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STMicroelectronics SMB6F5.0A
- Part No.:
- SMB6F5.0A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F5.0A.pdf
- Description:
- TVS DIODE 5VWM 9.2VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,116
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Product details
Overview
SMB6F5.0A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for primary-level surge protection in low-voltage DC power rails and signal lines. It features a 5.0 V stand-off voltage (VRM), 6.4 V minimum breakdown voltage (VBR), 9.2 V clamping voltage (VCL) at 68 A peak pulse current (IPP), and operates up to 175 °C junction temperature.
For engineers reviewing the SMB6F5.0A datasheet, SMB6F5.0A pinout, SMB6F5.0A application, or SMB6F5.0A equivalent, key selection criteria include clamping performance under IEC 61000-4-2/4-4 stress, low leakage (<0.2 µA @ 25 °C), flat SMB package thermal robustness, and compatibility with high-reliability automotive and industrial power supply inputs.
Technical Context
This TVS diode uses planar silicon technology to achieve stable VBR over temperature (αT = 5.7 × 10⁻⁴ /°C) and low dynamic resistance (RD = 0.031 Ω), enabling precise clamping during fast transients. Its unidirectional configuration supports DC-biased circuits where reverse polarity is not expected.
The device meets IEC 61000-4-2 level 4 ESD immunity (±30 kV air/contact discharge) and IEC 61000-4-4 level 4 surge immunity (±4 kV), with validated performance across -55 °C to +175 °C operating junction range and 1 mm profile optimized for space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 5.0 V - Maximum continuous reverse working voltage before conduction begins |
| Breakdown Voltage (VBR) | 6.4 V min @ 1 mA - Ensures reliable turn-on before downstream IC damage thresholds |
| Clamping Voltage (VCL) | 9.2 V @ 68 A (10/1000 µs) - Limits transient voltage seen by protected circuitry |
| Peak Pulse Power | 600 W @ 10/1000 µs - Sustains high-energy surges without failure at 25 °C ambient |
| Leakage Current (IRM) | 0.2 µA @ 25 °C - Minimizes standby power loss in battery-powered systems |
| Junction Temperature Range | -55 °C to +175 °C - Enables deployment in under-hood automotive and industrial environments |
| Package | SMB Flat (DO-214AA) - 1 mm height, IPC7531-compliant footprint for automated assembly |
Pinout & Package
SMB6F5.0A is housed in an SMB Flat (DO-214AA) surface-mount package with 2 terminals: cathode (marked band) and anode. The 1 mm profile enables stacking in tight board spaces while maintaining thermal performance via copper pad exposure per JEDEC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts transient energy to ground when V > VBR |
| Anode | Reference node | Tied to system ground or lowest potential reference point in unidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping ratio (VCL/VBR ≈ 1.44) | Minimizes overvoltage stress on downstream 5 V logic and interface ICs |
| High surge capability at elevated Tj | Delivers 470 W (10/1000 µs) at 175 °C - critical for engine control units and motor drives |
| Matte tin lead finish | Complies with J-STD-002, JESD 22-B102 E3, and MIL-STD-750 method 2026 - ensures solder joint reliability |
| IEC 61000-4-2/4-4 certified | Validated to ±30 kV contact/air discharge and ±4 kV surge - reduces system-level EMC test risk |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery rail in body control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of LDOs and microcontrollers to limit transient voltage to <9.2 V. Use Value: Prevents latch-up and gate oxide damage in 5 V domain ICs during 100 V/50 ms load dump events. | Use Scenario: 24 V digital input channels in programmable logic controllers subjected to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, shunting surges before signal conditioning circuitry. Use Value: Maintains signal integrity and prevents false triggering during ±30 kV ESD events per IEC 61000-4-2. |
| USB Type-C VBUS Line Protection | Smart Meter Power Supply Input |
