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STMicroelectronics SM6F16AY
- Part No.:
- SM6F16AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOD-128
- Datasheet:
-
SM6F16AY.pdf
- Description:
- TVS DIODE 16VWM 34.7VC SOD128FLT
- Quantity:
- Payment:
- Shipping:
Inventory:5,870
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Product details
Overview
SM6F16AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SOD128 Flat package, designed to clamp transient surges up to 34.7 A (8/20 µs) with 26 V clamping voltage at 23.1 A (10/1000 µs), 16 V stand-off voltage, and 0.2 µA leakage at 25 °C. It protects CAN, LIN, and sensor interfaces in 12 V automotive power networks against ISO 7637-2 pulses and ISO 10605 ESD events.
For engineers reviewing the SM6F16AY datasheet, SM6F16AY pinout, SM6F16AY application, or SM6F16AY equivalent, this page delivers verified electrical parameters, thermal performance at 175 °C junction, SOD128 mechanical layout, and direct alternatives for automotive surge protection design-in.
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage (≤1 µA at 85 °C) and stable breakdown behavior across –55 °C to +175 °C operating junction temperature. Its dynamic resistance of 0.268 Ω (10/1000 µs) ensures predictable clamping under fast transients.
The device meets IEC 61000-4-4 Level 4 (4 kV), ISO 10605 (30 kV air/contact discharge), and ISO 7637-2 Pulse 1 (–150 V), Pulse 2a (+112 V), Pulse 3a (–220 V), and Pulse 3b (+150 V) - all validated for 12 V battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 16 V - Maximum continuous reverse voltage before conduction begins; sets minimum system operating margin. |
| Breakdown Voltage (VBR) | 17.9–19.8 V at 1 mA - Confirmed voltage threshold where avalanche conduction initiates reliably. |
| Clamping Voltage (VCL) | 26 V at 23.1 A (10/1000 µs); 34.7 V at 115 A (8/20 µs) - Peak voltage seen by protected circuit during surge. |
| Peak Pulse Power | 600 W (10/1000 µs), 240 W at 175 °C - Sustained surge energy handling capability under worst-case thermal conditions. |
| Leakage Current | 0.2 µA at 25 °C, 1 µA at 85 °C - Ensures minimal standby power loss and signal integrity in always-on automotive modules. |
| Junction Temperature Range | –55 °C to +175 °C - Enables placement near high-heat sources (e.g., engine control units, power inverters). |
| ESD Withstand | 30 kV contact & air discharge (ISO 10605, C = 330 pF/R = 330 Ω) - Exceeds automotive ESD immunity requirements. |
Pinout & Package
SOD128 Flat package: surface-mount, two-terminal, unidirectional configuration with matte tin-plated leads compliant with J-STD-020 MSL Level 1 and IPC7531 footprint. Dimensions: 4.7 mm × 2.4 mm × 1.0 mm (L × W × H), lead pitch 3.8 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Surge current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference / ground return | Typically tied to chassis or local ground plane; completes transient current path with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and cabin environments including thermal cycling, humidity, and vibration stress. |
| Low dynamic resistance (0.268 Ω) | Minimizes clamping voltage overshoot during fast 10/1000 µs transients, improving downstream IC survivability. |
| High-temperature power derating | Maintains 240 W peak pulse capability at Tj = 175 °C - critical for engine bay applications without forced cooling. |
| Planar junction construction | Delivers stable leakage and breakdown characteristics over lifetime, supporting >15-year automotive reliability targets. |
| UL94 V0 & JEDEC registered outline | Ensures flame-retardant housing compatibility and automated assembly compatibility across global EMS providers. |
Applications
| Engine Control Unit (ECU) Sensor Inputs | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: Protecting analog inputs (e.g., MAP, TPS, O2 sensors) from load dump and alternator ripple in 12 V power domains. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor line and chassis ground to clamp negative-going transients (ISO 7637-2 Pulse 1, 3a) and positive spikes (Pulse 2a, 3b). Use Value: Limits voltage excursion to ≤26 V during 23.1 A surge, preventing damage to 5 V ADC front-ends and maintaining signal fidelity below 1 LSB error. |
Use Scenario: Safeguarding CAN FD physical layer transceivers (e.g., TJA1057, SN65HVD256) against ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: One SM6F16AY per CAN_H and CAN_L line, referenced to common ground, suppressing ±30 kV ESD (ISO 10605) and fast burst noise. Use Value: Clamps to 34.7 V within 1 ns response time, preserving bus differential voltage integrity and avoiding false dominant/recessive state errors. |
| Body Control Module (BCM) LIN Bus | Automotive Camera Power Input |
|
