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Vishay 6DFN18CA-M3/I
- Part No.:
- 6DFN18CA-M3/I
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN18CA-M3/I.pdf
- Description:
- 600W,18V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:13,990
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Product details
Overview
6DFN18CA-M3/I 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), 600 W peak pulse power (10/1000 μs), and 23.5 A peak pulse current (IPPM). It protects sensitive ICs and MOSFETs in consumer and industrial electronics against lightning-induced surges and inductive switching transients.
For engineers reviewing the 6DFN18CA-M3/I datasheet, 6DFN18CA-M3/I pinout, 6DFN18CA-M3/I application, or 6DFN18CA-M3/I equivalent, key selection criteria include clamping voltage (25.5 V at IPPM), low-profile DFN3820A footprint with side-wettable flanks for AOI, bidirectional polarity, and M3-grade halogen-free/RoHS-compliant construction suitable for high-reliability automated assembly.
Technical Context
This device implements an anisotropic rectifier technology with junction passivation optimized for fast response to transient overvoltages. Its single-channel, bidirectional configuration enables symmetrical clamping without polarity constraints, supporting protection of AC-coupled or differential signal lines.
Thermal design is enabled by RθJM = 5 °C/W (typ.) to mounting pad and RθJA = 140 °C/W (typ.) on FR4, allowing sustained operation up to TJ = 175 °C. ESD immunity meets IEC 61000-4-2 at ±30 kV (contact/air).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable conduction onset above system operating voltage while avoiding false triggering |
| VWM | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA, matching 15 V rail systems |
| VC @ IPPM | 25.5 V - clamped voltage during 23.5 A surge, limiting stress on downstream 3.3 V/5 V logic interfaces |
| PPPM | 600 W (10/1000 μs) - handles standard lightning surge waveforms per IEC 61000-4-5 |
| IPPM | 23.5 A - peak surge current capability compatible with 24 V industrial control bus transients |
| TJ max | +175 °C - supports operation in under-hood automotive modules and sealed industrial enclosures |
| Package | DFN3820A - 3.95 mm × 2.18 mm × 0.88 mm low-profile leadless package with side-wettable flanks for AOI |
Pinout & Package
DFN3820A package: 2-terminal, bidirectional device with no cathode marking; terminals are symmetric and interchangeable. Dimensions: 3.95 mm × 2.18 mm × 0.88 mm (L × W × H), 0.70 mm terminal width, side-wettable flanks for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Interchangeable connection point; functions as either anode or cathode depending on transient polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Interchangeable connection point; completes symmetrical clamping path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals or differential pairs without polarity alignment during layout |
| Side-wettable flanks | Supports automated optical inspection (AOI) of solder joints on both top and side surfaces |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Halogen-free & RoHS | M3 suffix confirms compliance with environmental regulations and whisker resistance (JESD 201 Class 2) |
| Low profile (0.88 mm) | Reduces board height in space-constrained applications such as portable medical sensors and IoT edge nodes |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against back-EMF spikes from brushed DC motors in PLC I/O modules. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly across motor driver output traces. Use Value: Clamps 25.5 V at 23.5 A, preventing latch-up in 3.3 V MCU GPIOs while maintaining <1.0 μA leakage at 15.3 V standby. | Use Scenario: Surge suppression on LIN bus lines in door module ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Bidirectional TVS shunting transients between LIN+ and LIN− lines. Use Value: Withstands 30 kV ESD per IEC 61000-4-2 and clamps within safe margin of LIN physical layer's ±40 V tolerance. |
| Consumer Power Adapters | Medical Sensor Interfaces |
Use Scenario: Input-stage protection for USB-C PD controllers against AC line surges coupled through Y-capacitors. IC Role / Device Role / Timing Role: Primary-side TVS on VBUS line upstream of buck controller. Use Value: 600 W peak power rating absorbs 10/1000 μs surges without degradation; 0.88 mm height avoids interference with heatsink placement. | Use Scenario: ESD hardening of analog front-end inputs in wearable ECG monitors connected to dry electrodes. IC Role / Device Role / Timing Role: Signal-line TVS on differential biopotential amplifier inputs. Use Value: Low 1.0 μA leakage at 15.3 V preserves input bias stability; bidirectional symmetry avoids signal inversion in AC-coupled paths. |
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-E3/57T | DO-214AC (SMA) package, 18 V unidirectional, 400 W PPPM, higher VC = 29.2 V | Requires external polarity management; larger footprint (4.5 mm × 2.7 mm) limits high-density layouts | Select when legacy SMA footprint compatibility is required and bidirectionality is not needed |
| SMCJ18CA | DO-214AB (SMC) package, 18 V bidirectional, 1500 W PPPM, VC = 29.2 V, 3.5× taller (2.6 mm) | Higher surge capacity but incompatible with ultra-thin designs; unsuitable for AOI due to non-wettable leads | Select only for high-energy surge environments where 600 W is insufficient and board height >2.5 mm is acceptable |
Compared with SMAJ18A-E3/57T and SMCJ18CA, the 6DFN18CA-M3/I delivers superior board-area efficiency, AOI support, and tighter clamping (25.5 V vs. ≥29.2 V), making it optimal for modern compact, automated production of industrial and medical electronics where precise voltage limiting and process reliability are critical.
