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STMicroelectronics SMA6T6V7AY
- Part No.:
- SMA6T6V7AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6T6V7AY.pdf
- Description:
- TVS DIODE 5VWM 13.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:10,573
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Product details
Overview
SMA6T6V7AY from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for automotive circuit protection against ISO 7637-2 load dump pulses and IEC/ISO ESD events. It features a 6.7 V breakdown voltage (VBR), 9.1 V clamping voltage (VCL) at 68 A (10/1000 µs), 0.2 µA leakage at 5 V, and operates up to 150 °C junction temperature in SMA (DO-214AC) package.
For engineers reviewing the SMA6T6V7AY datasheet, SMA6T6V7AY pinout, SMA6T6V7AY application, or SMA6T6V7AY equivalent, this device is selected for high-reliability 12 V automotive power rail surge protection where low leakage, AEC-Q101 qualification, and robust 30 kV ESD immunity are required.
Technical Context
This TVS diode uses planar silicon technology to achieve stable VBR with ±5% tolerance (6.4–7.1 V), low dynamic resistance (0.029 Ω), and minimal capacitance (<1000 pF at 1 V). Its unidirectional configuration enables forward conduction during negative transients while blocking reverse current under normal bias.
The device meets ISO 10605 (30 kV air/contact discharge), IEC 61000-4-2 (level 4), and ISO 7637-2 Pulse 1 (−150 V), Pulse 2a (+112 V), Pulse 3a (−220 V), and Pulse 3b (+150 V) - all validated per AEC-Q101 stress testing at Tj = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 6.40 / 6.70 / 7.10 V - Ensures reliable turn-on before sensitive downstream ICs exceed absolute maximum ratings |
| VCL @ 68 A (10/1000 µs) | 9.10 V - Limits peak voltage seen by protected circuit during 600 W surge |
| IR @ VRM = 5 V | 20 µA max at 25 °C - Minimizes standby power loss in always-on automotive modules |
| PPP (10/1000 µs) | 600 W - Sustains repeated load dump surges without degradation in engine control units |
| Tj max | +150 °C - Supports operation adjacent to hot engine compartments without derating |
| Package | SMA (DO-214AC) - JEDEC-registered surface-mount outline compatible with standard reflow profiles |
Pinout & Package
SMA6T6V7AY is housed in a 2-terminal SMA (DO-214AC) package with cathode band marking. The anode and cathode terminals are arranged in axial orientation on a single-sided PCB footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Surge return path | Connected to ground or low-impedance chassis return to shunt transient energy safely |
| Cathode (banded end) | Protected line connection | Connected directly to the 12 V supply rail being safeguarded against overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood environments including thermal cycling, humidity, and mechanical shock |
| 30 kV ESD immunity (ISO 10605) | Eliminates need for external ESD protection in infotainment and body control modules |
| Low dynamic resistance (0.029 Ω) | Reduces clamping voltage overshoot during fast-rising transients like ISO 7637-2 Pulse 3b |
| Matte tin lead finish | Ensures solderability and whisker resistance per JESD201 Class 2 in long-life automotive applications |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Supply |
|---|---|
Use Scenario: 12 V battery feed to microcontroller power domain exposed to alternator load dump and cranking transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fuse output and LDO input to clamp surges before regulation. Use Value: Clamps to ≤9.1 V at 68 A, preventing LDO overvoltage failure and ensuring continuous MCU operation during ISO 7637-2 Pulse 1 (−150 V). | Use Scenario: 12 V supply rail powering isolated CAN transceivers and local sensors in door modules. IC Role / Device Role / Timing Role: Primary surge suppressor on VCC line upstream of DC-DC converter feeding CAN PHY. Use Value: Withstands 30 kV contact ESD per ISO 10605 without latch-up, preserving CAN communication integrity during service disconnect/reconnect. |
