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STMicroelectronics SMB6F16AY
- Part No.:
- SMB6F16AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F16AY.pdf
- Description:
- TVS DIODE 16VWM 26VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,425
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Product details
Overview
SMB6F16AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SMB Flat package, designed to clamp transient overvoltages up to 26 V (VCL) at 23.1 A (IPP) under 10/1000 µs surge, with 16 V stand-off voltage (VRM) and 0.2 µA leakage at 25 °C. It delivers 600 W peak pulse power and supports junction temperatures up to +175 °C for engine bay and powertrain ESD/surge protection.
For engineers reviewing the SMB6F16AY datasheet, SMB6F16AY pinout, SMB6F16AY application, or SMB6F16AY equivalent, this device is selected for ISO 7637-2 Pulse 1/2a/3a/3b-compliant automotive circuit protection where low leakage, high Tj stability, and flat-profile PCB mounting are required.
Technical Context
This TVS diode uses planar silicon technology to achieve low dynamic resistance (RD = 0.268 Ω) and stable clamping behavior across temperature - VCL increases linearly with junction temperature via αT = 9.0 × 10−4/°C. Its unidirectional configuration enables DC-biased line protection without reverse conduction during normal operation.
It meets IEC 61000-4-2 (±30 kV air/contact), ISO 10605 (±30 kV), and ISO 7637-2 Pulse 1 (−150 V), Pulse 2a (+112 V), Pulse 3a (−220 V), and Pulse 3b (+150 V) requirements. The 1 mm profile and IPC7531-compliant footprint support high-density automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 16 V - Maximum continuous reverse operating voltage before breakdown begins. |
| Breakdown Voltage (VBR) | 17.9–19.8 V at 1 mA - Ensures reliable triggering above system nominal voltage with margin. |
| Clamping Voltage (VCL) | 26 V at 23.1 A (10/1000 µs) - Limits downstream IC voltage stress during transients. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustains automotive load dump and inductive switching surges. |
| Leakage Current (IR) | 0.2 µA at 25 °C, 1 µA at 85 °C - Minimizes standby power loss in always-on vehicle modules. |
| Junction Temperature Range | −55 to +175 °C - Enables placement near heat sources (e.g., ECUs, motor drivers). |
| Dynamic Resistance (RD) | 0.268 Ω - Low impedance ensures fast, predictable clamping response under surge conditions. |
Pinout & Package
SMB6F16AY is housed in an SMB Flat package (JEDEC DO-214AA), measuring 3.3–3.95 mm × 5.2–5.6 mm × 1.0 mm max height, with matte tin-plated leads compliant to J-STD-002 and MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Surge current sink | Connected to protected line; conducts during overvoltage to shunt energy to ground. |
| Anode | Reference / return path | Typically tied to ground or lower-potential rail; completes clamping loop during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including thermal cycling, humidity, and mechanical shock. |
| Flat 1 mm profile | Enables low-profile placement on space-constrained PCBs while maintaining thermal performance. |
| ISO 7637-2 compliance | Withstands −150 V (Pulse 1), +112 V (Pulse 2a), −220 V (Pulse 3a), and +150 V (Pulse 3b) transients. |
| Low dynamic resistance | RD = 0.268 Ω ensures minimal VCL rise under high-current surges, improving protection margin. |
| High-temperature reliability | Stable leakage and clamping up to Tj = +175 °C supports long-term operation in harsh environments. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Lines |
|---|---|
|
Use Scenario: Protects 12 V supply rail against load dump and alternator transients in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between battery input and upstream DC-DC converter. Use Value: Clamps to 26 V at 23.1 A, preventing damage to 36 V-rated regulators and microcontrollers. |
Use Scenario: Shields high-speed CAN FD transceivers from ESD and coupled noise on vehicle body networks. IC Role / Device Role / Timing Role: Line-side TVS on CAN_H/CAN_L differential pair, mounted adjacent to connector. Use Value: Withstands ±30 kV contact discharge per ISO 10605 while adding <100 pF capacitance at 1 V bias. |
| ADAS Camera Power Interface | Electric Power Steering (EPS) Motor Driver Inputs |
|
Use Scenario: Guards 5 V/3.3 V camera module power lines against ignition-induced spikes in front-end ADAS systems. IC Role / Device Role / Timing Role: Secondary protection stage after primary fuse and LC filter, placed close to image sensor IC. Use Value: 0.2 µA leakage preserves low-power sleep mode integrity; 175 °C rating accommodates proximity to lens heating elements. |
