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STMicroelectronics SMB6F100A
- Part No.:
- SMB6F100A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F100A.pdf
- Description:
- TVS DIODE 100VWM 162VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:8,514
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Product details
Overview
SMB6F100A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for surge protection in DC power lines and signal interfaces. It features a standoff voltage (VRM) of 100 V, clamping voltage (VCL) of 162 V at 3.8 A (10/1000 µs), low leakage current (0.2 µA at 25 °C), and operates up to 175 °C junction temperature - ideal for automotive infotainment power rails and industrial I/O protection.
For engineers reviewing the SMB6F100A datasheet, SMB6F100A pinout, SMB6F100A application, or SMB6F100A equivalent, key selection criteria include clamping performance under 10/1000 µs surges, thermal stability at Tj = 175 °C, unidirectional polarity compatibility with DC-biased circuits, and SMB Flat package footprint compliance with IPC7531.
Technical Context
The SMB6F100A uses planar junction technology to achieve low leakage and high-temperature reliability. Its unidirectional configuration enables integration into grounded-cathode DC protection schemes, with dynamic resistance (RD) of 4.68 Ω enabling predictable VCL rise under increasing IPP.
It meets IEC 61000-4-2 Level 4 ESD immunity (±30 kV air/contact) and IEC 61000-4-4 Level 4 surge immunity (±4 kV), validated across its full operating junction temperature range (–55 °C to +175 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 100 V - maximum continuous reverse working voltage before breakdown |
| Breakdown Voltage (VBR) | 111–123 V at 1 mA - ensures reliable triggering above nominal rail voltage |
| Clamping Voltage (VCL) | 162 V at 3.8 A (10/1000 µs) - limits transient overvoltage seen by downstream ICs |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - sustains standard lightning-surge energy without failure |
| Leakage Current (IRM) | 0.2 µA at 25 °C - minimizes standby power loss in battery-backed systems |
| Junction Temperature (Tj) | –55 °C to +175 °C - supports under-hood automotive and industrial ambient conditions |
| Package | SMB Flat (DO-214AA) - 3.3–3.95 mm width, 5.2–5.6 mm length, 1.0 mm height for space-constrained PCBs |
Pinout & Package
SMB6F100A is housed in an SMB Flat (DO-214AA) surface-mount package with cathode band marking. The device has two terminals: anode and cathode, oriented per JEDEC-standard outline and IPC7531 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (unidirectional) | Connected to protected line; conducts surge current toward ground when VAK exceeds VBR |
| Cathode | Reference terminal / surge return path | Connected to system ground; defines polarity and establishes clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| Planar junction construction | Enables stable VBR and low IR drift over 175 °C operation and long-term reliability |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and whisker resistance per JESD-201 Class 2 |
| Flat 1 mm profile | Reduces board-level mechanical stress and enables low-profile enclosure integration |
| IEC 61000-4-2 Level 4 compliance | Guarantees ±30 kV ESD robustness without external shielding in end-equipment certification |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs against load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges within safe limits for PMIC and microcontroller LDOs. Use Value: Clamps to 162 V at 3.8 A, limiting stress on 36 V-rated input stages while surviving 175 °C under-hood temperatures. | Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Front-end protection element on optocoupler or Schmitt-trigger input, absorbing fast transients before signal conditioning. Use Value: Low 0.2 µA leakage preserves input threshold accuracy; 600 W rating handles repetitive 10/1000 µs surges in factory-floor environments. |
| Telecom Power Supply OVP | Medical Diagnostic Equipment Interface |
Use Scenario: Overvoltage protection on secondary-side 48 V DC distribution bus in PoE-powered infrastructure. IC Role / Device Role / Timing Role: Standoff-rated TVS safeguarding DC-DC converters and Ethernet PHYs from cross-talk-induced spikes. Use Value: 100 V VRM aligns with 48 V nominal + 20 % tolerance; 162 V VCL ensures downstream 60 V-rated components remain within SOA. | Use Scenario: ESD hardening of analog sensor interface lines (e.g., ECG front-end) exposed to clinical handling. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor on signal path to preserve bandwidth and avoid signal distortion. Use Value: Junction capacitance <100 pF at 10 V (per curve Fig.7) maintains signal integrity for sub-MHz biopotential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A | Same SMB package, but 1000 W (10/1000 µs) rating and higher VCL (170 V at 5.9 A) | Better suited for higher-energy surges; less optimal where strict clamping headroom is required | Select when surge energy exceeds 600 W but PCB layout allows same footprint |
| 1.5SMC100A | Higher 1500 W rating, DO-214AB package (larger, 4.5 mm height), VCL = 165 V at 9.1 A | Used where thermal mass and peak power margin outweigh board space constraints | Choose for industrial mains-connected equipment needing extended surge endurance |
Compared with SMBJ100A and 1.5SMC100A, SMB6F100A offers tighter clamping (162 V vs. ≥165 V), lower profile (1.0 mm vs. ≥2.2 mm), and optimized leakage (0.2 µA) - making it preferred for space- and thermal-limited DC power rail protection where 600 W surge capacity suffices.
Availability
SMB6F100A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power supplies, and medical sensor interfaces requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMB6F100A 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 silicon solutions for automotive, industrial, and power management applications.
The SMB6FxxA series belongs to ST's high-reliability TVS portfolio, engineered specifically for flat-package surge protection in thermally demanding, space-constrained DC systems where low leakage and precise clamping are critical.
FAQ
What is the maximum clamping voltage of SMB6F100A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 162 V at 3.8 A for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature per the αT coefficient (10.7 × 10⁻⁴/°C), reaching ~175 V at Tj = 125 °C.
Is SMB6F100A suitable for bidirectional signal line protection?
No - SMB6F100A is unidirectional and intended for DC-biased lines with defined polarity (cathode to ground). For AC or bidirectional signal paths, use a bidirectional variant such as SMB6F100CA, which provides symmetrical clamping in both directions.
Does SMB6F100A meet automotive qualification standards?
While not AEC-Q200 qualified itself, SMB6F100A meets key automotive-relevant stress standards: IEC 61000-4-2 Level 4 ESD (±30 kV), ISO 10605 (±30 kV), and operates up to 175 °C junction temperature - enabling use in non-safety-critical automotive subsystems when validated per system-level requirements.
What is the recommended PCB footprint for SMB6F100A?
The manufacturer recommends the IPC7531-compliant SMB Flat footprint: pad length 3.44 mm (0.136"), pad width 1.20 mm (0.047"), center-to-center spacing 5.84 mm (0.230"), with 2.07 mm (0.082") solder mask opening - matching JEDEC DO-214AA outline and ensuring thermal reliability per Figure 13.
SMB6F100A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AA, SMB Flat Leads
- Series:
- SMB6FxxA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- 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
SMB6F100A FAQ
1.How can I place an order for SMB6F100A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F100A 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 SMB6F100A reliable?
The price and inventory of SMB6F100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F100A is usually 5 days.
3.What payment methods are accepted for SMB6F100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F100A?
SMB6F100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F100A 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 SMB6F100A?
For technical support, including SMB6F100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F100A requirements.
6.How does Aetrix verify that SMB6F100A is sourced from the original manufacturer or authorized distributors?
All SMB6F100A 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 SMB6F100A meets industry standards.
7.What is the process for return or replacement of SMB6F100A?
All SMB6F100A units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F100A, 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 SMB6F100A part is unused and in its original packaging.
Return procedure for SMB6F100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F100A Tags
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