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Vishay General Semiconductor - Diodes Division SM6T12AHE3_A/I
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- Part No.:
- SM6T12AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12AHE3_A/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,614
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Product details
Overview
SM6T12AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at IT = 1.0 mA), 10.2 V stand-off voltage (VWM), 16.7 V maximum clamping voltage (VC) at 36 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial electronics.
For engineers reviewing the SM6T12AHE3_A/I datasheet, SM6T12AHE3_A/I pinout, SM6T12AHE3_A/I application, or SM6T12AHE3_A/I equivalent, key selection considerations include its AEC-Q101 qualification, unidirectional polarity with cathode band marking, RoHS-compliant matte tin terminals, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
The SM6T12AHE3_A/I operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to deliver fast response (<1 ps typical) to ESD and surge events. Its electrical behavior is defined by precise VBR, VWM, and VC parameters validated per IEC 61000-4-2/4-5 standards, with clamping action triggered when reverse voltage exceeds VWM.
It is rated for 100 A non-repetitive forward surge current (IFSM) and operates across -65 °C to +150 °C junction temperature range. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive under-hood and body-control module applications requiring high reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA test current - defines precise breakdown threshold for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises above 5.0 μA |
| VC @ IPPM | 16.7 V at 36.0 A (10/1000 μs) - clamping voltage limiting stress on downstream components during surge |
| PPPM | 600 W - peak pulse power handling capability for transient suppression without failure |
| IFSM | 100 A - single half-sine surge current rating supporting inductive load switching protection |
| TJ max. | +150 °C - enables operation in high-temperature automotive environments without derating |
| RθJA | 100 °C/W - thermal resistance indicating required PCB copper area (0.2" × 0.2") for safe power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal for clamping | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane for effective transient diversion |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., ESD, inductive kick) |
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without pre-baking or special handling |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIO and LIN bus transceivers from load dump and alternator ripple in door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping reverse transients on 12 V supply rails and signal lines. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic ICs during 35 V/100 ms load dump events per ISO 16750-2. |
Use Scenario: Shielding digital input terminals of programmable logic controllers from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff voltage (10.2 V) matches 24 V DC industrial logic thresholds while clamping to 16.7 V. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements without external series impedance. |
| Automotive Sensor Signal Line | Consumer Power Adapter Output |
Use Scenario: Safeguarding analog outputs of pressure and temperature sensors connected to engine control units. IC Role / Device Role / Timing Role: Low-capacitance clamping element placed directly at connector interface to minimize stub length. Use Value: Maintains signal integrity with <10 pF junction capacitance at zero bias, avoiding bandwidth degradation in 0–10 kHz sensor signals. |
Use Scenario: Suppressing switching noise and output overvoltage spikes in AC/DC wall adapters for USB-C PD devices. IC Role / Device Role / Timing Role: Secondary-side transient clamp on regulated 5 V/9 V/12 V output rails. Use Value: Limits output voltage excursion to ≤16.7 V during flyback transformer ringing or feedback loop faults, protecting connected devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same VWM (10.2 V) and VC (16.7 V), but lower PPPM = 400 W and higher RθJA = 125 °C/W | Limited to lower-energy transients; not AEC-Q101 qualified | Select SMAJ12A only for cost-sensitive commercial applications where 600 W surge margin is unnecessary |
| 1.5SMC12A | Same VBR/VC specs but larger SMC (DO-214AB) package; 600 W rating, RθJA = 80 °C/W | Requires more PCB area; better thermal performance but incompatible with dense SMB layouts | Choose 1.5SMC12A when board space allows and junction temperature rise must be minimized under sustained pulse conditions |
Compared with SMAJ12A and 1.5SMC12A, SM6T12AHE3_A/I uniquely combines AEC-Q101 qualification, SMB footprint, and full 600 W rating - making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability.
Availability
SM6T12AHE3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and consistent SMB package availability.
Supply support for SM6T12AHE3_A/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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM6T Series was engineered specifically for robust transient suppression in harsh environments, with emphasis on AEC-Q101 qualification, low-inductance packaging, and precise clamping performance across wide temperature ranges.
FAQ
What is the polarity configuration of SM6T12AHE3_A/I?
The SM6T12AHE3_A/I is a unidirectional TVS diode, with polarity indicated by a cathode band on the SMB package. When installed, the banded end connects to the line being protected, and the unmarked anode end connects to ground or reference potential. This configuration ensures conduction only during reverse overvoltage events, preserving normal forward-biased operation of downstream circuits. SM6T12AHE3_A/I does not conduct in forward bias under normal conditions.
Is SM6T12AHE3_A/I qualified for automotive applications?
Yes, SM6T12AHE3_A/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision 09-Jan-2024. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. This qualification validates its use in automotive body control modules, sensor interfaces, and infotainment power supplies where reliability under thermal and electrical stress is mandatory. SM6T12AHE3_A/I meets these standards out-of-the-box.
What is the maximum clamping voltage of SM6T12AHE3_A/I under surge conditions?
The maximum clamping voltage (VC) of SM6T12AHE3_A/I is 16.7 V when subjected to a 10/1000 μs waveform peak pulse current of 36.0 A. This value is measured at the device terminals under standardized test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads). It represents the upper voltage limit imposed on protected circuitry during worst-case surge events, ensuring downstream ICs rated for ≤20 V absolute maximum survive transient exposure. SM6T12AHE3_A/I maintains this clamping performance across its full operating temperature range.
Does SM6T12AHE3_A/I require special PCB layout considerations?
Yes, SM6T12AHE3_A/I requires adherence to Vishay's recommended mounting pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal and pulse power performance. Deviating from this layout increases RθJA and reduces IPPM capability. Trace inductance must also be minimized - especially for cathode-to-ground paths - to prevent voltage overshoot during fast transients. SM6T12AHE3_A/I benefits from direct, short connections to ground planes rather than daisy-chained routing.
How does SM6T12AHE3_A/I differ from bidirectional variants like SM6T12CA?
SM6T12AHE3_A/I is unidirectional and features a cathode band for polarity identification, whereas SM6T12CA is bidirectional with no polarity marking and symmetric clamping in both directions. The unidirectional SM6T12AHE3_A/I offers lower leakage current (<5.0 μA at VWM) and is suited for DC-biased lines like power rails and single-ended signals. Bidirectional SM6T12CA is used for AC-coupled or floating lines such as data buses. SM6T12AHE3_A/I cannot substitute for SM6T12CA in AC applications without circuit redesign.
SM6T12AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 36A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T12AHE3_A/I FAQ
1.How can I place an order for SM6T12AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12AHE3_A/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 SM6T12AHE3_A/I reliable?
The price and inventory of SM6T12AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T12AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12AHE3_A/I?
SM6T12AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12AHE3_A/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 SM6T12AHE3_A/I?
For technical support, including SM6T12AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12AHE3_A/I requirements.
6.How does Aetrix verify that SM6T12AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T12AHE3_A/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 SM6T12AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T12AHE3_A/I?
All SM6T12AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12AHE3_A/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 SM6T12AHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T12AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T12AHE3_A/I Tags
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