Use Scenario: Safeguards gate driver supply rails in EPS H-bridge circuits exposed to motor back-EMF and battery reversal. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used in split-rail configuration across VDD and GND. Use Value: 600 W surge rating handles repetitive 112 V Pulse 2a events during steering actuation cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A | Same SMB package but rated for 600 W (10/1000 µs); VCL = 25.8 V at 23.5 A; RD = 0.25 Ω; non-AEC-Q101. | Lacks AEC-Q101 qualification; suitable for industrial or non-safety-critical automotive subsystems. | Select when cost sensitivity outweighs automotive qualification requirements and thermal derating is managed externally. |
| SMCJ16A | Larger SMC package (DO-214AB); 1500 W rating; VCL = 25.8 V at 58.1 A; RD = 0.12 Ω; AEC-Q101 qualified. | Higher surge capacity but 2.3× larger footprint; requires more PCB area and thermal relief. | Choose when system-level surge threat exceeds 600 W or when extended lifetime under repeated transients is critical. |
Compared with SMBJ16A and SMCJ16A, SMB6F16AY uniquely balances AEC-Q101 compliance, 1 mm profile, and precise 16 V stand-off in a cost-effective SMB Flat package - ideal for volume automotive modules where board space and qualification are both non-negotiable.
Availability
SMB6F16AY is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera interfaces, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for SMB6F16AY 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.
SMB6F16AY belongs to the SMB6FxxAY series - a family of AEC-Q101-qualified planar TVS diodes engineered specifically for ISO 7637-2 and ISO 10605 compliance in automotive power and data line protection.
FAQ
What is the maximum clamping voltage of SMB6F16AY under a 10/1000 µs surge?
The maximum clamping voltage is 26 V at 23.1 A under 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature at αT = 9.0 × 10−4/°C, reaching ~28.3 V at Tj = 125 °C.
Is SMB6F16AY compatible with lead-free reflow soldering processes?
Yes - it supports ST's recommended ECOPACK® reflow profile with peak temperature of 240–245 °C for ≤60 seconds, conforming to IPC/JEDEC J-STD-020 MSL Level 1. Matte tin plating ensures solderability and whisker resistance per JESD-201 Class 2.
How does SMB6F16AY differ from generic SMBJ16A in automotive use?
SMB6F16AY is AEC-Q101 qualified, features a thinner 1 mm profile, and is optimized for ISO 7637-2 Pulse 1/2a/3a/3b waveforms. SMBJ16A lacks automotive qualification and has higher leakage (1 µA vs. 0.2 µA at 25 °C), making it unsuitable for long-life, high-reliability vehicle modules.
Can SMB6F16AY be used on bidirectional signal lines like CAN or LIN?
No - it is unidirectional only. For bidirectional data lines, a pair of SMB6F16AY devices (anode-to-anode or cathode-to-cathode) may be used, but ST recommends dedicated bidirectional TVS such as SMB6F16AY's counterpart SMB6F16CA for true symmetrical protection.
SMB6F16AY 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):
- 16V (Max)
- Voltage - Breakdown (Min):
- 17.9V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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
SMB6F16AY FAQ
1.How can I place an order for SMB6F16AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F16AY 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 SMB6F16AY reliable?
The price and inventory of SMB6F16AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F16AY is usually 5 days.
3.What payment methods are accepted for SMB6F16AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F16AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F16AY?
SMB6F16AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F16AY 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 SMB6F16AY?
For technical support, including SMB6F16AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F16AY requirements.
6.How does Aetrix verify that SMB6F16AY is sourced from the original manufacturer or authorized distributors?
All SMB6F16AY 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 SMB6F16AY meets industry standards.
7.What is the process for return or replacement of SMB6F16AY?
All SMB6F16AY units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F16AY, 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 SMB6F16AY part is unused and in its original packaging.
Return procedure for SMB6F16AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F16AY Tags
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