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Vishay T6N18CAHM3/H
- Part No.:
- T6N18CAHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
T6N18CAHM3/H.pdf
- Description:
- 600W,18V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,110
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Product details
Overview
T6N18CAHM3/H 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), and 600 W peak pulse power (10/1000 μs), designed for automotive-grade ESD and surge protection of sensor signal lines and MOSFET gates.
For engineers reviewing the T6N18CAHM3/H datasheet, T6N18CAHM3/H pinout, T6N18CAHM3/H application, or T6N18CAHM3/H equivalent, key selection criteria include AEC-Q101 qualification, TJ = 185 °C operation, side-wettable flanks for AOI, and clamping voltage of 25.5 V at 23.5 A IPPM - critical for robust CAN/LIN bus and ADAS sensor interface protection.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable bidirectional clamping under repetitive transients. Its DFN3820A package delivers low thermal resistance (RθJM = 5 °C/W typ.) and supports automated placement with solderable matte tin terminals meeting J-STD-002 and JESD 22-B102.
Rated for -65 °C to +185 °C junction temperature, it meets IEC 61000-4-2 ±30 kV contact/air discharge and is MSL Level 1 compliant (260 °C reflow peak). The device operates as a single-circuit, unidirectional-capable bidirectional clamp with no cathode marking.
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 avoiding false trips during normal transients |
| VWM | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA, compatible with 12 V automotive supply rails |
| IPPM (10/1000 μs) | 23.5 A - peak surge current handling capacity defining transient energy absorption capability |
| VC @ IPPM | 25.5 V - clamped voltage during full-rated surge, limiting stress on downstream ICs like microcontrollers or transceivers |
| PPPM | 600 W - peak pulse power rating enabling protection against ISO 7637-2 Pulse 1/2a/5a surges in automotive environments |
| TJ max | +185 °C - enables operation in high-temperature under-hood locations without derating penalties |
| ESD immunity | ±30 kV (IEC 61000-4-2) - provides robust electrostatic discharge protection for exposed connectors and sensors |
Pinout & Package
Package: DFN3820A - 2-terminal, leadless, side-wettable flanks, 3.95 mm × 2.18 mm × 0.88 mm (L × W × H), halogen-free, RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Common terminal pair for symmetrical clamping | No polarity marking required; interchangeable connection for AC-coupled or differential signal lines |
| Case (exposed pad) | Thermal and electrical ground reference | Must be soldered to PCB thermal pad per JEDEC 51-14 layout for RθJM = 5 °C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., LIN, CAN FD), and floating sensor outputs without polarity concerns |
| Side-wettable flanks | Supports automated optical inspection (AOI) of solder joints - essential for zero-defect automotive manufacturing |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| 185 °C junction rating | Eliminates derating in engine control units, battery management systems, and ADAS radar modules operating near heat sources |
| DFN3820A footprint | Compatible with SMP (DO-220AA) land pattern - allows drop-in replacement in existing designs using legacy SOD-123 or SMA layouts |
Applications
| Automotive Sensor Protection | CAN/LIN Bus Interface |
|---|---|
Use Scenario: Protecting analog output pins of pressure, temperature, and position sensors in engine bay modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed directly at sensor connector entry point to clamp fast-rising spikes before reaching ADC input or signal conditioner. Use Value: Limits voltage excursion to ≤25.5 V during 23.5 A surges, preserving sensor accuracy and preventing latch-up in 3.3 V/5 V signal chain ICs. | Use Scenario: Guarding CAN transceiver inputs against ESD events and coupled transients on vehicle communication networks. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100 pF at 0 V) TVS placed adjacent to CANH/CANL pins to suppress ±30 kV ESD without distorting 1 Mbps data edges. Use Value: Maintains signal integrity by clamping within 25.5 V while adding <1 ns response delay - critical for fault-tolerant CAN FD timing budgets. |
| Power Supply Rail Clamp | Motor Driver Gate Protection |
Use Scenario: Safeguarding 12 V supply inputs to body control modules and lighting drivers subjected to ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary rail-level clamp absorbing up to 600 W surge energy before upstream LDOs or DC-DC converters. Use Value: Withstands 185 °C junction temperature, enabling direct placement on high-current traces without thermal derating in compact ECUs. | Use Scenario: Shielding gate drive signals of N-channel MOSFETs in BLDC motor inverters from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Fast-response TVS connected between gate and source to clamp dv/dt-induced overshoot below MOSFET VGS(max). Use Value: 25.5 V clamping voltage ensures gate oxide safety margin for 20 V-rated logic-level MOSFETs used in automotive motor control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CAHE3/5BT | DO-214AC (SMA) package; 140 °C max TJ; 600 W rating; same VBR/VC specs | Larger footprint (4.5 × 2.7 mm); no side-wettable flanks; not AEC-Q101 qualified | Preferred for cost-sensitive industrial designs where AOI and automotive qualification are not required |
| TPSMD18CA | DO-214AB (SMC) package; 175 °C max TJ; 1500 W rating; higher VC = 29.2 V at 51.7 A | Higher power handling but larger size (7.1 × 6.2 mm); less suitable for space-constrained ADAS modules | Selected when system-level surge tests exceed 600 W, e.g., heavy-duty truck battery disconnect scenarios |
Compared with SMAJ18CAHE3/5BT and TPSMD18CA, the T6N18CAHM3/H uniquely combines AEC-Q101 qualification, 185 °C operation, and DFN3820A miniaturization - making it the only option for next-generation automotive ECUs requiring zero-defect AOI, under-hood thermal resilience, and PCB area reduction.
