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Vishay 6DFN18CA-M3/H
- Part No.:
- 6DFN18CA-M3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN18CA-M3/H.pdf
- Description:
- 600W,18V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,998
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Product details
Overview
6DFN18CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, with 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 25.5 V maximum clamping voltage at 23.5 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs). It protects signal lines in sensor units and MOSFET gate drivers against lightning-induced transients and inductive switching surges.
For engineers reviewing the 6DFN18CA-M3/H datasheet, 6DFN18CA-M3/H pinout, 6DFN18CA-M3/H application, or 6DFN18CA-M3/H equivalent, key selection criteria include clamping voltage vs. surge current performance, DFN3820A side-wettable flanks for AOI compatibility, M3 halogen-free RoHS-compliant termination, and bidirectional operation without polarity marking.
Technical Context
This TVS diode uses anisotropic rectifier technology with junction passivation optimized for low-leakage, high-reliability transient suppression. Its bidirectional configuration enables symmetrical clamping on AC or differential signal paths without requiring orientation during placement.
The DFN3820A package delivers thermal resistance of 140–175 °C/W (junction-to-ambient) and 5–6.5 °C/W (junction-to-mount), supporting operation up to +175 °C junction temperature while maintaining stable clamping under repetitive surge conditions per JEDEC 51-2A and 51-14 test methods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - Ensures reliable conduction onset above 15.3 V operating voltage, preventing false triggering during normal signal swings. |
| VWM | 15.3 V - Maximum continuous reverse voltage before leakage exceeds 1.0 μA, compatible with 15 V logic and analog interfaces. |
| VC @ IPPM | 25.5 V - Clamps 10/1000 μs surges up to 23.5 A, limiting downstream voltage stress to safe levels for 24 V-rated ICs. |
| PPPM | 600 W - Sustains single-event transients typical of IEC 61000-4-5 Level 3 (1 kV line-to-line) without degradation. |
| IPPM | 23.5 A - Peak surge current handling capacity derived from 10/1000 μs waveform, validated per fig. 3 in datasheet 98490. |
| Junction Temp Range | –65 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and medical power supplies. |
| ESD Immunity | ±30 kV contact/air discharge per IEC 61000-4-2 - Protects human-interface ports and exposed connectors against static events. |
Pinout & Package
Package: DFN3820A - 2-terminal, leadless, side-wettable flanks, 3.95 mm × 2.18 mm × 0.88 mm (L × W × H), no cathode band (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Pin 1 & 2) | Bidirectional transient path | Interchangeable terminals; symmetric conduction allows placement without orientation check, simplifying automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100 % automated optical inspection (AOI) of solder joints on both package edges, eliminating X-ray requirement for process validation. |
| MSL Level 1 rating | Allows unlimited floor life at ≤30 °C/60 % RH, eliminating bake requirements prior to reflow - reduces manufacturing overhead. |
| M3 termination | Matte tin plating compliant with JESD 201 Class 2 whisker resistance and J-STD-002/JESD 22-B102 solderability standards. |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures, satisfying safety requirements for medical and industrial end equipment. |
| Low-profile height (0.88 mm) | Supports ultra-thin PCB designs in space-constrained applications such as portable diagnostic sensors and wearable electronics. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load-dump and jump-start induced transients in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional clamping device placed directly at connector entry point, shunting surge energy before it reaches PHY layer. Use Value: Clamps 23.5 A surges to ≤25.5 V, preserving transceiver integrity under ISO 7637-2 Pulse 5a (12 V system) stress conditions. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring faults and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact inputs, operating in parallel with optocoupler input stage. Use Value: Limits transient voltage to 25.5 V within 10 ns response time, preventing latch-up in upstream Schmitt-trigger comparators. |
| Medical Imaging Signal Lines | Telecom Power Supply Monitoring |
Use Scenario: Shielding analog front-end amplifiers in ultrasound probe cables from ESD and cable-discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) TVS placed adjacent to ADC input pins to minimize signal distortion. Use Value: Delivers 30 kV IEC 61000-4-2 ESD protection without degrading 10 MHz bandwidth of differential sensor signals. |
Use Scenario: Protecting voltage-monitoring ICs on telecom DC-DC converter outputs against output capacitor failure-induced overshoot. IC Role / Device Role / Timing Role: Secondary clamping element downstream of primary OVP circuit, acting as last-line defense. Use Value: Absorbs 600 W surges up to 175 °C junction temperature, maintaining functionality during extended overvoltage fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5A | DO-214AC (SMA) package, 18 V unidirectional, 400 W PPPM, higher VC = 29.2 V @ 12.1 A | Requires polarity-aware placement; less suitable for differential or AC-coupled lines | Select when legacy SMA footprint exists and unidirectional clamping suffices for DC-biased rails. |
| SMCJ18CA | DO-214AB (SMC) package, 18 V bidirectional, 1500 W PPPM, larger 7.11 mm × 6.22 mm footprint | Higher surge margin but incompatible with fine-pitch DFN layouts and AOI workflows | Choose for high-energy industrial surge environments where board space permits and visual inspection is not required. |
Compared with SMAJ18A-E3/5A and SMCJ18CA, the 6DFN18CA-M3/H provides optimal balance of compact DFN3820A packaging, bidirectional symmetry, AOI-ready terminations, and precise 25.5 V clamping-making it ideal for next-generation space- and reliability-constrained designs.
