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STMicroelectronics SM6F36AY
- Part No.:
- SM6F36AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOD-128
- Datasheet:
-
SM6F36AY.pdf
- Description:
- TVS DIODE 36VWM 76VC SOD128FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SM6F36AY 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 36 V stand-off voltage (VRM), 58.1 V clamping voltage at 10.3 A (10/1000 µs), and operates up to 175 °C junction temperature.
For engineers reviewing the SM6F36AY datasheet, SM6F36AY pinout, SM6F36AY application, or SM6F36AY equivalent, key selection criteria include its 36 V VRM, 58.1 V VCL at 10.3 A, 0.2 µA leakage at 25 °C, AEC-Q101 qualification, and SOD128 Flat thermal performance under automotive surge stress.
Technical Context
The SM6F36AY uses planar silicon technology to achieve low leakage (0.2 µA @ 25 °C) and stable breakdown behavior across -55 °C to +175 °C junction range. Its dynamic resistance of 1.35 Ω enables precise clamping during fast transients like ISO 10605 (30 kV contact/air discharge) and ISO 7637-2 Pulse 3b (+150 V).
It delivers 240 W peak pulse power at Tj = 175 °C (10/1000 µs), exceeding standard 600 W rating at 25 °C, and complies with JESD22-B102 E3 solderability, IPC7531 footprint, and JEDEC registered SOD128 outline - critical for high-reliability automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 36 V - maximum continuous reverse operating voltage before significant conduction begins |
| Clamping Voltage (VCL) | 58.1 V at 10.3 A (10/1000 µs) - limits transient voltage seen by protected ICs to safe levels |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs, Tamb = 25 °C); 240 W at Tj = 175 °C - defines surge energy handling capability |
| Leakage Current (IRM) | 0.2 µA @ 25 °C, 1 µA @ 85 °C - ensures minimal standby power loss and signal integrity in always-on circuits |
| Breakdown Voltage (VBR) | 40–44.2 V @ IBR = 1 mA - sharp, repeatable avalanche onset for predictable protection threshold |
| Dynamic Resistance (RD) | 1.35 Ω - determines voltage rise above VBR under surge current, directly impacting clamping accuracy |
| Junction Temperature Range | -55 °C to +175 °C - supports under-hood deployment without derating in engine control units and ADAS modules |
Pinout & Package
SOD128 Flat package: surface-mount, two-terminal device with matte tin-plated leads, JEDEC-registered outline, IPC7531-compliant footprint, and MSL Level 1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or low-impedance return path; conducts surge current to reference plane |
| Cathode | High-side connection to protected line | Placed in series with supply or signal line; clamps positive transients to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and surge endurance per stress test conditions |
| 175 °C junction operation | Enables placement near heat sources (e.g., power converters) without thermal derating of surge capability |
| Low 0.2 µA leakage @ 25 °C | Minimizes quiescent current draw in battery-sensitive systems such as body control modules and telematics |
| ISO 10605 / IEC 61000-4-2 compliance | Withstands 30 kV air/contact discharge (C = 150 pF / 330 Ω and C = 330 pF / 330 Ω), exceeding Level 4 requirements |
| SOD128 Flat thermal design | Optimized copper pad layout reduces Rth(j-a) to ~3.5 °C/W (with 2 cm² Cu area), enabling efficient heat dissipation |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Infotainment Display Interface |
|---|---|
Use Scenario: Protecting 12 V supply rail from load dump and alternator switching transients per ISO 7637-2 Pulse 1 (-150 V) and Pulse 2a (+112 V). IC Role / Device Role: Unidirectional TVS placed between battery feed and LDO input to clamp overvoltage before regulator stage. Use Value: Clamps to 58.1 V at 10.3 A, preventing damage to downstream 3.3 V/5 V logic while maintaining AEC-Q101 reliability. | Use Scenario: Shielding LVDS or FPD-Link III video data lines from ESD events during assembly and field operation. IC Role / Device Role: Low-capacitance TVS on differential pairs to suppress ±30 kV contact discharge without signal distortion. Use Value: 0.2 µA leakage preserves DC bias integrity; 1.35 Ω RD ensures fast response and tight clamping margin for high-speed interfaces. |
| ADAS Camera Module Power Rail | Body Control Module (BCM) LIN Bus Line |
