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Vishay General Semiconductor - Diodes Division T6N18AHM3/I
- Part No.:
- T6N18AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
T6N18AHM3/I.pdf
- Description:
- LOW-PROFILE VERSION 600 W UNI-DI
- Quantity:
- Payment:
- Shipping:
Inventory:13,900
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Product details
Overview
T6N18AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® 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), and AEC-Q101 qualification for automotive-grade reliability. It protects signal lines and MOSFETs in automotive sensor units against inductive switching transients and lightning-induced surges.
For engineers reviewing the T6N18AHM3/I datasheet, T6N18AHM3/I pinout, T6N18AHM3/I application, or T6N18AHM3/I equivalent, this page delivers verified electrical parameters, thermal performance at TJ = 185 °C, side-wettable DFN package compatibility with AOI, and direct AEC-Q101-compliant alternatives for high-reliability automotive designs.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for stable clamping under repetitive surge stress. Its unidirectional configuration enables precise reverse-biased protection of DC rails and signal paths without forward conduction interference.
Rated for TJ = -65 °C to +185 °C operation and MSL Level 1 reflow (260 °C peak), the device supports high-temperature automotive environments and automated SMT assembly. Thermal resistance junction-to-mount is 5 °C/W (typ), enabling effective heat transfer to PCB copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (nom) | 18.0 V - ensures reliable triggering above 15.3 V system operating voltage while avoiding false clamping |
| VWM | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA, compatible with 12 V automotive systems |
| PPPM (10/1000 μs) | 600 W - sustains high-energy transients typical of load-dump and ISO 7637-2 pulse 1/2a/5a events |
| VC at IPPM | 25.5 V - clamping voltage during 23.5 A peak pulse, limiting protected IC voltage stress to safe margin |
| TJ max | +185 °C - supports under-hood placement and long-term reliability in AEC-Q101 automotive applications |
| ESD immunity | ±30 kV (IEC 61000-4-2 contact/air) - provides robust electrostatic discharge protection for exposed connectors and sensors |
| Package | DFN3820A - 3.95 mm × 2.18 mm × 0.88 mm low-profile leadless package with side-wettable flanks for AOI-compatible solder joint inspection |
Pinout & Package
DFN3820A package: 2-terminal surface-mount device with anode (heatsink pad) and cathode (marked side). The exposed bottom thermal pad serves as the anode connection and primary heat dissipation path. Dimensions: 3.95 mm × 2.18 mm × 0.88 mm (L × W × H); side-wettable flanks enable automated optical inspection of solder fillets.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (bottom thermal pad) | Power return / heatsink connection | Primary thermal path to PCB copper; must be soldered to large copper pour for RθJM = 5 °C/W performance |
| Cathode (top-side marked terminal) | Transient current sink | Connected to protected line; color band identifies polarity; carries full IPPM surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable DFN flanks | Enables 100% automated optical inspection (AOI) of solder joints without X-ray, reducing post-SMT defect escape |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD stress per JESD22-A110/A108 standards |
| Junction passivated design | Prevents parametric drift and leakage increase after 1000+ surge cycles, ensuring long-term clamping stability |
| 185 °C junction rating | Supports placement near high-power components (e.g., motor drivers) without derating in engine control modules |
| Low profile (0.88 mm height) | Enables compact layout in space-constrained ADAS camera modules and radar sensor PCBs |
Applications
| Automotive Sensor Protection | Engine Control Unit (ECU) Power Rail |
|---|---|
Use Scenario: Protecting LIN/CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-switching transients in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed between sensor output and microcontroller input pin. Use Value: Clamps induced surges to ≤25.5 V while maintaining <1.0 μA leakage at 15.3 V, preserving signal integrity and ADC accuracy. |
Use Scenario: Safeguarding 12 V supply rails feeding MCU, memory, and driver ICs in engine management systems subject to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary rail-level TVS connected between battery feed and local bulk capacitor. Use Value: Absorbs 600 W (10/1000 μs) pulses without degradation, meeting OEM requirements for 15-year under-hood service life. |
| ADAS Camera Module | Electric Power Steering (EPS) |
Use Scenario: Shielding high-speed image sensor interfaces (e.g., MIPI CSI-2) from ESD and board-level coupling noise in surround-view cameras. IC Role / Device Role / Timing Role: Point-of-entry TVS on FPC flex connector interface, adjacent to serializer IC. Use Value: 30 kV IEC 61000-4-2 ESD rating prevents latch-up or pixel corruption during assembly and field handling. |
Use Scenario: Protecting gate drivers and position feedback circuits in EPS motor control units exposed to motor commutation spikes. IC Role / Device Role / Timing Role: Secondary clamping device parallel to main DC-link TVS, targeting low-inductance MOSFET gate paths. Use Value: 0.88 mm height allows placement directly at gate driver IC pins, minimizing parasitic inductance and improving clamping speed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/57T | DO-214AC (SMA) package; 18 V VBR; 600 W PPPM; no AEC-Q101 qualification; RθJA = 40 °C/W (vs. 140 °C/W for T6N18AHM3/I) | Board-level surge protection in industrial controls where automotive qualification is not required | Select when legacy through-hole or larger SMT footprint is acceptable and AEC-Q101 is unnecessary |
| SMF18A | SOD-123FL package; 18 V VBR; 200 W PPPM; AEC-Q101 qualified; 1.1 mm height; lower surge capacity than T6N18AHM3/I | Space-constrained consumer electronics requiring basic automotive compliance but lower surge immunity | Select only if system-level testing confirms 200 W pulse energy suffices; not suitable for ISO 7637-2 Pulse 5a |
Compared with SMAJ18A-E3/57T and SMF18A, the T6N18AHM3/I uniquely combines AEC-Q101 qualification, 600 W surge rating, side-wettable DFN3820A packaging, and 185 °C junction capability-making it the only option qualified for critical automotive power and signal protection where both reliability and miniaturization are mandatory.
