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STMicroelectronics SM50T7V0AY
- Part No.:
- SM50T7V0AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM50T7V0AY.pdf
- Description:
- AUTOMOTIVE 5000 W, 6 V TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:7,145
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Product details
Overview
SM50T7V0AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SMC package, designed for ISO 7637-2 pulse suppression and ISO 10605 ESD protection in 12 V battery systems. It features a 7.05 V minimum breakdown voltage (VBR), 10.3 V maximum clamping voltage (VCL) at 486 A (10/1000 µs), 0.2 µA leakage current at 25 °C, and 175 °C maximum junction temperature - enabling robust surge protection in e-brake control modules and powertrain ECUs.
For engineers reviewing the SM50T7V0AY datasheet, SM50T7V0AY pinout, SM50T7V0AY application, or SM50T7V0AY equivalent, this page delivers verified electrical parameters, automotive-grade reliability data, SMC package layout details, and direct comparison to functionally aligned alternatives for ISO-compliant circuit hardening.
Technical Context
This TVS diode employs planar silicon technology to achieve low leakage (<0.2 µA) and high thermal stability up to Tj = 175 °C, supporting long-term reliability in under-hood automotive environments. Its unidirectional configuration provides asymmetric clamping optimized for 12 V DC supply rail protection against load dump, reverse battery, and transient pulses defined in ISO 7637-2 (Pulse 1, 2a, 3a, 3b).
The device delivers 5000 W peak pulse power (10/1000 µs) and up to 48 kW (8/20 µs), with dynamic resistance (RD) of 3.57 mΩ at 25 °C - ensuring rapid voltage clamping during fast transients while minimizing energy dissipation in sensitive downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 7.05 V at IR = 1 mA - ensures reliable turn-on before damage threshold of protected 12 V logic or gate drivers |
| VCL (max) | 10.3 V at IPP = 486 A (10/1000 µs) - clamps transients below IC absolute maximum ratings in e-brake solenoid drivers |
| IRM (max) | 20 µA at VRM = 6.0 V - negligible standby current impact on low-power microcontroller wake-up circuits |
| PPP | 5000 W (10/1000 µs) - sustains high-energy ISO 7637-2 Pulse 1 (−150 V) without degradation |
| Tj (max) | 175 °C - enables operation in engine compartment locations where ambient exceeds 125 °C |
| Package | SMC (DO-214AB) - JEDEC-registered surface-mount outline with 7.75–8.15 mm body width and 5.55–6.25 mm length for automated assembly |
| Standards | AEC-Q101 qualified; passes IEC 61000-4-2 Level 4 (±30 kV contact/air), ISO 10605 (±30 kV), ISO 7637-2 Pulse 1/2a/3a/3b |
Pinout & Package
SM50T7V0AY uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode marked by a bar on the body. The package has a nominal footprint of 8.19 mm × 5.11 mm and 1.54 mm lead spacing per IPC-7531 recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to chassis or system ground; forms low-impedance path for negative transients (e.g., ISO 7637-2 Pulse 1) |
| Cathode | Protected line terminal | Connected to 12 V supply rail; blocks reverse current until VBR exceeded, then shunts surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Planar silicon construction | Enables <0.2 µA leakage at 25 °C and stable VBR drift (αT = 10−4/°C), critical for always-on automotive modules |
| Low dynamic resistance (RD) | 3.57 mΩ at 25 °C - minimizes VCL rise during high-current surges, preserving margin for downstream 12 V regulators |
| High junction temperature rating | 175 °C continuous operation - supports placement near heat sources (e.g., power relays, motor drivers) without derating |
| JEDEC-registered SMC outline | Ensures mechanical compatibility with automated pick-and-place equipment and IPC-7351B footprint standards |
| Matt tin lead finish | Meets J-STD-002 solderability requirements and JESD22-B102 E3 whisker resistance Class 2 for long-term field reliability |
Applications
| Electronic Brake Control Module | Engine Control Unit (ECU) Power Input |
|---|---|
|
Use Scenario: Protects solenoid driver ICs and microcontroller power rails from load dump and reverse battery events in brake-by-wire systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V battery input and LDO input capacitor to clamp transients before they reach voltage regulators. Use Value: Clamps ISO 7637-2 Pulse 5b (load dump) to ≤10.3 V, preventing overvoltage shutdown of 5 V/3.3 V logic supplies feeding ABS controllers. |
Use Scenario: Shields MCU, CAN transceivers, and sensor interfaces from alternator-induced spikes during engine cranking and shutdown. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on main 12 V input, coordinated with ceramic decoupling capacitors for sub-µs response. Use Value: Limits ISO 7637-2 Pulse 2a (+112 V) to 10.3 V within 100 ns, avoiding latch-up in 32-bit automotive MCUs with 12 V tolerant I/O. |
| Body Control Module (BCM) Door Actuator Driver | ADAS Camera Power Supply |
|
Use Scenario: Safeguards H-bridge motor drivers powering window lifters and door locks against inductive kickback and battery reversal. IC Role / Device Role / Timing Role: Bidirectional protection is not used; unidirectional SM50T7V0AY guards positive rail only, with separate grounding strategy for negative transients. Use Value: Withstands 5000 W (10/1000 µs) pulses without parametric shift, ensuring >15-year field life in cyclic actuation environments. |
