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Vishay 6DFN18A-M3/H
- Part No.:
- 6DFN18A-M3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN18A-M3/H.pdf
- Description:
- 600W,18V 5%, DFN3820A TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,479
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Product details
Overview
6DFN18A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, with 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 μs), 23.5 A peak pulse current, and 25.5 V clamping voltage at rated surge. It protects MOSFETs and signal lines in industrial sensor units against lightning-induced transients.
For engineers reviewing the 6DFN18A-M3/H datasheet, 6DFN18A-M3/H pinout, 6DFN18A-M3/H application, or 6DFN18A-M3/H equivalent, this page delivers verified electrical parameters, AOI-compatible DFN3820A package details, thermal resistance values, ESD immunity data (30 kV contact/air), and direct alternative part comparisons for circuit protection design-in.
Technical Context
This device uses passivated anisotropic rectifier technology to deliver precise unidirectional clamping with low leakage (<1.0 μA at VWM) and stable temperature coefficient (0.080 %/°C). Its junction-to-mount thermal resistance (RθJM) is 5 °C/W, enabling effective heat transfer to PCB copper pads under surge conditions.
The DFN3820A package features side-wettable flanks for automated optical inspection and complies with MSL level 1 (260 °C peak reflow). It is halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for tin whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (nom) | 18.0 V - ensures reliable conduction onset above 15.3 V operating line voltage |
| VWM | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 25.5 V - clamping voltage during 23.5 A 10/1000 μs surge, limiting downstream stress |
| PPPM | 600 W - peak transient energy handling capability per standard waveform |
| TJ max | +175 °C - supports operation in high-temperature industrial environments |
| RθJM | 5 °C/W - enables efficient thermal coupling to PCB heatsink area |
| ESD immunity | 30 kV contact/air (IEC 61000-4-2) - meets system-level EMC robustness requirements |
Pinout & Package
Package: DFN3820A - 2-terminal, leadless, side-wettable flank package (3.95 mm × 2.18 mm × 0.88 mm), matte tin-plated terminals, cathode marked by color band. Heatsink pad is anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (heatsink pad) | Current entry point during clamping | Primary thermal path to PCB copper; must be connected to large ground plane for RθJM performance |
| Cathode (marked end) | Current exit point during clamping | Connected to protected line; polarity-sensitive placement required to avoid reverse conduction failure |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100 % automated optical inspection (AOI) of solder joints without X-ray |
| Low-profile height (0.88 mm) | Supports ultra-thin consumer and portable medical device designs |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak |
| Junction passivation | Ensures <1.0 μA leakage at VWM across -65 °C to +175 °C operating range |
| SMP (DO-220AA) footprint compatibility | Facilitates drop-in replacement in existing layouts designed for larger packages |
Applications
| Industrial Sensor Signal Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Protecting 12 V CAN/LIN bus interface pins in factory-floor pressure sensors exposed to relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground. Use Value: Limits induced transients to ≤25.5 V during 23.5 A surges, preventing damage to 3.3 V microcontroller I/O buffers. |
Use Scenario: Safeguarding analog inputs of BCM microcontrollers monitoring door lock actuator feedback signals. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on 12 V supply rail feeding sensor front-end. Use Value: Maintains 15.3 V VWM margin over automotive battery ripple while clamping 600 W surges within safe IC voltage limits. |
| Medical Patient Monitor ECG Leads | Telecom Power Supply Input Stage |
Use Scenario: Shielding low-noise instrumentation amplifiers in ECG front-ends from ESD events during cable handling. IC Role / Device Role / Timing Role: First-line ESD protection on differential analog input traces before active filtering. Use Value: Withstands 30 kV IEC 61000-4-2 contact discharge without degradation, preserving sub-mV signal integrity. |
Use Scenario: Suppressing lightning-induced surges on 48 V telecom power distribution boards. IC Role / Device Role / Timing Role: Primary clamping device on DC input before DC/DC converter stage. Use Value: Delivers 600 W pulse power handling with 5 °C/W RθJM, minimizing thermal runaway risk during repeated surges. |
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 | DO-214AC package (SMA), 1.5 mm height, 400 W PPPM, 27.7 V VC @ IPPM | Larger footprint; lower power rating; less suitable for space-constrained PCBs | Select when legacy SMA layout exists and 600 W rating is not required |
| SMCJ18A | DO-214AB package (SMC), 2.6 mm height, 1500 W PPPM, 29.2 V VC @ IPPM | Higher surge capacity but 3× taller; incompatible with low-profile assemblies | Choose for higher-energy surge environments where board height allows |
Compared with SMAJ18A and SMCJ18A, the 6DFN18A-M3/H provides superior power density (600 W in 0.88 mm height), tighter VC (25.5 V vs. ≥27.7 V), and AOI-ready packaging-making it optimal for next-gen compact, automated production systems requiring MSL-1 compliance.