Availability
T6N18AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, engine control unit (ECU) power rail safeguarding, and ADAS camera module ESD hardening requiring stable component supply across multi-year production programs.
Supply support for T6N18AHM3/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 high-reliability diodes, MOSFETs, and TVS devices for automotive, industrial, and computing markets.
The T6N18AHM3/I belongs to Vishay's PAR® (Protection Against Transients) family-engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments with emphasis on thermal stability and AOI-ready packaging.
FAQ
What is the breakdown voltage tolerance for T6N18AHM3/I?
The T6N18AHM3/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 consistent clamping behavior across production lots and supports precise overvoltage margin design in 12 V automotive systems where the T6N18AHM3/I is commonly deployed.
Is T6N18AHM3/I compatible with lead-free reflow processes?
Yes, the T6N18AHM3/I is rated for lead-free reflow with a maximum peak temperature of 260 °C per J-STD-020 MSL Level 1, and its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards. The DFN3820A package's side-wettable flanks further ensure process robustness in high-volume SMT lines using the T6N18AHM3/I.
Does T6N18AHM3/I require a heatsink pad on the PCB?
Yes-the exposed anode thermal pad on the underside of the T6N18AHM3/I must be soldered to a minimum 100 mm² copper area to achieve the specified RθJM = 5 °C/W. Without this thermal pad connection, junction temperature rise during 600 W surges will exceed safe limits, compromising reliability and clamping performance of the T6N18AHM3/I.
What is the maximum reverse leakage current of T6N18AHM3/I at 15.3 V and 150 °C?
At VWM = 15.3 V and TJ = 150 °C, the T6N18AHM3/I exhibits a maximum reverse leakage current of 6.0 μA. This elevated leakage-compared to 1.0 μA at 25 °C-is fully characterized in the datasheet and remains within design margins for automotive sensor interfaces where the T6N18AHM3/I is routinely applied.
How does the T6N18AHM3/I compare to standard SMAJ series TVS diodes in surge handling?
The T6N18AHM3/I matches the 600 W (10/1000 μs) peak pulse power of SMAJ18A but achieves it in a 3.95 mm × 2.18 mm DFN3820A package versus SMA's 4.5 mm × 2.7 mm outline. Crucially, the T6N18AHM3/I adds AEC-Q101 qualification, 185 °C operation, and side-wettable flanks-features absent in standard SMAJ devices-making the T6N18AHM3/I suitable for next-generation automotive electronics where the SMAJ18A is insufficient.
T6N18AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- 2-VDFN
- Series:
- PAR®
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN3820A
T6N18AHM3/I FAQ
1.How can I place an order for T6N18AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T6N18AHM3/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 T6N18AHM3/I reliable?
The price and inventory of T6N18AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T6N18AHM3/I is usually 5 days.
3.What payment methods are accepted for T6N18AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T6N18AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T6N18AHM3/I?
T6N18AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T6N18AHM3/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 T6N18AHM3/I?
For technical support, including T6N18AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T6N18AHM3/I requirements.
6.How does Aetrix verify that T6N18AHM3/I is sourced from the original manufacturer or authorized distributors?
All T6N18AHM3/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 T6N18AHM3/I meets industry standards.
7.What is the process for return or replacement of T6N18AHM3/I?
All T6N18AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T6N18AHM3/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 T6N18AHM3/I part is unused and in its original packaging.
Return procedure for T6N18AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T6N18AHM3/I Tags
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