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STMicroelectronics SMA6F16AY
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- Part No.:
- SMA6F16AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F16AY.pdf
- Description:
- TVS DIODE 16VWM 26VC SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
SMA6F16AY from STMicroelectronics is a unidirectional 600 W automotive-grade TVS diode in SMA Flat package, designed for ISO 7637-2 pulse suppression and ISO 10605 ESD protection in 12 V/24 V vehicle systems. It features a 16 V stand-off voltage (VRM), 19.8 V maximum clamping voltage at 23.1 A (10/1000 µs), 0.2 µA leakage at 25 °C, and operates up to 175 °C junction temperature - deployed in engine control units, body electronics, and infotainment power rails.
For engineers reviewing the SMA6F16AY datasheet, SMA6F16AY pinout, SMA6F16AY application, or SMA6F16AY equivalent, key selection criteria include clamping performance under ISO 7637 Pulse 1 (−150 V), low dynamic resistance (0.268 Ω), high-temperature reliability (Tj = 175 °C), and AEC-Q101 qualification for automotive deployment.
Technical Context
This unidirectional TVS uses planar silicon technology to achieve low leakage (≤1 µA at 85 °C) and stable breakdown behavior across −55 °C to +175 °C. Its 10/1000 µs surge rating of 600 W and 8/20 µs rating of 4 kW enable robust transient suppression against load dump, inductive switching, and ESD events per ISO 10605 (±30 kV contact/air) and IEC 61000-4-4 Level 4 (±4 kV).
The device's thermal design supports sustained operation at Tj = 175 °C with up to 400 W peak pulse power under elevated junction temperature, validated by JEDEC JESD22-B102 E3 solderability and J-STD-020 MSL Level 1 moisture sensitivity - critical for reflow-compatible automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 16 V - Maximum continuous reverse operating voltage before conduction begins; matches 12 V automotive system nominal with margin for ripple and transients. |
| Breakdown Voltage (VBR) | 17.9–19.8 V at 1 mA - Tight tolerance ensures predictable turn-on during surges without premature conduction during normal operation. |
| Clamping Voltage (VCL) | 26 V at 23.1 A (10/1000 µs) - Limits downstream circuit voltage to safe levels during ISO 7637 Pulse 1 (−150 V) and Pulse 3a (−220 V). |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 4 kW (8/20 µs) - Handles high-energy transients common in alternator load dump and relay coil flyback. |
| Leakage Current (IRM) | 0.2 µA at 25 °C, 1 µA at 85 °C - Minimizes standby power loss and avoids false triggering in low-power sensor interfaces. |
| Junction Temperature Range | −55 °C to +175 °C - Enables placement near heat sources (e.g., power modules, ECUs) without derating or thermal shutdown. |
| AEC-Q101 Qualified | Validated for automotive use per stress test requirements including HTOL, TC, HAST, and ESD - required for Tier 1 supplier BOMs. |
Pinout & Package
SMA6F16AY is housed in an ultra-thin SMA Flat package (1.1 mm max height), JEDEC-registered outline with 2-pin surface-mount configuration. The package complies with IPC7531 footprint standards and supports automated placement and reflow per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Surge current sink terminal | Connected to protected line (e.g., CAN_H, LIN, 12 V rail); conducts transient energy to ground when voltage exceeds VRM. |
| Anode | Reference/ground return | Typically tied to chassis or local ground plane; completes low-inductance path for clamped current during ESD or ISO 7637 events. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified - meets stress testing requirements for temperature cycling, humidity, and ESD, enabling use in safety-critical ECUs. |
| High-temperature capability | Rated for 175 °C junction operation - eliminates need for thermal derating in under-hood applications like battery management or ADAS power supplies. |
| Low dynamic resistance | 0.268 Ω - minimizes clamping voltage rise under high-current transients (e.g., 23.1 A), improving protection margin for 3.3 V/5 V logic rails. |
| Flat, thin profile | 1.1 mm max height - enables routing beneath connectors or in space-constrained modules such as telematics antennas and radar sensors. |
| ESD robustness | ±30 kV contact/air discharge (ISO 10605, C = 150/330 pF) - exceeds automotive ESD immunity requirements without external shielding. |
Applications
| Engine Control Unit (ECU) Power Input | Infotainment System USB Port Protection |
|---|---|
Use Scenario: Protects 12 V supply rail from load dump (ISO 7637 Pulse 1: −150 V) and alternator-induced spikes during ignition cycles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage to clamp transients before they reach LDOs or microcontrollers. Use Value: Clamps to 26 V at 23.1 A, preventing overvoltage damage to 36 V-rated input stages while maintaining <0.2 µA leakage at ambient temperature. |
Use Scenario: Shields USB 2.0 data lines and VBUS from ESD events during hot-plug insertion in center console ports. IC Role / Device Role / Timing Role: Paired SMA6F16AY devices (one per line) provide bidirectional-like protection on VBUS and signal lines using unidirectional architecture with ground reference. Use Value: Withstands ±30 kV contact discharge (ISO 10605) and clamps within 1 ns, preserving signal integrity and avoiding USB enumeration failure. |
| Body Control Module (BCM) LIN Bus | ADAS Camera Power Rail |
