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STMicroelectronics SM6F6.0AY
- Part No.:
- SM6F6.0AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOD-128
- Datasheet:
-
SM6F6.0AY.pdf
- Description:
- TVS DIODE 6VWM 13.7VC SOD128FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SM6F6.0AY from STMicroelectronics is an AEC-Q101-qualified unidirectional 600 W transient voltage suppressor (TVS) diode in SOD128 Flat package, designed for automotive circuit protection against ISO 7637-2 pulses and IEC/ISO ESD events. It features a 6.0 V stand-off voltage (VRM), 7.05 V typical breakdown voltage (VBR) at 10 mA, 10.3 V clamping voltage (VCL) at 61 A (10/1000 µs), and operates up to 175 °C junction temperature.
For engineers reviewing the SM6F6.0AY datasheet, SM6F6.0AY pinout, SM6F6.0AY application, or SM6F6.0AY equivalent, this part is selected for high-reliability 12 V automotive power line surge suppression where low leakage (<0.2 µA at 25 °C), tight VBR tolerance (±5%), and robust 8/20 µs pulse handling (290 A) are critical design requirements.
Technical Context
The SM6F6.0AY employs planar silicon technology to achieve stable dynamic resistance (0.048 Ω at 10/1000 µs) and low temperature coefficient (5.9 × 10⁻⁴ /°C), enabling predictable clamping performance across –55 °C to +175 °C. Its unidirectional configuration supports reverse-biased placement on positive supply rails.
It meets ISO 10605 (±30 kV air/contact discharge), IEC 61000-4-2 (±30 kV), IEC 61000-4-4 Level 4 (±4 kV), and 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) | 6.0 V - Maximum continuous reverse operating voltage before significant leakage; sets minimum system rail margin for 12 V automotive applications. |
| Breakdown Voltage (VBR) | 7.05 V (typ) at 10 mA - Onset of avalanche conduction; defines threshold for transient clamping activation. |
| Clamping Voltage (VCL) | 10.3 V at 61 A (10/1000 µs) - Peak voltage seen by protected IC during surge; ensures downstream 16 V-rated components remain within safe operating area. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustained energy absorption capability at 25 °C; derates to 240 W at 175 °C junction temperature. |
| Leakage Current (IRM) | 0.2 µA max at VRM and 25 °C - Minimal standby power loss and signal integrity impact in always-on vehicle modules. |
| Junction Temperature Range | –55 °C to +175 °C - Enables under-hood deployment without thermal derating in engine control units and body controllers. |
| Dynamic Resistance (RD) | 0.048 Ω (10/1000 µs) - Low impedance during clamping ensures rapid voltage stabilization and minimal overshoot during fast transients. |
Pinout & Package
SOD128 Flat package: surface-mount, two-terminal, lead-free matte tin-plated, JEDEC-registered outline (4.7 mm × 2.4 mm × 1.0 mm), IPC7531-compliant footprint, MSL Level 1, 260 °C soldering peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Surge current sink | Connected to protected line (e.g., battery rail); conducts avalanche current to ground during overvoltage events. |
| Anode | Reference node | Typically tied to system ground; establishes reference for clamping action and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test conditions. |
| High-temperature surge capability | 240 W peak pulse power at Tj = 175 °C - enables use in high-ambient under-hood locations without external heatsinking. |
| Low dynamic resistance | 0.048 Ω (10/1000 µs) - minimizes clamping voltage rise under high-current surges, improving protection margin for sensitive MCUs. |
| ESD robustness | ±30 kV contact/air discharge (ISO 10605, C = 330 pF/R = 330 Ω) - exceeds automotive infotainment and ADAS interface immunity requirements. |
| Planar junction construction | Enables stable leakage current (<1 µA at 85 °C) and tight VBR distribution - critical for consistent protection behavior across production lots. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus Line |
|---|---|
|
Use Scenario: Protects 12 V supply input of diesel/gasoline engine ECUs from load dump and alternator-induced transients per ISO 7637-2 Pulse 1 and Pulse 2a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local DC/DC input, clamping surges within 10 ns to limit voltage excursion below 16 V. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers and CAN transceivers during cold-crank or jump-start events. |
Use Scenario: Shields LIN physical layer transceivers from ESD and coupled noise on vehicle body wiring harnesses. IC Role / Device Role / Timing Role: Bidirectionally unclamped (unidirectional configuration used with pull-up) on LIN bus line, absorbing ±30 kV ESD strikes per ISO 10605. Use Value: Maintains LIN communication integrity during service operations (e.g., door module replacement) without requiring external series resistors or RC filters. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
|