Use Scenario: VBUS line (5 V nominal) in USB-C receptacles facing hot-plug and cable-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between connector and USB PD controller to clamp overshoot during plug insertion. Use Value: Limits VBUS to ≤9.2 V during 8/20 µs surges, protecting 5 V tolerant PHY and power path switches. | Use Scenario: AC/DC converter primary-side DC bus in utility smart meters installed in electrically noisy substations. IC Role / Device Role / Timing Role: Secondary-level surge protector after MOV, absorbing residual 10/1000 µs energy that bypasses front-end filtering. Use Value: Extends service life by preventing cumulative degradation of 5 V regulator ICs under repeated lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A (Bourns) | Same SMB package, 600 W rating, but higher VBR (6.7 V min) and VCL (9.6 V @ 65 A) | Marginally higher clamping voltage reduces protection margin for 5 V logic with tight VIH/VIL windows | Select if higher surge repetition tolerance is required; verify VCL compliance with downstream IC absolute max ratings |
| 1.5SMC5.0A (ON Semiconductor) | Higher 1500 W rating in larger SMC package (2.6 mm height), same VRM/VBR specs | Not suitable for ultra-low-profile designs; better thermal mass for repetitive surge duty cycles | Choose when board height >1 mm is acceptable and long-term surge endurance outweighs space constraints |
Compared with SMBJ5.0A and 1.5SMC5.0A, SMB6F5.0A offers the lowest profile (1 mm) and tightest VCL (9.2 V), making it optimal for space-limited 5 V systems where clamping precision and thermal resilience at 175 °C are prioritized over raw power rating.
Availability
SMB6F5.0A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, USB-C power delivery interfaces, and smart meter power supplies requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMB6F5.0A 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, designing and manufacturing analog, MCU, power, and sensing solutions for automotive, industrial, and consumer markets.
The SMB6FxxA series belongs to ST's high-reliability TVS portfolio, engineered specifically for demanding surge environments where low leakage, high Tj operation, and planar stability are essential - such as under-hood automotive ECUs and factory automation controllers.
FAQ
What is the maximum clamping voltage of SMB6F5.0A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 9.2 V at 68 A peak pulse current for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 5.7 × 10⁻⁴ /°C, reaching ~10.1 V at 125 °C junction.
Can SMB6F5.0A be used in bidirectional signal line protection?
No - SMB6F5.0A is unidirectional and must be used only in DC-biased applications where reverse polarity is not expected. For bidirectional protection (e.g., RS-485, CAN), use the SMB6F5.0CA variant or a dedicated bidirectional TVS like SMBJ5.0CA.
Does SMB6F5.0A meet automotive AEC-Q200 requirements?
While SMB6F5.0A is qualified to J-STD-020 MSL Level 1 and operates up to 175 °C junction temperature, it is not explicitly AEC-Q200 qualified. For automotive-grade qualification, ST recommends the AEC-Q200-compliant SMAJ5.0A or SMCJ5.0A series with full stress test documentation.
How does the flat SMB package improve thermal performance compared to standard SMB?
The SMB Flat (DO-214AA) package reduces height to 1.1 mm max and exposes more die surface area to the PCB copper, lowering thermal impedance. At 1 cm² copper per lead, Rth(j-a) is 120 °C/W - 25% lower than standard SMB - enabling sustained 470 W surge handling at 175 °C junction temperature.
SMB6F5.0A 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):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 68A
- 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
SMB6F5.0A FAQ
1.How can I place an order for SMB6F5.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F5.0A 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 SMB6F5.0A reliable?
The price and inventory of SMB6F5.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F5.0A is usually 5 days.
3.What payment methods are accepted for SMB6F5.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F5.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F5.0A?
SMB6F5.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F5.0A 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 SMB6F5.0A?
For technical support, including SMB6F5.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F5.0A requirements.
6.How does Aetrix verify that SMB6F5.0A is sourced from the original manufacturer or authorized distributors?
All SMB6F5.0A 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 SMB6F5.0A meets industry standards.
7.What is the process for return or replacement of SMB6F5.0A?
All SMB6F5.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F5.0A, 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 SMB6F5.0A part is unused and in its original packaging.
Return procedure for SMB6F5.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F5.0A Tags
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