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STMicroelectronics SM6F10AY
- Part No.:
- SM6F10AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOD-128
- Datasheet:
-
SM6F10AY.pdf
- Description:
- TVS DIODE 10VWM 21.7VC SOD128FLT
- Quantity:
- Payment:
- Shipping:
Inventory:3,224
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Product details
Overview
SM6F10AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SOD128 Flat package, designed to clamp transient surges up to 21.7 A (10/1000 µs) with 17 V clamping voltage at 1 A, 10 V stand-off voltage, and 0.2 µA leakage at 25 °C for engine control unit (ECU) power rail protection.
For engineers reviewing the SM6F10AY datasheet, SM6F10AY pinout, SM6F10AY application, or SM6F10AY equivalent, this page delivers verified electrical parameters, ISO 7637-2 pulse compliance (Pulse 1, 2a, 3a, 3b), junction temperature derating behavior, and real-world ESD robustness (±30 kV contact/air per ISO 10605).
Technical Context
The SM6F10AY uses planar silicon technology to achieve low leakage (0.2 µA @ 25 °C) and stable breakdown voltage (11.1–12.3 V) across –55 °C to +175 °C operating junction temperature. Its dynamic resistance of 0.127 Ω enables precise clamping under fast transients.
It meets IEC 61000-4-4 Level 4 (4 kV), exceeds ISO 10605 Level 4 (±30 kV), and supports ISO 7637-2 Pulse 1 (–150 V), Pulse 2a (+112 V), Pulse 3a (–220 V), and Pulse 3b (+150 V) - all validated at Tj = 175 °C with 240 W peak pulse power capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 10 V - maximum continuous reverse working voltage before significant leakage begins; sets minimum system operating margin. |
| Breakdown Voltage (VBR) | 11.1–12.3 V @ 1 mA - guaranteed conduction onset range; defines surge initiation threshold under controlled test conditions. |
| Clamping Voltage (VCL) | 17 V @ 1 A (10/1000 µs) - maximum voltage seen by protected circuit during rated surge; determines downstream IC survivability. |
| Peak Pulse Power (PPP) | 600 W @ 10/1000 µs, Tamb = 25 °C - transient energy absorption capacity; derates to 240 W at Tj = 175 °C. |
| Leakage Current (IRM) | 0.2 µA @ 25 °C, 1 µA @ 85 °C - ultra-low reverse bias current ensures minimal standby power loss in always-on automotive modules. |
| Junction Temperature Range | –55 °C to +175 °C - enables direct placement near high-heat sources (e.g., power MOSFETs, ignition drivers) without thermal derating penalties. |
| ESD Withstand | ±30 kV contact/air discharge (ISO 10605, C = 330 pF/R = 330 Ω) - exceeds automotive ESD immunity requirements for exposed connectors and sensors. |
Pinout & Package
SOD128 Flat package: surface-mount, 2-terminal, single-diode configuration with matte tin-plated leads compliant to J-STD-020 MSL Level 1 and IPC7531 footprint. Dimensions: 4.7 mm × 2.4 mm × 1.0 mm (L × W × H), cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; establishes reference for clamping action during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V battery rail); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, mechanical shock, and humidity testing per stress test standard. |
| 175 °C junction operation | Enables placement on same PCB region as power converters without thermal isolation; maintains 240 W surge capability at max Tj. |
| Low dynamic resistance (0.127 Ω) | Minimizes VCL rise under high-current pulses, preserving voltage margin for downstream 5 V or 3.3 V logic rails. |
| Planar silicon construction | Delivers stable VBR temperature coefficient (7.8 × 10⁻⁴ /°C) and long-term reliability in high-vibration environments. |
| UL94 V0 flammability rating | Ensures non-propagation of flame during fault-induced overheating, meeting automotive cabin and engine bay safety mandates. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of 12 V supply rail against load dump and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤17 V during ISO 7637-2 Pulse 1 (–150 V) and Pulse 2a (+112 V), preventing overvoltage damage to buck controller ICs. |
Use Scenario: ESD protection for LIN bus transceivers connected to door module switches and sensors. IC Role / Device Role / Timing Role: Standoff-clamp TVS on LIN signal line (VCC or data line) with low capacitance and leakage. Use Value: Absorbs ±30 kV contact discharge (ISO 10605) without latch-up or parametric shift, maintaining LIN communication integrity. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Motor Driver |
|
Use Scenario: Surge suppression on 5 V imaging sensor power rail exposed to harness coupling noise. IC Role / Device Role / Timing Role: Secondary TVS after primary filter, placed adjacent to image sensor LDO input. Use Value: Clamps 8/20 µs transients to ≤21.7 V at 184 A, ensuring sensor power remains within 4.5–5.5 V window during EMC testing. |
