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Vishay General Semiconductor - Diodes Division 6DFN18A-M3/I
- Part No.:
- 6DFN18A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN18A-M3/I.pdf
- Description:
- 600W,18V 5%, DFN3820A TVS
- Quantity:
- Payment:
- Shipping:
Inventory:14,000
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Product details
Overview
6DFN18A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, featuring 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 maximum clamping voltage (VC). It protects MOSFETs and ICs in industrial sensor signal lines against lightning-induced transients.
For engineers reviewing the 6DFN18A-M3/I datasheet, 6DFN18A-M3/I pinout, 6DFN18A-M3/I application, or 6DFN18A-M3/I equivalent, this page delivers verified electrical parameters, AOI-compatible DFN3820A package details, thermal resistance values, ESD immunity data (30 kV contact/air), and real-world protection use cases for consumer, medical, and telecom electronics.
Technical Context
This device employs 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 5–6.5 °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 supports reflow soldering up to 260 °C (MSL Level 1). Polarity is marked by a cathode band; the heatsink pad serves as the anode terminal, ensuring consistent thermal and electrical grounding in layout design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 18.0 V - Ensures reliable triggering above circuit operating voltage while avoiding false clamping during normal operation |
| VWM | 15.3 V - Maximum continuous reverse voltage before leakage exceeds 1.0 μA, matching typical 12–15 V supply rails |
| VC @ IPPM | 25.5 V - Clamps transient spikes to safe levels for downstream 3.3 V or 5 V logic interfaces |
| PPPM | 600 W (10/1000 μs) - Handles high-energy surges common in industrial inductive load switching |
| TJ max | +175 °C - Supports operation in harsh environments including automotive under-hood and industrial motor control |
| ESD Immunity | 30 kV contact/air per IEC 61000-4-2 - Provides robust pre-compliance protection without external shielding |
| RθJM | 5 °C/W (typ.) - Enables efficient thermal coupling to PCB ground plane for sustained surge handling |
Pinout & Package
Package: DFN3820A - 2-terminal, leadless, low-profile (0.88 mm typical height) surface-mount package with side-wettable flanks for AOI and compatible with SMP (DO-220AA) footprint standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Pad) | Common cathode return path and thermal interface | Must be connected to large copper pour for thermal dissipation and low-impedance ground reference |
| Cathode (Marked Terminal) | Transient current sink during overvoltage events | Connected to protected line (e.g., sensor output or MOSFET gate); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100 % automated optical inspection of solder joint integrity without X-ray |
| Halogen-free, RoHS-compliant M3 termination | Meets JESD 201 Class 2 whisker resistance and global environmental compliance requirements |
| Low-profile DFN3820A package | 0.88 mm height enables use in space-constrained portable and wearable electronics |
| Optimized junction passivation | Reduces leakage drift over temperature and extends lifetime in high-humidity environments |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing without dry-pack requirements |
Applications
| Industrial Sensor Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to relay coil flyback in factory automation panels. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and microcontroller ADC input. Use Value: Limits induced transients to ≤25.5 V, preventing ADC saturation and latch-up in 3.3 V microcontrollers. | Use Scenario: Safeguarding LIN bus transceiver I/O pins from load dump and alternator ripple in door module ECUs. IC Role / Device Role / Timing Role: Standoff-clamp TVS on LIN data line, referenced to chassis ground via heatsink pad. Use Value: Withstands 600 W surges while maintaining <1.0 μA leakage at 12 V system voltage, preserving bus signal integrity. |
| Medical Imaging Signal Chain | Telecom Power Interface |
Use Scenario: Shielding low-noise amplifier inputs in ultrasound front-end modules from ESD events during probe handling. IC Role / Device Role / Timing Role: First-line ESD clamp on differential analog signal path prior to instrumentation amplifier. Use Value: 30 kV IEC 61000-4-2 immunity prevents damage without adding capacitance that degrades bandwidth. | Use Scenario: Protecting PoE-powered Ethernet PHY power rails (3.3 V/5 V) from surge coupling through magnetics. IC Role / Device Role / Timing Role: Secondary-level TVS on DC-DC converter input, coordinated with primary MOV protection. Use Value: Fast response and 25.5 V clamping prevent overvoltage shutdown of isolated DC-DC controllers during lightning surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | DO-214AC package, higher RθJA (110 °C/W), 20.0 V VBR min, same PPPM | Requires larger board area and lacks side-wettable flanks for AOI | Preferred where legacy through-hole or larger SMT footprints exist and AOI is not required |
| SMCJ18A | DO-214AB package, 1000 W PPPM, 20.0 V VBR min, higher VC (29.2 V) | Higher clamping voltage may exceed downstream IC absolute max ratings | Chosen when higher surge energy tolerance is needed and board space allows larger case outline |
Compared with SMAJ18A and SMCJ18A, the 6DFN18A-M3/I offers superior thermal performance (RθJM = 5 °C/W), smaller footprint (3.95 × 2.18 mm), and AOI-ready construction-making it optimal for high-density, automated production of compact industrial and medical devices.