Use Scenario: Safeguards LIN transceiver supply (12 V) against battery disconnect transients (ISO 7637 Pulse 3b: +150 V) and electrostatic discharge during service. IC Role / Device Role / Timing Role: Placed upstream of LIN regulator IC to limit voltage excursion during fast-rising pulses, ensuring transceiver remains functional below its 40 V absolute max rating. Use Value: 19.8 V max VBR and 26 V VCL ensure LIN IC sees no more than 26 V during worst-case 23.1 A surge, preserving communication continuity. |
Use Scenario: Protects 5 V or 3.3 V camera module power input from coupled transients induced by nearby motor drivers or solenoid actuation. IC Role / Device Role / Timing Role: Mounted directly at camera connector entry point to shunt energy before it reaches image sensor power pins or serializer ICs. Use Value: Low 0.268 Ω dynamic resistance limits clamping overshoot to <26 V, preventing latch-up or reset in CMOS image sensors rated for ≤3.6 V supply tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F16A | Same electrical specs but non-AEC-Q101 qualified; lacks automotive stress validation. | Restricted to industrial or consumer applications where AEC-Q101 is not mandated. | Select only if automotive qualification is unnecessary and cost is prioritized over long-term field reliability. |
| SMCJ16A | Higher 1500 W (10/1000 µs) rating but larger SMC package (2.6 mm height); same 16 V VRM and 26 V VCL. | Used where higher surge margin is needed and board space allows larger footprint. | Choose when system-level testing reveals insufficient margin with 600 W rating, accepting increased height and thermal mass. |
Compared with SMA6F16A and SMCJ16A, SMA6F16AY uniquely combines AEC-Q101 compliance, 1 mm profile, and verified 600 W surge handling - making it optimal for space-constrained, safety-certified automotive modules where qualification and form factor are non-negotiable.
Availability
SMA6F16AY is available at Aetrix Electronics and suitable for engine control units, body electronics modules, infotainment power supplies, and ADAS camera systems requiring stable component supply across multi-year automotive production cycles.
Supply support for SMA6F16AY 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 capabilities and broad IP portfolio.
SMA6FxxAY belongs to ST's Transil™ automotive TVS family, engineered specifically for ISO 7637-2 and ISO 10605 compliance in harsh-temperature vehicle environments - targeting ECU, BCM, and ADAS subsystem protection.
FAQ
What is the maximum clamping voltage of SMA6F16AY under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 26 V at 23.1 A for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases slightly with junction temperature due to the positive temperature coefficient (αT = 9.0 × 10⁻⁴ /°C), reaching ~27.2 V at Tj = 125 °C per datasheet calculation.
Can SMA6F16AY be used in bidirectional signal line protection?
No - SMA6F16AY is unidirectional and must be installed with cathode toward the protected line. For bidirectional protection (e.g., CAN_H/CAN_L), two unidirectional devices or a dedicated bidirectional TVS like SMA6F16AY-D would be required; this part is intended for power rail or single-polarity signal protection only.
Does SMA6F16AY meet ISO 7637-2 Pulse 1 requirements?
Yes - SMA6F16AY is explicitly characterized for ISO 7637-2 Pulse 1 (VS = −150 V, 12 V battery), with clamping performance validated down to −150 V. Its 26 V clamping voltage at 23.1 A provides >5× margin over the 5 V absolute maximum rating of typical downstream regulators.
What is the recommended PCB footprint for SMA6F16AY?
The recommended footprint follows IPC7531 and JEDEC MO-205AB standards: pad length 1.2 mm, pad width 2.0 mm, spacing 3.0 mm, with 0.8 mm copper area under each lead. Thermal performance improves linearly with copper area - doubling copper area reduces Rth(j-a) by ~30% per Figure 11 in DS12477.
SMA6F16AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA6F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.9V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- Power - Peak Pulse:
- 600W
- 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:
- SMAflat
SMA6F16AY FAQ
1.How can I place an order for SMA6F16AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F16AY 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 SMA6F16AY reliable?
The price and inventory of SMA6F16AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F16AY is usually 5 days.
3.What payment methods are accepted for SMA6F16AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F16AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F16AY?
SMA6F16AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F16AY 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 SMA6F16AY?
For technical support, including SMA6F16AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F16AY requirements.
6.How does Aetrix verify that SMA6F16AY is sourced from the original manufacturer or authorized distributors?
All SMA6F16AY 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 SMA6F16AY meets industry standards.
7.What is the process for return or replacement of SMA6F16AY?
All SMA6F16AY units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F16AY, 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 SMA6F16AY part is unused and in its original packaging.
Return procedure for SMA6F16AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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