Use Scenario: Safeguards 12 V input of rear-view or surround-view camera modules mounted near bumpers exposed to repeated ESD events. IC Role / Device Role / Timing Role: TVS placed directly at camera module connector, clamping fast-rising ESD transients before they reach image sensor and ISP power domains. Use Value: Eliminates video glitching or black-screen failures during static discharge from passenger contact, meeting OEM EMC validation targets. |
Use Scenario: Protects H-bridge gate driver ICs and current sense amplifiers in EPS systems from inductive kickback during motor commutation. IC Role / Device Role / Timing Role: Mounted at motor driver power stage input, suppressing ISO 7637-2 Pulse 3a (–220 V) and Pulse 3b (+150 V) induced by relay switching and PWM transitions. Use Value: Ensures uninterrupted torque assist during aggressive steering maneuvers by preventing transient-induced reset or fault latching in motor control ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0A | Lower PPP (400 W), higher VCL (10.5 V at 64.5 A), SMC package (larger footprint, higher thermal mass) | Not AEC-Q101 qualified; suitable for industrial but not automotive safety-critical systems | Select only if AEC-Q101 compliance is not required and board space allows SMC footprint. |
| TPSMD6.0A | Same PPP (600 W), slightly higher VBR (7.22 V min), same SOD128 package, AEC-Q101 qualified | Higher IRM (1 µA at 25 °C vs. 0.2 µA) - less suitable for ultra-low-power always-on modules | Prefer when tighter VBR tolerance is secondary to cost, but avoid in battery-sensitive telematics modules. |
Compared with SMAJ6.0A and TPSMD6.0A, SM6F6.0AY delivers superior low-leakage performance and guaranteed 175 °C operation, making it the optimal choice for next-generation automotive ECUs where thermal margin and standby current are design-critical constraints.
Availability
SM6F6.0AY is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering designs requiring stable component supply with full automotive qualification traceability.
Supply support for SM6F6.0AY 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 broad IP portfolio.
The SM6FxxAY series belongs to ST's automotive-grade TVS portfolio, engineered specifically for ISO 7637-2 and ISO 10605 compliance in harsh-temperature vehicle environments - targeting power line and data line protection in ASIL-B/C systems.
FAQ
What is the maximum clamping voltage of SM6F6.0AY under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 10.3 V at 61 A for a 10/1000 µs waveform, measured at 25 °C ambient. At 175 °C junction temperature, VCL increases to approximately 11.2 V due to the 5.9 × 10⁻⁴ /°C temperature coefficient, verified per DS13062 Table 2 and Figure 5.
Is SM6F6.0AY suitable for bidirectional surge protection?
No - SM6F6.0AY is a unidirectional TVS diode, intended for reverse-biased connection on positive supply rails. For bidirectional protection (e.g., data lines), ST recommends the SMBJ6.0CA or SMCJ6.0CA series, which feature symmetrical clamping in both polarities.
How does SM6F6.0AY perform under ISO 7637-2 Pulse 3b?
SM6F6.0AY withstands ISO 7637-2 Pulse 3b (+150 V, 50 Ω source impedance, 15 ms duration) with no degradation when mounted on the recommended IPC7531 footprint and operated within its 175 °C junction limit, as confirmed in DS13062 Section 1.1 and Figure 15.
What is the marking code for SM6F6.0AY on the device body?
The top-side marking is "5AKY", as specified in DS13062 Table 6. This 4-character code uniquely identifies the SM6F6.0AY variant within the SM6FxxAY family and corresponds to the 6.0 V stand-off voltage and unidirectional configuration.
SM6F6.0AY 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):
- 6V (Max)
- Voltage - Breakdown (Min):
- 6.7V
- Voltage - Clamping (Max) @ Ipp:
- 13.7V
- Current - Peak Pulse (10/1000µs):
- 290A (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
SM6F6.0AY FAQ
1.How can I place an order for SM6F6.0AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6F6.0AY 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 SM6F6.0AY reliable?
The price and inventory of SM6F6.0AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6F6.0AY is usually 5 days.
3.What payment methods are accepted for SM6F6.0AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6F6.0AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6F6.0AY?
SM6F6.0AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6F6.0AY 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 SM6F6.0AY?
For technical support, including SM6F6.0AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6F6.0AY requirements.
6.How does Aetrix verify that SM6F6.0AY is sourced from the original manufacturer or authorized distributors?
All SM6F6.0AY 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 SM6F6.0AY meets industry standards.
7.What is the process for return or replacement of SM6F6.0AY?
All SM6F6.0AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6F6.0AY, 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 SM6F6.0AY part is unused and in its original packaging.
Return procedure for SM6F6.0AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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