Use Scenario: Safeguarding 5 V camera sensor supply against cranking-induced surges and hot-swap transients in front-facing ADAS cameras. IC Role / Device Role: Primary overvoltage clamp on regulated output of buck converter feeding image sensor and ISP. Use Value: 175 °C operation allows placement adjacent to power inductors; 240 W capability at Tj = 175 °C maintains protection margin under thermal stress. | Use Scenario: Protecting LIN transceiver pins from ESD and battery reversal spikes in door module and seat control units. IC Role / Device Role: Unidirectional TVS on LIN bus line referenced to chassis ground, compliant with ISO 17987-4 immunity requirements. Use Value: 36 V VRM matches typical LIN supply range; 58.1 V VCL ensures transceiver remains within absolute max ratings during ISO 7637-2 Pulse 3a (-220 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Same VRM (36 V), but lower PPP (400 W @ 25 °C), higher VCL (63.6 V @ 10.3 A), and only rated to 150 °C Tj | Lacks AEC-Q101 qualification and fails ISO 7637-2 Pulse 1 (-150 V) margin due to higher clamping | Select only for non-automotive industrial use where ambient temperature stays below 125 °C |
| 1.5SMC36A | Higher PPP (1500 W), but larger SMC package (7.1 × 6.2 mm), no AEC-Q101, and 150 °C Tj limit | Not suitable for space-constrained automotive PCBs; lacks automotive qualification and thermal robustness | Consider only if board area permits and surge requirement exceeds 600 W at 25 °C |
Compared with SMAJ36A and 1.5SMC36A, SM6F36AY uniquely combines AEC-Q101 qualification, 175 °C operation, 58.1 V clamping, and SOD128 footprint-making it the only choice for thermally demanding, safety-critical automotive power rail protection.
Availability
SM6F36AY is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, infotainment displays, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for SM6F36AY 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.
The SM6FY series belongs to ST's automotive-grade transient protection portfolio, engineered specifically for ISO 7637-2 and ISO 10605 compliance in harsh-temperature vehicle subsystems - emphasizing reliability, low leakage, and thermal resilience.
FAQ
What is the maximum clamping voltage of SM6F36AY under a 10/1000 µs surge?
The SM6F36AY clamps to 58.1 V at 10.3 A under a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature per αT = 10 × 10⁻⁴ /°C, reaching ~61.5 V at Tj = 125 °C using the specified temperature coefficient formula.
Is SM6F36AY suitable for bidirectional signal line protection?
No - SM6F36AY is unidirectional and intended for DC power rail protection. For bidirectional signal lines (e.g., CAN, LIN, USB), ST recommends the SMBJ36CA or SMAJ36CA, which provide symmetrical clamping for both polarities and meet ISO 11898-2 or USB-IF ESD requirements.
How does the SOD128 Flat package improve thermal performance over standard SOD-123?
The SOD128 Flat has extended cathode/anode pads and optimized internal die attach, reducing thermal resistance to ~3.5 °C/W (vs. ~5.5 °C/W for SOD-123) when mounted on 2 cm² copper. This enables sustained 240 W surge handling at 175 °C junction temperature - critical for under-hood applications.
Does SM6F36AY require external series impedance for optimal ESD protection?
No external resistor is required for basic ISO 10605 compliance, as the device's 1.35 Ω dynamic resistance and fast response (<1 ns) provide intrinsic current limiting. However, a 0 Ω or low-ohm series resistor (e.g., 0.5 Ω) may be added to reduce peak current into sensitive transceivers during multi-pulse ESD events per system-level testing.
SM6F36AY 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):
- 36V (Max)
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 76V
- Current - Peak Pulse (10/1000µs):
- 52A (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
SM6F36AY FAQ
1.How can I place an order for SM6F36AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6F36AY 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 SM6F36AY reliable?
The price and inventory of SM6F36AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6F36AY is usually 5 days.
3.What payment methods are accepted for SM6F36AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6F36AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6F36AY?
SM6F36AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6F36AY 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 SM6F36AY?
For technical support, including SM6F36AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6F36AY requirements.
6.How does Aetrix verify that SM6F36AY is sourced from the original manufacturer or authorized distributors?
All SM6F36AY 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 SM6F36AY meets industry standards.
7.What is the process for return or replacement of SM6F36AY?
All SM6F36AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6F36AY, 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 SM6F36AY part is unused and in its original packaging.
Return procedure for SM6F36AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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