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STMicroelectronics SMB6F13AY
- Part No.:
- SMB6F13AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F13AY.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:7,956
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Product details
Overview
SMB6F13AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SMB Flat package, designed to clamp transient overvoltages up to 21.5 V (10/1000 µs) at 29 A peak pulse current while maintaining low leakage (0.2 µA @ 25 °C) and operating up to 175 °C junction temperature. It delivers 600 W peak pulse power (10/1000 µs) and meets ISO 7637-2 Pulse 1 (−150 V), Pulse 2a (+112 V), Pulse 3a (−220 V), and Pulse 3b (+150 V) for 12 V battery systems.
For engineers reviewing the SMB6F13AY datasheet, SMB6F13AY pinout, SMB6F13AY application, or SMB6F13AY equivalent, this device is selected for robust ESD and surge protection in automotive power line interfaces where stand-off voltage (13 V), clamping performance (VCL = 21.5 V), thermal resilience (Tj max = 175 °C), and flat 1 mm profile are critical design constraints.
Technical Context
This unidirectional TVS diode uses planar silicon technology to achieve low dynamic resistance (RD = 0.190 Ω at 25 °C) and stable clamping across temperature - VCL increases with junction temperature per αT = 8.4 × 10−4/°C. Its 13 V stand-off voltage (VRM) enables direct placement on 12 V supply rails without false triggering during normal operation.
The SMB Flat package supports high-power dissipation (up to 470 W at Tj = 175 °C) due to optimized thermal path and IPC7531-compliant footprint. It complies with IEC 61000-4-2 (±30 kV contact/air), ISO 10605 (±30 kV), and ISO 7637-2 transients - making it suitable for CAN, LIN, and sensor power rail protection in engine control units and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 13 V - blocks normal 12 V system operation without leakage; sets minimum clamping threshold |
| Breakdown Voltage (VBR) | 14.4–16.0 V @ IBR = 1 mA - defines onset of avalanche conduction under transient stress |
| Clamping Voltage (VCL) | 21.5 V @ IPP = 29 A (10/1000 µs) - maximum voltage seen by protected IC during worst-case surge |
| Peak Pulse Power | 600 W (10/1000 µs), 4 kW (8/20 µs) - sustains high-energy transients common in automotive load dump and inductive switching |
| Leakage Current | 0.2 µA @ 25 °C, 1 µA @ 85 °C - ensures minimal standby power loss and signal integrity in always-on circuits |
| Junction Temperature Range | −55 to +175 °C - supports under-hood deployment in engine management and transmission control modules |
| Dynamic Resistance (RD) | 0.190 Ω @ 25 °C - determines VCL rise slope under fast transients; lower RD improves clamping fidelity |
Pinout & Package
SMB6F13AY is housed in an SMB Flat package (JEDEC DO-214AA), measuring 3.3–3.95 mm × 5.2–5.6 mm × 0.9–1.1 mm height, with matte tin-plated leads compliant to J-STD-002 and MIL-STD-750 Method 2026. The flat profile (1 mm max height) enables low-profile PCB mounting in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JESD22-A114 |
| Low-profile SMB Flat package | 1 mm max height enables integration into compact ECUs and ADAS sensor housings without mechanical interference |
| ISO 7637-2 compliance | Withstands −150 V (Pulse 1), +112 V (Pulse 2a), −220 V (Pulse 3a), +150 V (Pulse 3b) on 12 V lines without degradation |
| High-temperature operation | Rated for continuous operation at Tj = 175 °C - eliminates derating concerns in hot under-hood environments |
| Low dynamic resistance | RD = 0.190 Ω minimizes VCL overshoot during fast 8/20 µs surges, improving downstream IC survivability |
Applications
| Engine Control Unit (ECU) Power Input | CAN Transceiver Protection |
|---|---|
|
Use Scenario: 12 V battery feed to microcontroller power supply in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamps load-dump spikes (ISO 7637-2 Pulse 1) and alternator transients before they reach LDOs or DC-DC converters. Use Value: Prevents brownout-induced MCU resets and latch-up by limiting input voltage to ≤21.5 V during 600 W surges. |
Use Scenario: Protection of CANH/CANL bus lines against ESD and coupled transients in vehicle networking nodes. IC Role / Device Role / Timing Role: Placed between CAN transceiver pins and connector; shunts ±30 kV ESD (IEC 61000-4-2) and ISO 7637-2 Pulse 3b. Use Value: Maintains <100 pF junction capacitance (per curve Fig.7) to avoid CAN bit timing distortion at 500 kbps. |
| Body Control Module (BCM) Lighting Driver | Automotive Sensor Power Rail |
|
Use Scenario: 12 V supply line to LED headlight driver ICs subjected to PWM switching noise and relay bounce. IC Role / Device Role / Timing Role: Absorbs inductive kickback from solenoid drivers and prevents voltage reversal on supply rail. Use Value: Withstands −220 V (ISO 7637-2 Pulse 3a) without failure, ensuring lighting system uptime during door lock/unlock cycles. |
