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STMicroelectronics SM6T7V5AY
- Part No.:
- SM6T7V5AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T7V5AY.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
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Product details
Overview
SM6T7V5AY from STMicroelectronics is a unidirectional automotive-grade transient voltage suppression (TVS) diode in SMB package, designed for ISO 7637-2 pulse protection in 12 V vehicle systems. It features a 7.5 V nominal breakdown voltage (VBR), 15.2 V clamping voltage (VCL) at 266 A (8/20 µs), 600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood reliability.
For engineers reviewing the SM6T7V5AY datasheet, SM6T7V5AY pinout, SM6T7V5AY application, or SM6T7V5AY equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1 (−150 V), low leakage (<20 µA at VRM = 6.4 V), high junction temperature operation (Tj up to +150 °C), and compatibility with FR4 PCB footprints per IPC7531.
Technical Context
This TVS diode uses planar silicon technology to achieve stable VBR temperature coefficient (αT = 6.1 × 10−4/°C) and low dynamic resistance (RD = 0.065 Ω at 25 °C). Its unidirectional configuration enables asymmetric surge handling-clamping negative transients while blocking reverse DC bias up to 6.4 V.
It meets IEC 61000-4-2 ESD immunity (±30 kV air/contact), ISO 10605 (C = 330 pF/R = 330 Ω), and ISO 7637-2 automotive surge standards including Pulse 1 (−150 V), Pulse 2a (+112 V), Pulse 3a (−220 V), and Pulse 3b (+150 V), with validated performance across −55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 6.40 V - Ensures reliable conduction onset before sensitive 5 V logic rails are overvolted |
| VCL @ 266 A (8/20 µs) | 15.2 V - Limits downstream voltage during high-energy load dump events |
| IPP (8/20 µs) | 266 A - Supports robust protection against fast, high-current transients like ESD and switching noise |
| RD | 0.065 Ω - Minimizes clamping voltage rise under high current, improving protection margin |
| IR @ VRM = 6.4 V | 20 µA max at 25 °C - Prevents excessive standby current in always-on automotive modules |
| Tj max | +150 °C - Enables placement near heat sources (e.g., engine control units) without derating |
| Package | SMB (DO-214AA) - Industry-standard surface-mount outline with IPC7531-compliant footprint |
Pinout & Package
SMB (DO-214AA) package: 2-terminal surface-mount device with cathode band marking; dimensions per JEDEC MS-012 (EIA-481 compliant tape/reel); matte tin-plated leads per JESD 22-B102 E3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; defines forward conduction direction |
| Cathode | Protected line input | Connected to protected signal/power rail (e.g., LIN bus, sensor supply); clamps negative transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use with 1000-cycle temperature cycling and high-temperature operating life testing |
| ISO 7637-2 Pulse 1 compliance | Withstands −150 V surge (12 V battery system) without degradation, enabling direct battery-line protection |
| Low dynamic resistance (0.065 Ω) | Reduces VCL overshoot during fast transients, preserving margin for 5 V microcontroller I/O |
| Junction temperature range (−55 to +150 °C) | Supports operation in extreme environments such as engine control modules and body control units |
| Matte tin lead finish | Ensures solderability per J-STD-002 and whisker resistance per JESD-201 Class 2 |
Applications
| Engine Control Unit (ECU) Power Input | LIN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rail of gasoline/diesel engine ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and local LDO input to clamp negative transients below −150 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V regulators during ISO 7637-2 Pulse 1 (−150 V) events. |
Use Scenario: Safeguarding LIN physical layer transceivers (e.g., TJA1020) connected to vehicle wiring harnesses. IC Role / Device Role / Timing Role: TVS mounted on LIN bus line to suppress ESD and coupled noise from adjacent CAN or power lines. Use Value: Maintains LIN signal integrity by limiting bus voltage to ≤15.2 V during ±30 kV ESD events per ISO 10605. |
| Body Control Module (BCM) Sensor Inputs | Automotive Lighting Driver Supply |
|
Use Scenario: Shielding analog sensor inputs (e.g., ambient temperature, humidity) in BCMs from harness-induced surges. IC Role / Device Role / Timing Role: Low-leakage TVS (20 µA max) placed at op-amp input stage to avoid DC offset errors. Use Value: Enables stable 12-bit ADC readings by preventing transient-induced saturation during door module actuation. |