Availability
6DFN18A-M3/H is available at Aetrix Electronics and suitable for industrial sensor protection, automotive body control modules, and medical ECG lead interfaces requiring stable component supply, halogen-free compliance, and AEC-Q101-grade reliability.
Supply support for 6DFN18A-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, with focus on high-reliability, industry-standard solutions.
The 6DFN18A-M3/H belongs to Vishay's TRANSZORB® DFN family, engineered specifically for space-constrained, high-volume automated assembly of industrial and automotive transient protection circuits.
FAQ
What is the exact breakdown voltage tolerance for 6DFN18A-M3/H?
The 6DFN18A-M3/H has a ±5 % breakdown voltage tolerance, confirmed by its "A" suffix in the device code per Vishay's ordering nomenclature. Its VBR range is 17.1 V (min) to 18.9 V (max) at 1.0 mA test current, with 18.0 V nominal value specified at 25 °C ambient.
Is 6DFN18A-M3/H qualified to AEC-Q101?
No-6DFN18A-M3/H is not AEC-Q101 qualified. Its "H" suffix denotes tape-and-reel packaging (7-inch reel), not automotive qualification. For AEC-Q101 versions, Vishay offers separate part numbers with "-HE3" or "-HM3" suffixes; the 6DFN18A-M3/H is industrial-grade per its M3 material categorization.
What does the "M3" suffix mean in 6DFN18A-M3/H?
The "M3" suffix in 6DFN18A-M3/H indicates halogen-free, RoHS-compliant, Pb-free termination with matte tin plating, and qualification to JESD 201 Class 2 for tin whisker resistance. It also confirms industrial temperature grade (-65 °C to +175 °C).
Can 6DFN18A-M3/H replace SMAJ18A in existing designs?
6DFN18A-M3/H is not a direct footprint replacement for SMAJ18A due to different package types (DFN3820A vs. DO-214AC). While both provide 18 V clamping, the 6DFN18A-M3/H requires PCB redesign for its 3.95 mm × 2.18 mm layout and side-wettable terminations-no PCB changes are possible without revision.
What is the thermal resistance from junction to ambient (RθJA) for 6DFN18A-M3/H?
The 6DFN18A-M3/H has a typical RθJA of 140 °C/W and maximum of 175 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. This value assumes a 2 oz. copper footprint matching the DFN3820A mounting pad layout shown in the datasheet.
6DFN18A-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):
- 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
6DFN18A-M3/H FAQ
1.How can I place an order for 6DFN18A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN18A-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 6DFN18A-M3/H reliable?
The price and inventory of 6DFN18A-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 6DFN18A-M3/H is usually 5 days.
3.What payment methods are accepted for 6DFN18A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN18A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN18A-M3/H?
6DFN18A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN18A-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 6DFN18A-M3/H?
For technical support, including 6DFN18A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN18A-M3/H requirements.
6.How does Aetrix verify that 6DFN18A-M3/H is sourced from the original manufacturer or authorized distributors?
All 6DFN18A-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 6DFN18A-M3/H meets industry standards.
7.What is the process for return or replacement of 6DFN18A-M3/H?
All 6DFN18A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN18A-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 6DFN18A-M3/H part is unused and in its original packaging.
Return procedure for 6DFN18A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN18A-M3/H Tags
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