Use Scenario: Power conditioning for MEMS pressure sensors in brake or HVAC systems exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Standby protection element on sensor VDD rail; operates continuously at 125 °C ambient with <1 µA leakage. Use Value: Enables >15-year field life by eliminating parametric drift from leakage-induced bias errors at high Tj. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | Same SMB package but rated for 600 W (10/1000 µs); VBR = 14.4–15.9 V, VCL = 21.5 V @ 29.2 A - nearly identical clamping, but not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial 12 V systems only | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive validation needs |
| 1.5SMC13A | Higher power (1500 W), larger SMC package (7.1 × 6.2 × 2.6 mm); VBR = 14.4–15.9 V, VCL = 21.5 V @ 70 A - same clamping but 2.6× taller and 2.3× footprint area | Requires PCB real estate rework; unsuitable for low-profile modules like camera ECUs | Choose only if higher surge margin (e.g., 24 V truck systems) justifies mechanical redesign |
Compared with SMBJ13A and 1.5SMC13A, SMB6F13AY uniquely combines AEC-Q101 compliance, 1 mm profile, and precise 13 V stand-off in a production-ready SMB Flat package - enabling drop-in replacement in space- and qualification-constrained automotive designs without layout or reliability compromise.
Availability
SMB6F13AY is available at Aetrix Electronics and suitable for automotive engine control units, CAN network nodes, body control modules, and sensor power conditioning requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for SMB6F13AY 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.
SMB6F13AY belongs to the SMB6FxxAY series - a family of AEC-Q101-qualified unidirectional TVS diodes engineered specifically for ISO 7637-2 and ISO 10605 compliance in 12 V automotive power networks.
FAQ
What is the maximum clamping voltage of SMB6F13AY under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 21.5 V at 29 A peak pulse current for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature at αT = 8.4 × 10−4/°C, reaching ~23.1 V at Tj = 150 °C per datasheet Equation 2.
Does SMB6F13AY meet ISO 10605 ESD requirements for automotive applications?
Yes - SMB6F13AY exceeds ISO 10605 level 4 for both C = 150 pF/R = 330 Ω (±30 kV air/contact discharge) and C = 330 pF/R = 330 Ω (±30 kV air/contact discharge). Its planar structure and low leakage ensure repeatable ESD immunity without parameter shift after 1000+ strikes.
Can SMB6F13AY be used on a 24 V automotive system?
No - its 13 V stand-off voltage (VRM) is intended for 12 V nominal systems. Using it on 24 V rails would cause excessive leakage and premature breakdown. For 24 V applications, select SMB6F26AY (VRM = 26 V) or SMB6F33AY (VRM = 33 V), both in the same qualified series.
What is the thermal resistance junction-to-ambient for SMB6F13AY on standard FR4?
On a standard epoxy FR4 board with 70 µm copper and recommended IPC7531 footprint, Rth(j-a) is 120 °C/W for single-pulse conditions (Fig.11). With 2 cm² copper area per lead, it drops to ~45 °C/W - enabling sustained 470 W dissipation at Tj = 175 °C without heatsink.
SMB6F13AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AA, SMB Flat Leads
- Series:
- SMB6FxxAY
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V (Max)
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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:
- SMBflat
SMB6F13AY FAQ
1.How can I place an order for SMB6F13AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F13AY 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 SMB6F13AY reliable?
The price and inventory of SMB6F13AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F13AY is usually 5 days.
3.What payment methods are accepted for SMB6F13AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F13AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F13AY?
SMB6F13AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F13AY 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 SMB6F13AY?
For technical support, including SMB6F13AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F13AY requirements.
6.How does Aetrix verify that SMB6F13AY is sourced from the original manufacturer or authorized distributors?
All SMB6F13AY 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 SMB6F13AY meets industry standards.
7.What is the process for return or replacement of SMB6F13AY?
All SMB6F13AY units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F13AY, 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 SMB6F13AY part is unused and in its original packaging.
Return procedure for SMB6F13AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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