Availability
6DFN18CA-M3/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, consumer power adapters, and medical sensor interfaces requiring stable component supply, consistent M3-grade material compliance, and full traceability across production lots.
Supply support for 6DFN18CA-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, TVS devices, and optoelectronics with emphasis on high-reliability, high-efficiency power solutions.
The 6DFNxxCA series was developed to deliver high-power transient suppression in ultra-low-profile DFN packages for next-generation compact electronics, targeting applications demanding AOI compatibility, halogen-free materials, and extended temperature operation.
FAQ
What is the clamping voltage of the 6DFN18CA-M3/I at its rated peak pulse current?
The 6DFN18CA-M3/I has a maximum clamping voltage (VC) of 25.5 V when subjected to its rated peak pulse current (IPPM) of 23.5 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. The 6DFN18CA-M3/I maintains this clamping performance across its full operating temperature range.
Is the 6DFN18CA-M3/I suitable for automated optical inspection (AOI) in SMT lines?
Yes, the 6DFN18CA-M3/I uses a DFN3820A package with side-wettable flanks specifically designed for AOI compatibility. Its matte tin-plated terminals and controlled solder fillet geometry enable reliable solder-joint inspection from the side view, eliminating manual visual checks. The 6DFN18CA-M3/I meets J-STD-002 and JESD 22-B102 solderability standards, ensuring robust placement yield in high-speed pick-and-place processes.
Does the 6DFN18CA-M3/I have polarity markings, and how is it connected in circuit?
No, the 6DFN18CA-M3/I is a bidirectional TVS with no cathode band or polarity marking. Both terminals are functionally identical and interchangeable. In circuit, it is placed across the protected line and ground (or across differential lines), where it conducts equally for positive or negative transients exceeding VBR. This eliminates orientation errors during placement and simplifies layout for AC-coupled or floating signal paths in the 6DFN18CA-M3/I application.
What is the maximum operating junction temperature for the 6DFN18CA-M3/I?
The 6DFN18CA-M3/I has a maximum operating junction temperature (TJmax) of +175 °C, verified per JEDEC standards. This rating allows continuous operation in thermally demanding environments such as enclosed industrial drives or under-hood automotive modules. Derating curves in the 6DFN18CA-M3/I datasheet show pulse power retention down to 50 % at TJ = 125 °C, supporting reliable field performance under sustained thermal stress.
How does the M3 suffix affect the environmental and reliability specifications of the 6DFN18CA-M3/I?
The M3 suffix on the 6DFN18CA-M3/I indicates halogen-free, RoHS-compliant construction with Pb-free terminations and JESD 201 Class 2 whisker resistance. It also certifies compliance with Vishay's industrial-grade material categorization (per doc. 99912). These attributes ensure long-term reliability in high-humidity or high-temperature storage, eliminate toxic emissions during soldering, and meet global regulatory requirements-key considerations for the 6DFN18CA-M3/I in medical and industrial deployments.
6DFN18CA-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):
- 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/I FAQ
1.How can I place an order for 6DFN18CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN18CA-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 6DFN18CA-M3/I reliable?
The price and inventory of 6DFN18CA-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 6DFN18CA-M3/I is usually 5 days.
3.What payment methods are accepted for 6DFN18CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN18CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN18CA-M3/I?
6DFN18CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN18CA-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 6DFN18CA-M3/I?
For technical support, including 6DFN18CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN18CA-M3/I requirements.
6.How does Aetrix verify that 6DFN18CA-M3/I is sourced from the original manufacturer or authorized distributors?
All 6DFN18CA-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 6DFN18CA-M3/I meets industry standards.
7.What is the process for return or replacement of 6DFN18CA-M3/I?
All 6DFN18CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN18CA-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 6DFN18CA-M3/I part is unused and in its original packaging.
Return procedure for 6DFN18CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN18CA-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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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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