Availability
T6N18CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN/LIN bus protection, and motor driver gate circuits requiring stable component supply across extended temperature ranges and high-reliability production programs.
Supply support for T6N18CAHM3/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with over 50 years of power and protection component expertise.
The T6N18CAHM3/H belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS family, engineered specifically for high-temperature, high-reliability automotive surge suppression where traditional silicon avalanche diodes fail under sustained thermal stress.
FAQ
What is the exact breakdown voltage tolerance for T6N18CAHM3/H?
The T6N18CAHM3/H has a breakdown voltage tolerance of ±5 %, specified as 17.1 V (min), 18.0 V (nominal), and 18.9 V (max) at 1.0 mA test current. This tight tolerance ensures consistent clamping behavior across production lots and supports precise system-level surge margin calculations in automotive designs.
Is T6N18CAHM3/H compatible with lead-free reflow processes?
Yes, T6N18CAHM3/H is fully compatible with lead-free reflow processes, rated for MSL Level 1 per J-STD-020 with a maximum peak temperature of 260 °C. Its matte tin-plated terminals meet J-STD-002 and JESD 22-B102 solderability standards, and the HM3 suffix confirms compliance with JESD 201 Class 2 whisker testing.
Does T6N18CAHM3/H require a heatsink for 600 W pulse handling?
No, T6N18CAHM3/H does not require an external heatsink for single 10/1000 μs pulses. Its DFN3820A package achieves RθJM = 5 °C/W (typ.) when mounted on a 10 mm² copper thermal pad, allowing full 600 W pulse dissipation without exceeding 185 °C junction temperature - verified per JEDEC 51-14 test method.
How does the side-wettable flank design of T6N18CAHM3/H improve manufacturing yield?
The side-wettable flanks on T6N18CAHM3/H enable automated optical inspection (AOI) of solder joint quality on both lateral edges of the DFN package. This eliminates manual visual checks and X-ray verification, reducing defect escape rates in automotive production lines where zero PPM is mandated for safety-critical modules.
Can T6N18CAHM3/H replace older SMA-style TVS diodes in existing PCB layouts?
T6N18CAHM3/H is not a direct footprint replacement for SMA packages, but its DFN3820A outline is compatible with SMP (DO-220AA) land patterns. Migration requires minor layout revision to match the 3.95 mm × 2.18 mm pad array and exposed thermal pad - however, this enables 40 % board area reduction and improved thermal performance over SMAJ18CAHE3/5BT.
T6N18CAHM3/H 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/H FAQ
1.How can I place an order for T6N18CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T6N18CAHM3/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 T6N18CAHM3/H reliable?
The price and inventory of T6N18CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T6N18CAHM3/H is usually 5 days.
3.What payment methods are accepted for T6N18CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T6N18CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T6N18CAHM3/H?
T6N18CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T6N18CAHM3/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 T6N18CAHM3/H?
For technical support, including T6N18CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T6N18CAHM3/H requirements.
6.How does Aetrix verify that T6N18CAHM3/H is sourced from the original manufacturer or authorized distributors?
All T6N18CAHM3/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 T6N18CAHM3/H meets industry standards.
7.What is the process for return or replacement of T6N18CAHM3/H?
All T6N18CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T6N18CAHM3/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 T6N18CAHM3/H part is unused and in its original packaging.
Return procedure for T6N18CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T6N18CAHM3/H Tags
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