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Vishay T6N18CAHM3/I
- Part No.:
- T6N18CAHM3/I
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
T6N18CAHM3/I.pdf
- Description:
- 600W,18V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:14,000
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Product details
Overview
T6N18CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® 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 AEC-Q101 qualification for automotive-grade reliability in sensor signal line protection.
For engineers reviewing the T6N18CAHM3/I datasheet, T6N18CAHM3/I pinout, T6N18CAHM3/I application, or T6N18CAHM3/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance at 23.5 A IPPM, DFN3820A mechanical dimensions, and AEC-Q101-compliant supply chain context for high-temperature automotive electronics design.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve bidirectional clamping with low leakage (<1.0 μA at VWM) and stable operation up to TJ = 185 °C. Its DFN3820A package features side-wettable flanks for AOI-compatible solder joint inspection and supports automated placement in high-volume SMT lines.
The device operates as a single-channel, unidirectional-capable bidirectional clamp - no cathode band marking - with junction-to-mount thermal resistance of 5–6.5 °C/W and IEC 61000-4-2 ESD immunity rated at ±30 kV contact/air discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable triggering above system operating voltage while accommodating ±5 % tolerance |
| VWM | 15.3 V - maximum continuous reverse voltage before significant leakage begins; matches 12 V automotive rail + margin |
| IPPM (10/1000 μs) | 23.5 A - peak surge current capability defining clamping robustness against load dump or inductive switching transients |
| VC @ IPPM | 25.5 V - maximum clamped voltage seen by protected IC/MOSFET during full-rated surge, limiting stress on downstream components |
| TJ max | +185 °C - enables operation in under-hood environments without derating loss, supporting AEC-Q101 automotive qualification |
| ESD Rating | ±30 kV (IEC 61000-4-2) - protects sensor interfaces from human-body-model and contact-discharge events in assembly and field use |
| Package | DFN3820A - 3.95 mm × 2.18 mm × 0.88 mm low-profile leadless package with side-wettable flanks for AOI and reflow compatibility |
Pinout & Package
DFN3820A package: 2-terminal, bidirectional configuration with no polarity marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; MSL Level 1, peak reflow 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; symmetric conduction eliminates orientation dependency |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing the bidirectional clamp path; both terminals electrically identical and interchangeable |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity constraints |
| Side-wettable flanks | Supports automated optical inspection (AOI) of solder fillets on DFN edges, improving manufacturing yield verification |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| TJ = 185 °C rating | Eliminates thermal derating in high-ambient under-hood locations, maintaining full 600 W surge capability up to +150 °C ambient |
| Low-profile height (0.88 mm) | Reduces board stack height in space-constrained modules such as radar front-ends and camera ECUs |
Applications
| Automotive Sensor Protection | Power Line Surge Suppression |
|---|---|
Use Scenario: Protecting LIN bus or analog output pins of temperature/pressure sensors mounted near engine compartments. IC Role / Device Role: Bidirectional transient clamp placed directly at connector interface to shunt ESD and load-switching spikes. Use Value: Limits voltage excursion to ≤25.5 V during 23.5 A surges, preventing latch-up or gate oxide damage in connected ASICs. | Use Scenario: Safeguarding 12 V power rails feeding infotainment head units exposed to alternator load dump. IC Role / Device Role: Primary overvoltage suppression element placed upstream of DC/DC converters and LDOs. Use Value: Absorbs 600 W pulses with <1.0 μA leakage at 15.3 V, minimizing standby power loss while surviving repeated surges. |
| ADAS Camera Interface Protection | Industrial CAN Transceiver Protection |
Use Scenario: Shielding MIPI CSI-2 differential pairs in surround-view camera modules from ESD and cable discharge events. IC Role / Device Role: Low-capacitance bidirectional clamp across differential signal lines, leveraging symmetric VBR matching. Use Value: Maintains signal integrity with minimal added capacitance while delivering ±30 kV IEC 61000-4-2 immunity at the PCB edge. | Use Scenario: Protecting CANH/CANL pins of ISO 11898-2 transceivers in commercial vehicle telematics gateways. IC Role / Device Role: Secondary-level TVS placed after common-mode chokes to suppress differential-mode surges exceeding choke capability. Use Value: Clamps transients to 25.5 V before they reach transceiver inputs, preserving fault-tolerant operation per ISO 11898-2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CAHE3/5BT | DO-214AC (SMA) package, 1.85 mm height, higher RθJA (190 °C/W), same VBR/VC specs | Less suitable for ultra-thin modules; requires larger PCB footprint and lacks side-wettable flanks for AOI | Select when legacy SMA layout exists or when higher surge repetition rate is needed due to better thermal mass |
| TPSMD18CA | DO-214AB (SMC) package, 2.3 mm height, 1500 W rating, higher VC (32.4 V @ 32.4 A) | Over-specified for 12 V systems; clamping voltage exceeds safe margin for many 16 V-tolerant ICs | Prefer only where multi-kW surge handling is required and board space allows larger SMC footprint |
Compared with SMAJ18CAHE3/5BT and TPSMD18CA, the T6N18CAHM3/I offers superior board-area efficiency, AOI-ready terminations, and tighter thermal coupling (RθJM = 5–6.5 °C/W) - critical for sustained surge duty in compact automotive modules.