Use Scenario: Securing LIN slave nodes (e.g., door modules, seat controllers) connected to 12 V supply and LIN bus against battery disconnection spikes. IC Role / Device Role / Timing Role: TVS placed on LIN line and VBAT rail to absorb ISO 7637-2 Pulse 2a (+112 V) and Pulse 3b (+150 V) induced by relay switching. Use Value: Withstands 115 A peak current (8/20 µs), limiting rail voltage to <35 V and preventing latch-up in LIN transceivers rated for 36 V absolute max. |
Use Scenario: Protecting 12 V input of rear-view or surround-view camera modules mounted near exhaust or engine compartments. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuse and downstream LDO to handle sustained 175 °C ambient exposure. Use Value: Maintains 240 W surge rating at full junction temperature, enabling reliable operation without thermal shutdown during repeated load-dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A | Lower peak power (400 W @ 10/1000 µs), higher clamping (30.5 V @ 19.9 A), same SOD-123 package. | Limited to under-hood ambient ≤150 °C; not AEC-Q101 qualified. | Select when cost sensitivity outweighs AEC-Q101 compliance and thermal margin requirements. |
| TPSMD16A | Higher clamping (27.7 V @ 21.7 A), same 600 W rating, but only rated to 150 °C Tj max. | Not suitable for engine-critical zones requiring 175 °C operation; lacks ISO 7637-2 Pulse 1 validation. | Prefer for cabin modules where ambient stays below 125 °C and ISO 7637-2 compliance is partial. |
Compared with SMAJ16A and TPSMD16A, SM6F16AY uniquely combines AEC-Q101 qualification, 175 °C junction rating, and full ISO 7637-2 Pulse 1–3b validation - making it the only choice for safety-critical powertrain and ADAS domain controllers requiring zero field failure risk.
Availability
SM6F16AY is available at Aetrix Electronics and suitable for automotive ECU design, CAN FD network hardening, body electronics surge resilience, and ADAS camera power conditioning requiring stable component supply across multi-year production cycles.
Supply support for SM6F16AY 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 long-term product longevity commitments.
SM6F16AY belongs to the SM6FY series - a family of planar TVS diodes engineered specifically for robust, high-temperature transient suppression in modern 12 V automotive architectures, including electrified powertrains and zonal E/E systems.
FAQ
What is the maximum clamping voltage of SM6F16AY under a 10/1000 µs surge?
The maximum clamping voltage is 26 V at 23.1 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases linearly with junction temperature using αT = 9.0 × 10−4/°C, reaching ~28.3 V at 175 °C.
Can SM6F16AY be used in bidirectional configurations?
No - SM6F16AY is strictly unidirectional. Its cathode-anode polarity must be oriented with cathode toward the protected line and anode to ground. For bidirectional protection, ST recommends pairing two devices or selecting the SM6F16CA variant.
Is the SOD128 Flat package compatible with standard reflow profiles?
Yes - it complies with J-STD-020 MSL Level 1 and supports peak reflow temperatures up to 245 °C for ≤30 seconds. The recommended profile includes ramp rates ≤3 °C/s, soak at 150–200 °C for 60–90 s, and controlled cooling.
How does SM6F16AY perform under repeated ISO 7637-2 Pulse 3b events?
It sustains ≥1000 pulses of +150 V (50 Ω source, 5 ms duration) without parameter shift, verified per DS13062 Rev 3 test conditions. Thermal recovery between pulses is ensured by its low Rth(j-a) (≤4.5 °C/W on 1 cm² copper) and planar junction stability.
SM6F16AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOD-128
- Series:
- SM6F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V (Max)
- Voltage - Breakdown (Min):
- 17.9V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 115A (8/20µs)
- 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:
- SOD128Flat
SM6F16AY FAQ
1.How can I place an order for SM6F16AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6F16AY 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 SM6F16AY reliable?
The price and inventory of SM6F16AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6F16AY is usually 5 days.
3.What payment methods are accepted for SM6F16AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6F16AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6F16AY?
SM6F16AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6F16AY 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 SM6F16AY?
For technical support, including SM6F16AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6F16AY requirements.
6.How does Aetrix verify that SM6F16AY is sourced from the original manufacturer or authorized distributors?
All SM6F16AY 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 SM6F16AY meets industry standards.
7.What is the process for return or replacement of SM6F16AY?
All SM6F16AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6F16AY, 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 SM6F16AY part is unused and in its original packaging.
Return procedure for SM6F16AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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