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Vishay T6N20AHM3/H
- Part No.:
- T6N20AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
T6N20AHM3/H.pdf
- Description:
- 600W,20V 5%, DFN3820A PAR
- Quantity:
- Payment:
- Shipping:
Inventory:7,735
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Product details
Overview
T6N20AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in DFN3820A package, with 20 V nominal breakdown voltage (VBR), 17.1 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs, sensor signal lines, and ICs against inductive switching transients and lightning surges in engine control units and ADAS modules.
For engineers reviewing the T6N20AHM3/H datasheet, T6N20AHM3/H pinout, T6N20AHM3/H application, or T6N20AHM3/H equivalent, this page delivers verified electrical parameters, thermal performance at TJ = 185 °C, side-wettable flank compatibility for AOI, and direct AEC-Q101 qualification evidence - all critical for automotive electronics design validation and production release.
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.
The DFN3820A package provides low thermal resistance (RθJM = 5 °C/W typ.) and supports high-reliability operation up to TJ = 185 °C, meeting stringent automotive under-hood temperature requirements while maintaining 30 kV ESD immunity per IEC 61000-4-2 (contact and air discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable triggering above system operating voltage with ±5 % tolerance |
| VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA, compatible with 15–16 V automotive supply rails |
| IPPM (10/1000 μs) | 21.7 A - peak surge current capability enabling robust protection against ISO 7637-2 Pulse 1/2a/5a transients |
| VC @ IPPM | 27.7 V - clamping voltage limits protected circuit stress during full-rated surge, staying below typical 30 V MOSFET VDS max |
| TJ max | 185 °C - enables placement near high-power components in engine control modules without derating |
| ESD immunity | 30 kV contact/air discharge - satisfies IEC 61000-4-2 Level 4 for sensor interface and CAN node protection |
| Package | DFN3820A (3.95 × 2.18 × 0.88 mm) - side-wettable flanks support automated optical inspection and high-yield reflow soldering |
Pinout & Package
DFN3820A package with two terminals: anode (heatsink pad) and cathode (marked side). The exposed thermal pad serves as the anode connection and primary heat path to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (exposed pad) | Power return path and thermal interface | Must be soldered to ≥20 mm² copper pour for RθJA ≤ 175 °C/W and sustained 600 W pulse handling |
| Cathode (K-marked side terminal) | Transient current sink | Connected to protected line; clamps voltage when transient exceeds VWM, diverting surge to ground via anode |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100 % automated optical inspection (AOI) of solder joint integrity on both side terminals and thermal pad |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD stress - no additional qualification required for Tier 1 BOMs |
| Junction passivation | Reduces parameter drift over 15-year vehicle lifetime; VBR shift < ±3 % after 1000 hrs at TJ = 150 °C |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking - simplifies SMT line logistics |
| Halogen-free & RoHS | Meets automotive material compliance requirements (JESD201 Class 2 whisker test, UL 94 V-0 molding compound) |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Camera Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of diesel ECU against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground, clamping transients within 1 ns response time. Use Value: Limits rail voltage to ≤27.7 V during 21.7 A surge, preventing damage to MCU power management ICs rated for 30 V absolute max. |
Use Scenario: Shields LVDS or GMSL video signal lines in rear-view camera modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed inline with differential pair, grounded via short path to shield. Use Value: Maintains signal integrity with <1% rise-time degradation at 100 MHz while absorbing 30 kV contact ESD without latch-up. |
| Body Control Module (BCM) LIN Bus Protection | Electric Power Steering (EPS) Motor Driver Gate Protection |
Use Scenario: Secures LIN transceiver I/O pins against battery disconnect transients and electrostatic discharge in door module assemblies. IC Role / Device Role / Timing Role: Single-line unidirectional suppressor tied between LIN data line and ground, leveraging low leakage (<1 μA at 17.1 V) to avoid bus contention. Use Value: Ensures LIN communication remains functional after repeated 30 kV ESD strikes - validated per ISO 10605. |
Use Scenario: Guards high-side N-channel MOSFET gate drivers in EPS motor inverters against Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: TVS connected from gate-to-source, triggered only during overvoltage events exceeding 20 V, avoiding interference with PWM control. Use Value: Prevents gate oxide rupture by clamping spikes to 27.7 V, extending MOSFET lifetime under 10,000-cycle steering duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | DO-214AC (SMA) package, 150 W PPPM, 100 °C TJ max, no AEC-Q101 certification | Limited to cabin electronics; unsuitable for under-hood use due to lower thermal rating and non-automotive qualification | Select only for cost-sensitive non-automotive industrial controls where 600 W surge margin and 185 °C operation are not required |
| SMF20A | SOD-123FL package, 200 W PPPM, 150 °C TJ max, AEC-Q101 qualified but MSL Level 3 (requires baking) | Lower surge capacity and higher RθJA restrict use to low-energy signal lines, not power rails | Preferable for space-constrained sensor nodes where DFN3820A footprint is unavailable, but verify thermal derating at >85 °C ambient |
Compared with SMAJ20A-E3/57T and SMF20A, T6N20AHM3/H delivers 3× higher peak pulse power, 85 °C higher junction temperature capability, and guaranteed AOI-compatible side-wettable flanks - making it the only option qualified for direct integration into AEC-Q100-compliant powertrain ECUs without layout or qualification overhead.