Availability
T6N18CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, ADAS camera interface hardening, and industrial CAN bus surge suppression requiring stable component supply with AEC-Q101 traceability and halogen-free compliance.
Supply support for T6N18CAHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices with emphasis on reliability, power handling, and automotive qualification.
The T6N18CAHM3/I belongs to Vishay's PAR® family of surface-mount TVS diodes engineered specifically for high-temperature, high-reliability automotive electronics where compact size, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the breakdown voltage tolerance of the T6N18CAHM3/I?
The T6N18CAHM3/I has a ±5 % breakdown voltage tolerance, specified as 17.1 V (min) to 18.9 V (max) at 1.0 mA test current. This tight tolerance ensures predictable clamping onset across production lots and supports robust design margins in 12 V automotive systems where the T6N18CAHM3/I is commonly deployed.
Is the T6N18CAHM3/I compatible with lead-free reflow processes?
Yes, the T6N18CAHM3/I is fully compatible with lead-free reflow processes. It meets JEDEC J-STD-020 MSL Level 1 and supports a maximum peak reflow temperature of 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102, and the HM3 suffix confirms qualification to JESD 201 Class 2 whisker testing.
Does the T6N18CAHM3/I require orientation during PCB placement?
No, the T6N18CAHM3/I does not require orientation during PCB placement. As a bidirectional TVS diode in DFN3820A package, it has no cathode band or polarity marking - both terminals are functionally identical and interchangeable, simplifying automated assembly and eliminating orientation-related placement errors.
What is the maximum clamping voltage of the T6N18CAHM3/I under rated surge conditions?
The maximum clamping voltage (VC) of the T6N18CAHM3/I is 25.5 V when subjected to its rated peak pulse current of 23.5 A (10/1000 μs waveform). This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does the T6N18CAHM3/I perform at elevated junction temperatures?
The T6N18CAHM3/I maintains full 600 W surge capability up to TJ = 185 °C, with derating beginning only above TA = 25 °C per Figure 2 in the datasheet. Its low RθJM (5–6.5 °C/W) enables effective heat transfer to the PCB mount pad, sustaining clamping performance in under-hood environments where ambient temperatures exceed 125 °C.
T6N18CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- 2-VDFN
- Series:
- PAR®
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN3820A
T6N18CAHM3/I FAQ
1.How can I place an order for T6N18CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T6N18CAHM3/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 T6N18CAHM3/I reliable?
The price and inventory of T6N18CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T6N18CAHM3/I is usually 5 days.
3.What payment methods are accepted for T6N18CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T6N18CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T6N18CAHM3/I?
T6N18CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T6N18CAHM3/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 T6N18CAHM3/I?
For technical support, including T6N18CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T6N18CAHM3/I requirements.
6.How does Aetrix verify that T6N18CAHM3/I is sourced from the original manufacturer or authorized distributors?
All T6N18CAHM3/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 T6N18CAHM3/I meets industry standards.
7.What is the process for return or replacement of T6N18CAHM3/I?
All T6N18CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T6N18CAHM3/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 T6N18CAHM3/I part is unused and in its original packaging.
Return procedure for T6N18CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T6N18CAHM3/I Tags
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