Availability
6DFN18CA-M3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O protection, and medical imaging signal lines requiring stable component supply, consistent M3 termination compliance, and full traceability across production lots.
Supply support for 6DFN18CA-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 TVS devices, with emphasis on reliability, precision, and application-specific optimization.
The 6DFN18CA-M3/H belongs to Vishay's TRANSZORB® DFN family, engineered specifically for high-density, AOI-compatible transient suppression in automotive, industrial, and medical systems demanding MSL Level 1, halogen-free, and AEC-Q101-aligned construction.
FAQ
What is the clamping voltage of the 6DFN18CA-M3/H at its rated peak pulse current?
The 6DFN18CA-M3/H has a maximum clamping voltage (VC) of 25.5 V at its rated peak pulse current (IPPM) of 23.5 A under a 10/1000 μs waveform. This value is measured per Figure 3 in Vishay document 98490 and ensures downstream components see limited overvoltage during surge events. The 6DFN18CA-M3/H maintains this clamping performance across its full operating temperature range.
Is the 6DFN18CA-M3/H suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the "H" suffix in 6DFN18CA-M3/H denotes AEC-Q101 qualification per the Vishay ordering information table. The 6DFN18CA-M3/H meets stress testing requirements for temperature cycling, humidity bias, and mechanical shock, making it appropriate for under-hood and cabin automotive modules. Full qualification data is documented in Vishay's AEC-Q101 reports.
Does the 6DFN18CA-M3/H require orientation during PCB placement?
No - the 6DFN18CA-M3/H is a bidirectional TVS with no cathode marking or polarity dependence. Its DFN3820A package has identical terminals, allowing unrestricted placement during automated pick-and-place. This eliminates orientation verification steps and reduces SMT line programming complexity for the 6DFN18CA-M3/H.
What is the thermal resistance of the 6DFN18CA-M3/H, and how does it affect layout design?
The 6DFN18CA-M3/H exhibits RθJA of 140–175 °C/W and RθJM of 5–6.5 °C/W per JEDEC 51-2A and 51-14 standards. To maximize thermal performance, use ≥20 mm² copper pad area with ≥4 thermal vias (0.3 mm diameter) connecting to inner ground planes. This thermal strategy ensures the 6DFN18CA-M3/H sustains repeated surges without exceeding 175 °C junction temperature.
How does the side-wettable flank design of the 6DFN18CA-M3/H improve manufacturing yield?
The side-wettable flanks on the 6DFN18CA-M3/H enable full-surface solder joint inspection using standard AOI systems - detecting voids, insufficient fillet, or bridging without requiring X-ray. This capability increases first-pass yield in high-volume production and reduces rework cost. The 6DFN18CA-M3/H's flanks are specified per IPC-J-STD-020 and validated in Vishay's MSL Level 1 qualification.
6DFN18CA-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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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
6DFN18CA-M3/H FAQ
1.How can I place an order for 6DFN18CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN18CA-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 6DFN18CA-M3/H reliable?
The price and inventory of 6DFN18CA-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 6DFN18CA-M3/H is usually 5 days.
3.What payment methods are accepted for 6DFN18CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN18CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN18CA-M3/H?
6DFN18CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN18CA-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 6DFN18CA-M3/H?
For technical support, including 6DFN18CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN18CA-M3/H requirements.
6.How does Aetrix verify that 6DFN18CA-M3/H is sourced from the original manufacturer or authorized distributors?
All 6DFN18CA-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 6DFN18CA-M3/H meets industry standards.
7.What is the process for return or replacement of 6DFN18CA-M3/H?
All 6DFN18CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN18CA-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 6DFN18CA-M3/H part is unused and in its original packaging.
Return procedure for 6DFN18CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN18CA-M3/H Tags
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