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Vishay General Semiconductor - Diodes Division SM6T12AHE3_B/I
- Part No.:
- SM6T12AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12AHE3_B/I.pdf
- Description:
- 600W,12V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,085
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Product details
Overview
SM6T12AHE3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 12 V breakdown voltage (VBR = 11.4–12.6 V at 1.0 mA), 10.2 V stand-off voltage (VWM), 16.7 V clamping voltage (VC) at 36 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It protects MOSFETs and sensor signal lines in automotive ECUs against inductive switching transients.
For engineers reviewing the SM6T12AHE3_B/I datasheet, SM6T12AHE3_B/I pinout, SM6T12AHE3_B/I application, or SM6T12AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMB package, and compliance with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR to limit transient overvoltage to ≤16.7 V. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5.0 μA at VWM).
Designed for surface-mount automated placement, it features MSL Level 1 moisture sensitivity, matte tin-plated leads solderable per J-STD-002, and thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA - defines precise conduction onset for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 16.7 V at 36 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge |
| PPPM | 600 W - peak transient energy absorption capability under standardized surge waveform |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJA | 100 °C/W - thermal performance baseline for PCB pad layout design and power dissipation planning |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); mounting pad layout per Vishay spec: 5.59 mm × 2.159 mm footprint with 1.52 mm minimum pad width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; carries full surge current during clamping |
| Cathode | Reverse-biased terminal / protected node connection | Connected to line being protected (e.g., sensor supply or signal); band denotes this end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS sensors |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting 12 V power rails and LIN bus lines from load dump and inductive kickback in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at connector entry point before LDO regulators and microcontrollers. Use Value: Limits transient voltage to ≤16.7 V, preventing latch-up or gate oxide damage in downstream 16-bit MCUs and CAN transceivers. | Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to 4–20 mA current loops driving solenoid valves. IC Role / Device Role / Timing Role: Standoff-clamp protector on signal conditioning front-end, shunting surges before op-amps and ADCs. Use Value: Maintains <5.0 μA leakage at 10.2 V, avoiding offset errors in precision current sensing while clamping 36 A transients. |
| Automotive ADAS Camera Module | Consumer IoT Sensor Hub |
Use Scenario: Shielding MIPI CSI-2 data lines and 3.3 V bias rails in surround-view camera modules exposed to ESD and board-level EFT. IC Role / Device Role / Timing Role: Localized TVS on FPC flex connector interface, co-located with ferrite beads for combined EMI/surge suppression. Use Value: Achieves 16.7 V clamping with <1 ns response time, preserving signal integrity of high-speed video links up to 1.5 Gbps. | Use Scenario: Securing I²C communication lines between environmental sensors (temperature/humidity/pressure) and host MCU in smart home hubs. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used in rail-to-rail configuration across VDD and SDA/SCL lines. Use Value: Delivers 600 W surge rating in compact SMB footprint, enabling protection without compromising space-constrained PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, 12 V VBR, but rated for 400 W PPPM and not AEC-Q101 qualified | Limited to commercial-grade industrial or consumer use; lacks automotive qualification documentation | Select SMAJ12A only for cost-sensitive non-automotive designs where 400 W surge margin suffices |
| 1.5SMC12A | Higher-power SMC package (7.1 mm × 6.2 mm), same 12 V VBR, 1500 W PPPM, AEC-Q101 available in HE3 variant | Requires larger PCB area; suited for higher-energy transients like alternator load dump | Choose 1.5SMC12A when system-level testing requires >600 W immunity or when thermal budget exceeds SMB limits |
Compared with SMAJ12A and 1.5SMC12A, SM6T12AHE3_B/I uniquely balances AEC-Q101 compliance, 600 W surge capacity, and SMB footprint-making it optimal for space-constrained automotive modules requiring validated reliability without over-engineering.
Availability
SM6T12AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive interfaces, and ADAS camera module surge suppression requiring stable component supply and traceable sourcing.
Supply support for SM6T12AHE3_B/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SM6T Series is designed specifically for robust transient voltage suppression in harsh environments-including under-hood automotive, industrial controls, and telecom infrastructure-where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the exact breakdown voltage range for SM6T12AHE3_B/I?
The SM6T12AHE3_B/I has a guaranteed breakdown voltage (VBR) range of 11.4 V to 12.6 V at a test current of 1.0 mA, as specified in the Vishay datasheet revision 09-Jan-2024. This tight 10% tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting 12 V automotive electronics without false triggering.
Is SM6T12AHE3_B/I qualified for automotive applications?
Yes, SM6T12AHE3_B/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and explicit mention in Vishay's ordering information and mechanical data sections. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock-making SM6T12AHE3_B/I suitable for engine control units, body electronics, and ADAS systems where automotive-grade reliability is required.
What does the "_B/I" suffix mean in SM6T12AHE3_B/I?
The "_B/I" suffix in SM6T12AHE3_B/I indicates packaging and reel configuration: "B" denotes the revision code (per Vishay's naming convention), and "I" specifies 13-inch diameter plastic tape-and-reel delivery with 3200 units per reel. This matches the preferred ordering format shown in the Vishay datasheet's Ordering Information table for AEC-Q101-compliant variants.
How does SM6T12AHE3_B/I compare to bidirectional TVS diodes like SM6T12CA?
SM6T12AHE3_B/I is unidirectional and intended for DC line protection (e.g., 12 V supply rails), with cathode marked for correct polarity installation. In contrast, SM6T12CA is bidirectional and used for AC or differential signal lines (e.g., RS-485, CAN). Their electrical specs (VBR, VC, PPPM) are identical, but SM6T12AHE3_B/I must be oriented correctly to avoid forward conduction failure.
What is the maximum clamping voltage of SM6T12AHE3_B/I under surge conditions?
The maximum clamping voltage (VC) of SM6T12AHE3_B/I is 16.7 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 36 A. This value is measured per Figure 1 in the Vishay datasheet and represents the upper limit of voltage seen by protected circuitry during worst-case transient events-critical for ensuring downstream ICs remain within absolute maximum ratings.
SM6T12AHE3_B/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:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T12AHE3_B/I FAQ
1.How can I place an order for SM6T12AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12AHE3_B/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_B/I reliable?
The price and inventory of SM6T12AHE3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SM6T12AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12AHE3_B/I?
SM6T12AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12AHE3_B/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_B/I?
For technical support, including SM6T12AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12AHE3_B/I requirements.
6.How does Aetrix verify that SM6T12AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T12AHE3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SM6T12AHE3_B/I?
All SM6T12AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12AHE3_B/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_B/I part is unused and in its original packaging.
Return procedure for SM6T12AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T12AHE3_B/I Tags
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