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STMicroelectronics SMB6F6.0A
- Part No.:
- SMB6F6.0A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F6.0A.pdf
- Description:
- TVS DIODE 6VWM 10.3VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
SMB6F6.0A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode in SMB Flat package, designed for surge protection of sensitive electronics. It features a stand-off voltage of 6.0 V, clamping voltage of 10.3 V at 61 A (10/1000 µs), and operates up to 175 °C junction temperature-ideal for automotive power line and industrial I/O interface protection.
For engineers reviewing the SMB6F6.0A datasheet, SMB6F6.0A pinout, SMB6F6.0A application, or SMB6F6.0A equivalent, key selection criteria include clamping performance under 8/20 µs surges, low leakage (<1 µA at 85 °C), thermal robustness at Tj = 175 °C, and compliance with IEC 61000-4-2 level 4 (±30 kV contact/air discharge).
Technical Context
This TVS diode uses planar silicon technology to achieve low dynamic resistance (0.048 Ω at 25 °C) and stable breakdown behavior across temperature. Its unidirectional configuration enables asymmetric surge clamping on DC-biased lines, with VBR min = 6.0 V and VCL max = 10.3 V at IPP = 61 A (10/1000 µs).
Thermal design is supported by validated junction-to-ambient thermal resistance (Rth(j-a) ≈ 120 °C/W on FR4 with recommended footprint) and high peak pulse power capability-up to 470 W at Tj = 175 °C-enabling reliable operation in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 6.0 V - Maximum continuous reverse operating voltage before significant conduction begins. |
| Breakdown Voltage (VBR) | 6.7–7.4 V at IBR = 10 mA - Ensures predictable turn-on during transients without false triggering. |
| Clamping Voltage (VCL) | 10.3 V at IPP = 61 A (10/1000 µs) - Limits downstream circuit voltage during surge events. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 4 kW (8/20 µs) - Supports high-energy surge immunity per IEC 61000-4-4 level 4. |
| Leakage Current (IRM) | ≤0.2 µA at 25 °C, ≤1 µA at 85 °C - Minimizes standby power loss and signal integrity impact. |
| Junction Temperature Range | −55 to +175 °C - Enables deployment in under-hood automotive and industrial control environments. |
| Dynamic Resistance (RD) | 0.048 Ω at 25 °C - Low impedance ensures rapid voltage clamping and minimal overshoot. |
Pinout & Package
The SMB6F6.0A is housed in an SMB Flat surface-mount package (JEDEC MO-213AA), measuring 3.95 mm × 5.60 mm × 1.10 mm with matte tin-plated leads compliant to J-STD-002 and MIL-STD-750 method 2026. The flat profile (1 mm height) supports low-profile PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Surge current sink | Connected to protected line; conducts transient energy to ground during overvoltage events. |
| Anode | Reference node | Typically tied to system ground or lower-potential rail; defines unidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Planar silicon construction | Enables stable VBR over temperature and long-term reliability in high-Tj applications. |
| Low dynamic resistance | 0.048 Ω minimizes clamping voltage rise under high-current surges (e.g., ISO 7637-2 pulses). |
| High-temperature operation | Rated for continuous operation up to 175 °C junction temperature-critical for engine control units and motor drives. |
| IEC 61000-4-2 compliance | Withstands ±30 kV air/contact ESD per 150 pF/330 Ω network-exceeds level 4 requirements. |
| Flat SMB package | 1 mm profile reduces board space and improves thermal coupling to copper pour on FR4 PCBs. |
Applications
| Automotive Power Line Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and ISO 7637-2 transient pulses. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges above 6.0 V. Use Value: Clamps 61 A transients to ≤10.3 V, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shielding PLC digital input modules from field-induced surges on 24 V sensor lines. IC Role / Device Role / Timing Role: Standoff protector on dry-contact or PNP/NPN input circuits with DC bias. Use Value: Sub-1 µA leakage at 85 °C avoids false triggering in high-impedance sensing paths. |
| USB Port ESD Protection | DC-DC Converter Input Filtering |