Availability
6DFN18A-M3/I is available at Aetrix Electronics and suitable for industrial sensor protection, automotive body electronics, and medical imaging signal chain designs requiring stable component supply, halogen-free compliance, and MSL Level 1 manufacturability.
Supply support for 6DFN18A-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 6DFN18A-M3/I belongs to Vishay's TRANSZORB® DFN series, engineered specifically for high-density, AOI-compatible transient suppression in space-constrained industrial, medical, and automotive electronics.
FAQ
What is the exact breakdown voltage range for 6DFN18A-M3/I?
The 6DFN18A-M3/I has a guaranteed breakdown voltage (VBR) range of 17.1 V (min) to 18.9 V (max) at 1.0 mA test current, with 18.0 V nominal. This tight ±5 % tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting sensitive 3.3 V or 5 V logic interfaces without premature conduction.
Does 6DFN18A-M3/I support automated optical inspection (AOI)?
Yes, the 6DFN18A-M3/I uses a DFN3820A package with side-wettable flanks explicitly designed for full-cycle AOI. The exposed copper sidewalls allow machine vision systems to verify solder fillet formation and coplanarity without requiring X-ray inspection-reducing manufacturing cost and increasing yield in high-volume SMT lines.
What is the maximum clamping voltage of 6DFN18A-M3/I under surge conditions?
The 6DFN18A-M3/I exhibits a maximum clamping voltage (VC) of 25.5 V at its rated peak pulse current (IPPM = 23.5 A) under 10/1000 μs waveform. This value is measured and guaranteed per Vishay Document Number 98464, ensuring downstream components see no more than 25.5 V during worst-case transient events.
Is 6DFN18A-M3/I compliant with RoHS and halogen-free standards?
Yes, the "M3" suffix in 6DFN18A-M3/I confirms halogen-free, RoHS-compliant construction with matte tin-plated terminals meeting J-STD-002 and JESD 22-B102 solderability standards. It also passes JESD 201 Class 2 whisker testing, making it suitable for long-life industrial and medical applications.
What is the thermal resistance from junction to mount (RθJM) for 6DFN18A-M3/I?
The 6DFN18A-M3/I has a typical junction-to-mount thermal resistance (RθJM) of 5 °C/W, with a maximum of 6.5 °C/W per JEDEC® 51-14 TDIM testing. This low value reflects efficient heat transfer from the silicon die directly into the PCB copper pad via the exposed anode heatsink, supporting repeated surge events without thermal runaway.
6DFN18A-M3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- 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/I FAQ
1.How can I place an order for 6DFN18A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN18A-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 6DFN18A-M3/I reliable?
The price and inventory of 6DFN18A-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 6DFN18A-M3/I is usually 5 days.
3.What payment methods are accepted for 6DFN18A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN18A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN18A-M3/I?
6DFN18A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN18A-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 6DFN18A-M3/I?
For technical support, including 6DFN18A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN18A-M3/I requirements.
6.How does Aetrix verify that 6DFN18A-M3/I is sourced from the original manufacturer or authorized distributors?
All 6DFN18A-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 6DFN18A-M3/I meets industry standards.
7.What is the process for return or replacement of 6DFN18A-M3/I?
All 6DFN18A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN18A-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 6DFN18A-M3/I part is unused and in its original packaging.
Return procedure for 6DFN18A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN18A-M3/I Tags
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