| Advanced Driver Assistance System (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: 12 V input to image sensor power management IC in rear-view camera module mounted near exhaust. IC Role / Device Role / Timing Role: First-line protection against thermal-induced leakage drift and pulse 3a (−220 V) transients during ignition. Use Value: Maintains <0.2 µA leakage at 85 °C, avoiding false wake-up in sleep-mode cameras while clamping within safe VIN limits. | Use Scenario: High-current 12 V rail feeding H-bridge gate drivers and current sense amplifiers in EPS motor control unit. IC Role / Device Role / Timing Role: Parallel-mounted TVS across bulk capacitor to absorb repetitive switching noise and load dump energy. Use Value: 600 W peak power rating sustains >1000 cycles of ISO 7637-2 Pulse 2a (+112 V) without parameter shift or thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6T6V8A | VBR = 6.8 V (min 6.12 V), VCL = 9.2 V @ 67 A - slightly higher clamping and tighter VBR tolerance | Preferred where 12 V system nominal voltage tolerances require tighter VBR matching | Select when design margin requires <0.1 V VBR deviation from nominal rail |
| SMC6T6V8A | Same VBR/VCL, but SMC (DO-214AB) package - 1.5× larger footprint, 1.5 kW PPP rating | Suitable for higher-energy systems (e.g., 24 V commercial vehicles) requiring extended surge endurance | Choose only if PCB layout allows larger SMC footprint and 1.5 kW surge headroom is needed |
Compared with SMA6T6V7AY, SMA6T6V8A offers tighter VBR control for precision 12 V rail protection, while SMC6T6V8A trades miniaturization for higher surge capacity - neither is pin-compatible due to differing package outlines and thermal mass.
Availability
SMA6T6V7AY is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for SMA6T6V7AY 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power discrete technologies with broad manufacturing and quality certification infrastructure.
SMA6TY series belongs to ST's Transil™ automotive TVS portfolio, engineered specifically for robust ISO 7637-2 and ISO 10605 compliance in harsh-temperature vehicle subsystems - not general-purpose surge suppression.
FAQ
Is SMA6T6V7AY bidirectional or unidirectional?
SMA6T6V7AY is unidirectional: it conducts only during reverse-biased overvoltage events (cathode positive), making it ideal for protecting positive 12 V rails. Its counterpart SMA6T6V7CAY is bidirectional and used in AC-coupled or dual-polarity signal lines.
What is the maximum operating temperature and thermal derating behavior?
The device operates up to +150 °C junction temperature. Peak pulse power decreases linearly above 25 °C ambient - at 125 °C, it delivers ~65% of rated 600 W (10/1000 µs), per Figure 3 in DS6931. Thermal resistance (junction-to-ambient) is ~50 °C/W on 1 cm² FR4 copper.
How does its clamping voltage compare to competing 6.7 V TVS diodes?
At 68 A (10/1000 µs), SMA6T6V7AY clamps to 9.1 V - among the lowest in its class. Competing devices like Littlefuse SMAJ6.0A specify 10.5 V at same current, resulting in ~15% higher stress on downstream regulators and ICs during surge events.
Can SMA6T6V7AY replace SMAJ6.0A in existing designs?
No direct replacement: SMA6T6V7AY has higher VBR (6.4–7.1 V vs. 5.7–6.3 V) and lower VCL (9.1 V vs. 10.5 V), but different thermal profile and AEC-Q101 qualification. Redesign validation is required for automotive use; non-automotive applications may need VBR compatibility review.
SMA6T6V7AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6TY, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 298A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6T6V7AY FAQ
1.How can I place an order for SMA6T6V7AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6T6V7AY 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 SMA6T6V7AY reliable?
The price and inventory of SMA6T6V7AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6T6V7AY is usually 5 days.
3.What payment methods are accepted for SMA6T6V7AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6T6V7AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6T6V7AY?
SMA6T6V7AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6T6V7AY 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 SMA6T6V7AY?
For technical support, including SMA6T6V7AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6T6V7AY requirements.
6.How does Aetrix verify that SMA6T6V7AY is sourced from the original manufacturer or authorized distributors?
All SMA6T6V7AY 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 SMA6T6V7AY meets industry standards.
7.What is the process for return or replacement of SMA6T6V7AY?
All SMA6T6V7AY units undergo pre-shipment inspection (PSI). If there is an issue with SMA6T6V7AY, 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 SMA6T6V7AY part is unused and in its original packaging.
Return procedure for SMA6T6V7AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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