Use Scenario: Protecting constant-current LED driver ICs (e.g., STP16CP05) in headlamp modules from ignition noise. IC Role / Device Role / Timing Role: TVS on 12 V input rail clamps ISO 7637-2 Pulse 3b (+150 V) transients generated by relay switching. Use Value: Avoids false overvoltage shutdown in LED drivers, ensuring uninterrupted lighting function during cold cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | Higher VBR (6.8–7.6 V), higher VCL (12.4 V @ 48.6 A), lower PPP (400 W) | Rated for general industrial use only; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification requirements |
| 1.5SMC7.5A | Same VBR range but larger SMC package (7.11 × 6.22 mm), higher thermal mass | Requires larger PCB area; better suited for non-space-constrained industrial power supplies | Choose for improved thermal dissipation where SMB footprint is not mandatory |
Compared with SMAJ7.5A and 1.5SMC7.5A, SM6T7V5AY delivers superior automotive reliability via AEC-Q101 validation, tighter VCL (15.2 V vs. ≥12.4 V), and optimized SMB footprint for dense automotive PCB layouts-without sacrificing surge current capability.
Availability
SM6T7V5AY is available at Aetrix Electronics and suitable for engine control units, LIN bus interfaces, body control modules, and automotive lighting systems requiring stable component supply across extended temperature ranges and rigorous automotive qualification.
Supply support for SM6T7V5AY 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 management solutions with over 40 years of analog and protection device expertise.
The SM6TY series was developed specifically for automotive electronics protection, targeting ISO 7637-2 and ISO 10605 compliance in space-constrained, high-reliability 12 V systems such as ECUs, ADAS sensors, and infotainment power rails.
FAQ
What is the maximum clamping voltage of SM6T7V5AY under an 8/20 µs surge?
The maximum clamping voltage (VCL) is 15.2 V at 266 A for an 8/20 µs waveform, measured at Tamb = 25 °C. This value increases with junction temperature per αT = 6.1 × 10−4/°C, reaching ~16.3 V at Tj = 125 °C.
Is SM6T7V5AY suitable for protecting a 5 V microcontroller I/O line?
No-it is rated for 12 V automotive supply rails, not low-voltage I/O. Its 6.4 V minimum breakdown and 15.2 V clamping exceed safe limits for 5 V logic. For 5 V I/O, use a TVS with VBR < 5.5 V and VCL < 9 V, such as SMF5.0A.
How does SM6T7V5AY differ from its bidirectional counterpart SM6T7V5CAY?
SM6T7V5AY is unidirectional (anode-to-cathode conduction only), ideal for DC-biased lines like battery feeds. SM6T7V5CAY is bidirectional, symmetrically clamping both polarities-used for AC-coupled signals like CAN or LIN differential pairs where polarity reversal occurs.
Can SM6T7V5AY be used in a 24 V commercial vehicle system?
No-its 7.5 V nominal breakdown is optimized for 12 V systems. In 24 V applications, it would conduct continuously under normal operating voltage. For 24 V systems, select SM6T24AY (VBR = 20.5–25.2 V) or SM6T33AY (VBR = 28.2–34.7 V) to maintain proper standoff margin.
SM6T7V5AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6TY, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 53A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SM6T7V5AY FAQ
1.How can I place an order for SM6T7V5AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T7V5AY 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 SM6T7V5AY reliable?
The price and inventory of SM6T7V5AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T7V5AY is usually 5 days.
3.What payment methods are accepted for SM6T7V5AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T7V5AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T7V5AY?
SM6T7V5AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T7V5AY 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 SM6T7V5AY?
For technical support, including SM6T7V5AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T7V5AY requirements.
6.How does Aetrix verify that SM6T7V5AY is sourced from the original manufacturer or authorized distributors?
All SM6T7V5AY 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 SM6T7V5AY meets industry standards.
7.What is the process for return or replacement of SM6T7V5AY?
All SM6T7V5AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6T7V5AY, 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 SM6T7V5AY part is unused and in its original packaging.
Return procedure for SM6T7V5AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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