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STMicroelectronics SM6F13AY
- Part No.:
- SM6F13AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOD-128
- Datasheet:
-
SM6F13AY.pdf
- Description:
- TVS DIODE 13VWM 27.2VC SOD128FLT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SM6F13AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SOD128 Flat package, designed to clamp transients up to 21.5 V (clamping voltage at 29 A, 10/1000 µs), with 600 W peak pulse power rating and 13 V stand-off voltage. It protects CAN, LIN, and sensor interfaces in 12 V automotive systems against ISO 7637-2 pulses (Pulse 1, 2a, 3a, 3b) and ESD per ISO 10605 (±30 kV air/contact).
For engineers reviewing the SM6F13AY datasheet, SM6F13AY pinout, SM6F13AY application, or SM6F13AY equivalent, this page delivers verified electrical parameters, thermal performance at 175 °C junction, leakage current behavior across temperature, clamping response under standardized surge waveforms, and footprint-compliant PCB layout guidance for robust automotive circuit protection.
Technical Context
The SM6F13AY employs planar silicon technology to achieve low dynamic resistance (0.19 Ω at 25 °C, 10/1000 µs) and stable breakdown voltage (14.4–16.0 V at 1 mA), enabling precise overvoltage clamping in high-reliability automotive subsystems. Its unidirectional configuration supports DC-biased signal lines such as power-supplied sensor outputs or LIN bus transceivers.
It operates across –55 °C to +175 °C junction temperature, maintaining ≤1 µA leakage at 85 °C and VRM, and delivers 240 W surge capability at Tj = 175 °C (10/1000 µs), meeting stringent under-hood thermal requirements without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 13 V - Maximum continuous reverse operating voltage before significant conduction begins; sets minimum system supply margin for protected line. |
| Breakdown Voltage (VBR) | 14.4–16.0 V at 1 mA - Confirmed voltage range where device enters avalanche conduction; ensures reliable triggering above nominal rail. |
| Clamping Voltage (VCL) | 21.5 V at 29 A (10/1000 µs) - Peak voltage seen by protected IC during worst-case transient; must be below downstream IC absolute max rating. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustained energy absorption capability under standard automotive surge waveform; defines transient handling capacity. |
| Leakage Current (IRM) | 0.2 µA at 25 °C, 1 µA at 85 °C - Low reverse leakage preserves battery life and avoids false triggers in always-on circuits. |
| Junction Temperature (Tj) | –55 to +175 °C - Full operational range validated for engine bay placement; enables direct mounting near heat sources without external heatsinking. |
| Dynamic Resistance (RD) | 0.19 Ω - Low impedance during clamping reduces voltage overshoot and improves energy dissipation efficiency. |
Pinout & Package
SOD128 Flat package: surface-mount, two-terminal, unidirectional configuration with matte tin-plated leads compliant with J-STD-002 and MIL-STD-750 method 2026. Dimensions: 4.7 mm × 2.4 mm × 1.0 mm (L × W × H); thermal pad area optimized for FR4 PCB copper pour (Rth(j-a) = 1.5 °C/W with 2 cm² copper per lead).
| 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 | Connected to system ground or low-impedance return path; completes clamping loop with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per stress test conditions. |
| ISO 10605 ESD immunity | Withstands ±30 kV contact and air discharge (C = 150 pF / 330 Ω and C = 330 pF / 330 Ω), exceeding Level 4 requirements. |
| ISO 7637-2 compliance | Rated for Pulse 1 (–150 V), Pulse 2a (+112 V), Pulse 3a (–220 V), and Pulse 3b (+150 V) on 12 V systems. |
| High-Tj operation | Full 600 W surge capability maintained up to 175 °C junction temperature, eliminating need for thermal derating in hot zones. |
| Low-leakage planar structure | 0.2 µA IRM at 25 °C enables use in always-on vehicle networks (e.g., body control modules, door modules) without battery drain concerns. |
Applications
| Automotive Body Control Module (BCM) | 12 V CAN FD Transceiver Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and discrete drivers in BCMs exposed to load dump and inductive switching transients. IC Role / Device Role: Primary transient voltage suppressor placed directly at connector entry point before ESD protection array. Use Value: Clamps ISO 7637-2 Pulse 1 (–150 V) to ≤21.5 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding CAN FD physical layer transceivers (e.g., TJA1044, SN65HVD256) against coupled surges on vehicle harnesses. IC Role / Device Role: Unidirectional clamping diode on CAN_H and CAN_L lines referenced to local ground plane. Use Value: Limits clamping voltage to 21.5 V while maintaining <1 nF junction capacitance at 0 V, preserving signal integrity up to 5 Mbps. |
| Automotive Occupant Detection Sensor Interface | LIN Bus Node Protection |