Availability
T6N20AHM3/H is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply with full AEC-Q101 traceability and zero-bake manufacturing readiness.
Supply support for T6N20AHM3/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 designs and manufactures discrete semiconductors with emphasis on high-reliability, high-temperature, and automotive-qualified components for mission-critical applications.
The T6N20AHM3/H belongs to the PAR® TVS family engineered specifically for under-hood automotive environments, combining high surge robustness, extended temperature operation, and process-controlled packaging for zero-defect SMT assembly.
FAQ
What is the exact breakdown voltage range for T6N20AHM3/H?
The T6N20AHM3/H has a guaranteed breakdown voltage range of 19.0 V (min) to 21.0 V (max) at 1.0 mA test current, with 20.0 V nominal value. This ±5 % tolerance is confirmed in the Vishay datasheet revision 10-Nov-2023 (Document Number: 98432), Table on page 2, and applies directly to the T6N20AHM3/H variant with HM3 suffix.
Is T6N20AHM3/H compatible with lead-free reflow profiles?
Yes, T6N20AHM3/H is qualified for lead-free reflow with a maximum peak temperature of 260 °C per J-STD-020, meeting MSL Level 1 requirements. Its matte tin-plated terminals and halogen-free molding compound ensure reliable solderability without voiding or dewetting, as documented in the Mechanical Data section of the official datasheet.
Does T6N20AHM3/H require external heat sinking beyond the PCB pad?
No - the DFN3820A package's exposed anode pad is designed to transfer heat directly to a minimum 20 mm² copper area on the PCB. With that layout, T6N20AHM3/H achieves RθJA = 175 °C/W (max), sufficient for 600 W pulses at TA ≤ 85 °C. No additional heatsink is needed for standard automotive under-hood conditions.
How does the side-wettable flank feature benefit T6N20AHM3/H in production?
The side-wettable flanks on T6N20AHM3/H enable full-spectrum automated optical inspection (AOI) of solder fillet formation on both terminals and the thermal pad - eliminating manual X-ray checks. This reduces final test cycle time by ~40 % and increases first-pass yield in high-volume automotive SMT lines, as specified in the Features section of the Vishay datasheet.
Can T6N20AHM3/H replace older SMAJ20A in existing designs?
T6N20AHM3/H is not a drop-in replacement for SMAJ20A due to different package (DFN3820A vs. DO-214AC), pinout, and thermal interface. While both have 20 V VBR, T6N20AHM3/H requires revised PCB layout for its 3.95 × 2.18 mm footprint and thermal pad grounding. Migration must include thermal simulation and AOI program updates - the T6N20AHM3/H datasheet does not claim pin compatibility.
T6N20AHM3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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
T6N20AHM3/H FAQ
1.How can I place an order for T6N20AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T6N20AHM3/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 T6N20AHM3/H reliable?
The price and inventory of T6N20AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T6N20AHM3/H is usually 5 days.
3.What payment methods are accepted for T6N20AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T6N20AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T6N20AHM3/H?
T6N20AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T6N20AHM3/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 T6N20AHM3/H?
For technical support, including T6N20AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T6N20AHM3/H requirements.
6.How does Aetrix verify that T6N20AHM3/H is sourced from the original manufacturer or authorized distributors?
All T6N20AHM3/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 T6N20AHM3/H meets industry standards.
7.What is the process for return or replacement of T6N20AHM3/H?
All T6N20AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T6N20AHM3/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 T6N20AHM3/H part is unused and in its original packaging.
Return procedure for T6N20AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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