Use Scenario: Secures 12 V-to-5 V/3.3 V power conversion stage for rear-view and surround-view cameras exposed to harsh vehicle electrical noise. IC Role / Device Role / Timing Role: First-line defense upstream of buck converter, reducing ESD-induced reset events during camera module hot-plug or cable disconnect. Use Value: Passes IEC 61000-4-2 ±30 kV contact discharge without degradation, eliminating image corruption caused by transient-induced DC-DC controller glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.0A | VBR min = 7.78 V; VCL = 12.5 V @ 388 A (10/1000 µs); RD = 5.2 mΩ; Tj max = 150 °C | Higher clamping voltage reduces margin for 12 V LDOs; lower Tj rating restricts under-hood placement | Select when cost sensitivity outweighs thermal margin and clamping performance |
| Vishay SMA6J7.0A | VBR min = 7.78 V; VCL = 12.7 V @ 394 A; AEC-Q101 qualified; Tj max = 175 °C but no ISO 7637-2 pulse validation published | Lacks documented ISO 7637-2 Pulse 1/2a/3a/3b test results; requires additional system-level validation | Use only after full automotive transient testing in target application PCB layout |
Compared with SM50T7V0AY, SMAJ7.0A trades 2.2 V higher clamping and 25 °C lower thermal limit for broader distributor availability, while SMA6J7.0A matches junction temperature but lacks published ISO 7637-2 compliance - making SM50T7V0AY the only option with full automotive transient certification out-of-box.
Availability
SM50T7V0AY is available at Aetrix Electronics and suitable for electronic brake control modules, engine control units, body control modules, and ADAS camera power supplies requiring stable component supply across automotive production lifecycles.
Supply support for SM50T7V0AY 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 vertical manufacturing and AEC-Q100/Q101 qualification expertise.
SM50T7V0AY belongs to the SM50TY series - a family of planar TVS diodes engineered specifically for ISO 16750-2 and ISO 7637-2 compliance in 12 V and 24 V automotive power networks, targeting e-brake, ADAS, and powertrain subsystems.
FAQ
What is the exact breakdown voltage range for SM50T7V0AY at 25 °C?
The SM50T7V0AY has a specified VBR range of 6.7 V (typical) to 7.4 V (maximum) at IR = 1 mA and 25 °C, with a minimum value of 7.05 V per Table 2 in DS13895 Rev 2. This tight tolerance ensures consistent turn-on behavior across production lots without requiring post-manufacture binning.
Does SM50T7V0AY support bidirectional transient suppression?
No - SM50T7V0AY is a unidirectional TVS diode, designed exclusively for clamping positive transients on DC supply lines. Its cathode connects to the protected line and anode to ground. For bidirectional protection (e.g., data lines), ST offers the SM50T7V0CAY variant with symmetrical clamping characteristics.
How does the 175 °C junction temperature rating impact PCB layout?
The 175 °C Tj max allows SM50T7V0AY to be placed directly adjacent to high-power components like MOSFETs or relays without thermal derating. However, thermal relief must still follow ST's recommended copper area (≥3 cm² per lead per Figure 12) to maintain Rth(j-a) ≤ 40 °C/W and avoid exceeding Tj under worst-case 5000 W pulse conditions.
Is SM50T7V0AY compatible with lead-free reflow profiles?
Yes - SM50T7V0AY is qualified for lead-free soldering per J-STD-020 MSL Level 1, with a peak reflow temperature of 240–245 °C for ≤60 seconds. The recommended profile (Figure 31) specifies ramp rates of ≤3 °C/s and cooling rate ≥−2 °C/s to prevent solder joint fracture or package delamination.
SM50T7V0AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6V (Max)
- Voltage - Breakdown (Min):
- 6.7V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 486A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SM50T7V0AY FAQ
1.How can I place an order for SM50T7V0AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM50T7V0AY 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 SM50T7V0AY reliable?
The price and inventory of SM50T7V0AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM50T7V0AY is usually 5 days.
3.What payment methods are accepted for SM50T7V0AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM50T7V0AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM50T7V0AY?
SM50T7V0AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM50T7V0AY 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 SM50T7V0AY?
For technical support, including SM50T7V0AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM50T7V0AY requirements.
6.How does Aetrix verify that SM50T7V0AY is sourced from the original manufacturer or authorized distributors?
All SM50T7V0AY 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 SM50T7V0AY meets industry standards.
7.What is the process for return or replacement of SM50T7V0AY?
All SM50T7V0AY units undergo pre-shipment inspection (PSI). If there is an issue with SM50T7V0AY, 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 SM50T7V0AY part is unused and in its original packaging.
Return procedure for SM50T7V0AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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