Use Scenario: Shielding capacitive or resistive occupant detection sensors (e.g., seatbelt pretensioner control) from ESD and battery reversal spikes. IC Role / Device Role: Standoff-rated TVS on analog front-end inputs feeding ADC channels of safety-critical MCU. Use Value: 13 V VRM aligns with 12 V supply rails; 0.2 µA leakage at 25 °C prevents measurement offset drift in µA-level sensing circuits. | Use Scenario: Protecting LIN transceivers (e.g., TLE7259-3GE, MC33662) in door modules and mirror controls from battery feed transients. IC Role / Device Role: Unidirectional TVS on LIN bus line referenced to local ground, placed adjacent to transceiver input. Use Value: Withstands ISO 7637-2 Pulse 3b (+150 V) with 21.5 V clamping, ensuring transceiver remains functional during ignition switching events. |
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 |
|---|---|---|---|
| SMAJ13A | Same VRM (13 V), but lower PPP (400 W @ 10/1000 µs); higher VCL (23.2 V @ 24.7 A); SOD-123 package (smaller thermal mass). | Not rated for AEC-Q101; limited to non-safety-critical cabin electronics; unsuitable for under-hood deployment. | Select only for cost-sensitive interior modules where 175 °C operation and ISO 7637-2 Pulse 1 compliance are not required. |
| TPSMB13A | Same VRM (13 V), identical PPP (600 W), but higher VCL (22.5 V @ 26.7 A); SMC package (larger footprint, better thermal dissipation). | Qualified to AEC-Q101, but lacks ISO 10605 certification at ±30 kV; requires external ESD staging for full automotive ESD immunity. | Prefer when board space allows SMC and primary threat is load dump rather than ESD; verify system-level ESD testing with additional staged protection. |
Compared with SMAJ13A and TPSMB13A, SM6F13AY uniquely combines AEC-Q101 qualification, ±30 kV ESD immunity, 175 °C operation, and 21.5 V clamping in a compact SOD128 Flat package-making it the only choice for space-constrained, thermally aggressive, and fully certified automotive signal-line protection.
Availability
SM6F13AY is available at Aetrix Electronics and suitable for automotive body control modules, CAN FD transceiver protection, occupant detection sensor interfaces, and LIN bus node protection requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SM6F13AY 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, analog, MEMS, and microcontroller solutions for automotive, industrial, and consumer markets.
The SM6FY series belongs to ST's automotive-grade transient protection product line, engineered specifically for robust, high-temperature, ISO-compliant surge suppression in next-generation vehicle ECUs and sensor nodes.
FAQ
What is the maximum clamping voltage of SM6F13AY under a 10/1000 µs surge?
The maximum clamping voltage is 21.5 V at 29 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases with junction temperature at a rate defined by αT = 8.4 × 10−4 /°C, reaching approximately 23.1 V at Tj = 175 °C.
Is SM6F13AY suitable for bidirectional signal lines like RS-485?
No - SM6F13AY is unidirectional and intended for DC-biased lines such as 12 V CAN, LIN, or sensor supply rails. For bidirectional data buses, ST recommends the bidirectional SM6F13AY variant (not offered) or discrete back-to-back configurations using two unidirectional devices.
Does SM6F13AY require a heatsink for 600 W surge handling?
No - the SOD128 Flat package achieves full 600 W (10/1000 µs) capability without external heatsinking when mounted on a standard FR4 PCB with ≥2 cm² copper area per lead. Thermal resistance drops to 1.5 °C/W under those conditions, limiting ΔT to ~900 °C for a single pulse - well within safe limits due to short duration.
How does SM6F13AY differ from generic SMBJ13A in automotive use?
SM6F13AY is AEC-Q101 qualified, rated for 175 °C operation, certified to ISO 10605 (±30 kV), and validated for ISO 7637-2 Pulse 1–3b. SMBJ13A lacks automotive qualification, has higher clamping voltage (23.2 V), and is not tested for full automotive ESD or surge standards - making it unsuitable for production automotive ECUs.
SM6F13AY 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):
- 13V (Max)
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 27.2V
- Current - Peak Pulse (10/1000µs):
- 147A (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
SM6F13AY FAQ
1.How can I place an order for SM6F13AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6F13AY 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 SM6F13AY reliable?
The price and inventory of SM6F13AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6F13AY is usually 5 days.
3.What payment methods are accepted for SM6F13AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6F13AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6F13AY?
SM6F13AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6F13AY 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 SM6F13AY?
For technical support, including SM6F13AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6F13AY requirements.
6.How does Aetrix verify that SM6F13AY is sourced from the original manufacturer or authorized distributors?
All SM6F13AY 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 SM6F13AY meets industry standards.
7.What is the process for return or replacement of SM6F13AY?
All SM6F13AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6F13AY, 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 SM6F13AY part is unused and in its original packaging.
Return procedure for SM6F13AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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