 14,000 units per reel-optimized for high-volume SMT placement. This differs from "H" (AEC-Q101 qualified) and "/H" (7-inch reel).
How does the 6DFN51CA-M3/I compare to older SMA/SMB packaged TVS diodes in surge handling?
The 6DFN51CA-M3/I matches the 600 W peak pulse power (10/1000 μs) of SMAJ51CA and SMBJ51CA but achieves it in a 60 % smaller footprint and 55 % lower profile (0.88 mm vs. 2.3 mm). Its DFN3820A package also enables side-wettable flanks for AOI-unavailable in SMA/SMB-while maintaining identical VBR, VWM, and VC specs. Thermal resistance is higher (140–175 °C/W vs. ~110 °C/W for SMA), requiring careful PCB copper design.
6DFN51CA-M3/I 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/I FAQ
1.How can I place an order for 6DFN51CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN51CA-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 6DFN51CA-M3/I reliable?
The price and inventory of 6DFN51CA-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 6DFN51CA-M3/I is usually 5 days.
3.What payment methods are accepted for 6DFN51CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN51CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN51CA-M3/I?
6DFN51CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN51CA-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 6DFN51CA-M3/I?
For technical support, including 6DFN51CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN51CA-M3/I requirements.
6.How does Aetrix verify that 6DFN51CA-M3/I is sourced from the original manufacturer or authorized distributors?
All 6DFN51CA-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 6DFN51CA-M3/I meets industry standards.
7.What is the process for return or replacement of 6DFN51CA-M3/I?
All 6DFN51CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN51CA-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 6DFN51CA-M3/I part is unused and in its original packaging.
Return procedure for 6DFN51CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN51CA-M3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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