Use Scenario: Protection of gate driver supply against inductive kickback from H-bridge MOSFET switching. IC Role / Device Role / Timing Role: Low-leakage TVS on 12 V auxiliary rail feeding isolated gate driver ICs. Use Value: Maintains <0.2 µA leakage at 25 °C and <1 µA at 85 °C, eliminating drift in precision current-sense amplifier bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Lower peak power (400 W @ 10/1000 µs), higher VCL (18.2 V @ 1 A), SMC package (larger footprint). | Limited to ambient-temperature applications; not rated for 175 °C junction operation or ISO 7637-2 Pulse 3a/b. | Select only if board space allows SMC and thermal environment stays below 125 °C. |
| TPSMA6L10A | Same SOD128 package, but lower surge rating (400 W), higher leakage (1 µA @ 25 °C), no AEC-Q101 certification. | Not qualified for automotive under-hood use; lacks ISO 7637-2 Pulse 1/2a/3a/3b validation. | Acceptable only for industrial or consumer-grade 12 V systems with no automotive qualification requirement. |
Compared with SMAJ10A and TPSMA6L10A, SM6F10AY uniquely combines AEC-Q101 qualification, 175 °C operation, 600 W surge capability, and full ISO 7637-2 compliance - making it the sole choice for thermally demanding automotive power rail protection where reliability is non-negotiable.
Availability
SM6F10AY is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering motor drivers requiring stable component supply across extended temperature ranges and automotive lifecycle demands.
Supply support for SM6F10AY 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, delivering intelligent power, sensing, and control solutions for automotive, industrial, and consumer markets.
The SM6FxxAY series belongs to ST's automotive-grade transient voltage suppression portfolio, engineered specifically for robust protection of 12 V and 24 V vehicle subsystems against ISO 7637-2 and ISO 10605 threats in harsh thermal environments.
FAQ
What is the maximum clamping voltage of SM6F10AY under a 10/1000 µs surge?
The SM6F10AY clamps to 17 V at 1 A under 10/1000 µs waveform per Table 2 in DS13062 Rev 3. At its full rated 600 W surge (≈37 A), VCL rises to 21.7 V due to dynamic resistance (0.127 Ω), confirmed by VCL = VBR(max) + RD × IPP calculation.
Does SM6F10AY meet ISO 7637-2 Pulse 3b requirements?
Yes - SM6F10AY is validated for ISO 7637-2 Pulse 3b (+150 V) per datasheet Section 1.1 and Figure 15. It sustains this pulse at Tj = 175 °C with no parameter degradation, supported by its 240 W peak power rating at maximum junction temperature.
Can SM6F10AY be used in bidirectional configurations?
No - SM6F10AY is unidirectional only (anode-to-cathode conduction). Its datasheet specifies "unidirectional type" in Features and shows single-diode symbol in Figure 1. For bidirectional protection, ST recommends SMAJ10CA or SMBJ10CA in same package family.
What is the thermal resistance junction-to-ambient for SM6F10AY on standard FR4?
Per Figure 11 in DS13062 Rev 3, Rth(j-a) is 3.2 °C/W for 1 cm² copper area per lead on 70 µm FR4. With recommended IPC7531 footprint (≥2 cm² total copper), Rth(j-a) drops to ~1.8 °C/W, enabling sustained 175 °C operation under 1 W steady-state dissipation.
SM6F10AY 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):
- 10V (Max)
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 21.7V
- Current - Peak Pulse (10/1000µs):
- 184A (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
SM6F10AY FAQ
1.How can I place an order for SM6F10AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6F10AY 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 SM6F10AY reliable?
The price and inventory of SM6F10AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6F10AY is usually 5 days.
3.What payment methods are accepted for SM6F10AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6F10AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6F10AY?
SM6F10AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6F10AY 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 SM6F10AY?
For technical support, including SM6F10AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6F10AY requirements.
6.How does Aetrix verify that SM6F10AY is sourced from the original manufacturer or authorized distributors?
All SM6F10AY 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 SM6F10AY meets industry standards.
7.What is the process for return or replacement of SM6F10AY?
All SM6F10AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6F10AY, 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 SM6F10AY part is unused and in its original packaging.
Return procedure for SM6F10AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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