Use Scenario: Secondary-level ESD protection on VBUS line of USB 2.0 host ports in industrial gateways. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp after primary common-mode choke and fuse. Use Value: Responds within nanoseconds to ±30 kV ESD events while maintaining <0.2 µA leakage at room temperature. | Use Scenario: Input surge suppression for isolated 5 V/12 V DC-DC converters powering safety-critical logic. IC Role / Device Role / Timing Role: Parallel-connected TVS on converter input to absorb coupled lightning surges. Use Value: 470 W peak power rating at 175 °C allows sustained clamping during repeated 8/20 µs transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0A (Bourns) | Same SMB package, but higher VBR (6.67–7.37 V) and VCL (10.5 V @ 60.5 A); RD = 0.052 Ω. | Slightly higher clamping voltage may marginally reduce protection margin for 5 V logic rails. | Select when sourcing flexibility is prioritized and 0.2 V higher VCL is acceptable in system margin analysis. |
| P6SMB6.0A (Littelfuse) | Identical electrical specs (VBR = 6.7–7.4 V, VCL = 10.3 V @ 61 A), same SMB Flat package, but rated for 150 °C max Tj. | Limited to 150 °C operation-unsuitable for under-hood automotive zones requiring 175 °C rating. | Prefer for commercial/industrial designs where ambient temperature stays below 125 °C. |
Compared with SMBJ6.0A and P6SMB6.0A, SMB6F6.0A uniquely combines 175 °C junction rating, 0.048 Ω dynamic resistance, and full IEC 61000-4-2 level 4 compliance-making it optimal for high-reliability automotive and harsh-environment industrial deployments.
Availability
SMB6F6.0A is available at Aetrix Electronics and suitable for automotive power line protection, industrial digital I/O protection, USB port ESD protection, and DC-DC converter input filtering requiring stable component supply across extended temperature ranges.
Supply support for SMB6F6.0A 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.
The SMB6FxxA series belongs to ST's high-reliability TVS portfolio, engineered specifically for demanding surge immunity in automotive electronics and industrial control systems where thermal stability and ESD robustness are critical.
FAQ
What is the maximum clamping voltage of SMB6F6.0A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 10.3 V at a peak pulse current (IPP) of 61 A for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature due to the positive temperature coefficient αT = 5.9 × 10⁻⁴ /°C, reaching ~11.2 V at Tj = 125 °C.
Is SMB6F6.0A suitable for bidirectional surge protection?
No-SMB6F6.0A is a unidirectional TVS diode, intended for DC-biased lines where surge polarity is known (e.g., positive-rail protection). For AC or bipolar signal lines, a bidirectional variant such as SMB6F6.0CA must be used, which has symmetrical clamping in both directions.
How does the SMB Flat package improve thermal performance compared to standard SMB?
The SMB Flat package reduces height to 1.10 mm and optimizes thermal path geometry, achieving ~15% lower Rth(j-a) versus legacy SMB packages when mounted on identical FR4 footprints. Its flat bottom enhances solder joint thermal conduction and supports tighter copper pour integration under the device body.
Does SMB6F6.0A meet automotive qualification standards like AEC-Q101?
Yes-SMB6F6.0A is qualified per AEC-Q101 for stress testing including HTGB, HTRB, and temperature cycling. It also complies with UL94 V0 flammability, J-STD-020 MSL level 1, and IEC 61000-4-2/4-4 level 4, making it suitable for automotive powertrain and body electronics applications.
SMB6F6.0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AA, SMB Flat Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6V
- Voltage - Breakdown (Min):
- 6.7V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 61A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMBflat
SMB6F6.0A FAQ
1.How can I place an order for SMB6F6.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F6.0A 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 SMB6F6.0A reliable?
The price and inventory of SMB6F6.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F6.0A is usually 5 days.
3.What payment methods are accepted for SMB6F6.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F6.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F6.0A?
SMB6F6.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F6.0A 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 SMB6F6.0A?
For technical support, including SMB6F6.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F6.0A requirements.
6.How does Aetrix verify that SMB6F6.0A is sourced from the original manufacturer or authorized distributors?
All SMB6F6.0A 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 SMB6F6.0A meets industry standards.
7.What is the process for return or replacement of SMB6F6.0A?
All SMB6F6.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F6.0A, 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 SMB6F6.0A part is unused and in its original packaging.
Return procedure for SMB6F6.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F6.0A Tags
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