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STMicroelectronics SMA6F30A
- Part No.:
- SMA6F30A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F30A.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:8,235
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Product details
Overview
SMA6F30A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 30 V stand-off voltage (VRM), 35 V minimum breakdown voltage (VBR), 48.4 V maximum clamping voltage (VCL) at 13 A IPP (10/1000 µs), and operates up to 175 °C junction temperature - deployed in automotive body control modules, industrial PLC I/O protection, and telecom power supply inputs.
For engineers reviewing the SMA6F30A datasheet, SMA6F30A pinout, SMA6F30A application, or SMA6F30A equivalent, key selection criteria include clamping performance under 10/1000 µs surges, low leakage (<0.2 µA @ 25 °C), high-temperature reliability (Tj = 175 °C), and compliance with IEC 61000-4-2 Level 4 (±25 kV contact / ±30 kV air discharge).
Technical Context
The SMA6F30A uses planar silicon avalanche technology to deliver precise, repeatable clamping during fast transients. Its unidirectional configuration enables integration on positive-rail-only paths without reverse-bias concerns, and its low dynamic resistance (0.442 Ω) ensures minimal voltage overshoot under high peak currents.
Thermal design is supported by a 175 °C max junction rating and validated thermal impedance curves (Zth(j-a)) for FR4 PCBs with standard copper footprints. The device meets J-STD-020 MSL Level 1 and passes JEDEC JESD22-B102 E3 solderability testing, confirming suitability for lead-free reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 30 V - Maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 33.2–36.8 V @ 1 mA - Confirmed avalanche onset range ensuring predictable turn-on during overvoltage events |
| Clamping Voltage (VCL) | 48.4 V @ 13 A (10/1000 µs) - Limits downstream circuit stress to safe levels during 600 W surge conditions |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 4 kW (8/20 µs) - Supports both long-duration lightning-induced surges and fast ESD pulses |
| Leakage Current (IRM) | 0.2 µA @ 25 °C, 1 µA @ 85 °C - Enables low-power system standby integrity without excessive quiescent loss |
| Junction Temperature Range | −55 °C to +175 °C - Allows deployment in under-hood automotive, industrial motor drives, and outdoor telecom enclosures |
| ESD Robustness | ±25 kV contact / ±30 kV air (IEC 61000-4-2 Level 4) - Exceeds automotive and industrial immunity requirements |
Pinout & Package
The SMA6F30A is housed in an industry-standard SMA (DO-214AC) flat package with two terminals: Cathode (marked band) and Anode. The package measures 4.60 mm × 2.90 mm × 2.25 mm (L × W × H) and features matte tin-plated leads compatible with IPC-7531 footprint guidelines.
| 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 | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use up to 175 °C junction temperature - eliminates derating in thermally constrained environments |
| Low dynamic resistance | 0.442 Ω - Minimizes VCL rise under high IPP, improving protection margin for 3.3 V/5 V logic interfaces |
| Ultra-low leakage | 0.2 µA @ 25 °C - Preserves battery life and avoids false triggering in high-impedance sensor circuits |
| IEC 61000-4-2 Level 4 compliance | ±25 kV contact / ±30 kV air - Meets stringent ESD immunity for automotive infotainment and industrial HMI ports |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V CAN/LIN bus power rails and switch inputs against load dump and ESD events in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between fused 12 V supply and microcontroller GPIO or transceiver VCC pins. Use Value: Clamps transients to ≤48.4 V within 1 ns, preventing latch-up or permanent damage to 3.3 V/5 V automotive MCUs operating at Tj = 150 °C. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controller (PLC) I/O cards exposed to field wiring surges and induced noise. IC Role / Device Role / Timing Role: Primary surge clamp on each optocoupler input side, mounted directly at terminal block entry points. Use Value: Withstands repeated 1 kV/500 A surge tests per IEC 61000-4-5 while maintaining <1 µA leakage at 85 °C ambient - ensuring long-term channel accuracy. |
| Telecom Power Supply Input | Smart Meter AC/DC Converter Stage |
Use Scenario: Secondary-side overvoltage protection on 48 V telecom rectifier outputs feeding PoE injectors and base station backhaul equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS across output capacitor bank to suppress switching spikes and lightning-induced surges. Use Value: Delivers 600 W (10/1000 µs) clamping capability with 48.4 V VCL - keeps downstream DC-DC converters within absolute maximum ratings during grid-coupled transients. | Use Scenario: Surge suppression on the DC bus of isolated flyback converters powering metrology SoCs and RF modules in ANSI C12.19-compliant smart meters. IC Role / Device Role / Timing Role: Unidirectional TVS placed after bridge rectifier and bulk capacitor to absorb residual line surges entering via AC mains. Use Value: Operates reliably at 175 °C junction temperature inside sealed meter enclosures, with <0.2 µA leakage preserving low-power sleep mode integrity over 20-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same SMA package, but rated for 400 W (10/1000 µs); higher VCL (53.3 V @ 7.5 A) | Lower power handling limits use in high-energy surge environments like industrial motor drives | Select when cost sensitivity outweighs need for 600 W headroom and tighter clamping |
| 1.5SMC33A | Higher power (1500 W), larger SMC (DO-214AB) package; VCL = 53.3 V @ 28.3 A | Requires more PCB area and different footprint; better suited for primary-side AC input protection | Choose for legacy designs already using SMC layout or where 1.5 kW surge margin is mandatory |
Compared with SMAJ30A and 1.5SMC33A, the SMA6F30A uniquely balances 600 W surge capacity, ultra-low leakage, and compact SMA footprint - making it optimal for space-constrained, high-reliability DC rail protection where thermal and ESD margins are critical.
Availability
SMA6F30A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power supply design requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMA6F30A 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 discrete solutions with vertical manufacturing and broad IP portfolio.
The SMA6F series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-reliability transient suppression in harsh-temperature and high-surge environments - targeting automotive, industrial automation, and infrastructure applications.
FAQ
What is the maximum clamping voltage of SMA6F30A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 48.4 V at 13 A peak pulse current (IPP) for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature per the αT coefficient (9.9 × 10⁻⁴ /°C), reaching ~53.2 V at Tj = 125 °C.
Can SMA6F30A be used in bidirectional signal line protection?
No - SMA6F30A is a unidirectional TVS diode intended for DC power rail or single-polarity signal protection. For bidirectional applications such as USB or RS-485 data lines, ST recommends the SMA6F30CA variant, which provides symmetrical clamping for both polarities.
Does SMA6F30A meet automotive qualification standards?
While not AEC-Q200 qualified out-of-the-box, SMA6F30A complies with key automotive-relevant standards including IEC 61000-4-2 Level 4 ESD, J-STD-020 MSL Level 1, and UL94 V0 flammability. Customers may qualify it for specific automotive applications per internal stress test protocols.
What is the recommended PCB footprint for SMA6F30A?
The manufacturer specifies an IPC-7531-compliant footprint for the SMA (DO-214AC) package: pad length ≥3.9 mm, pad width ≥1.5 mm, center-to-center spacing 4.0 mm, with ≥1.0 cm² total copper area per lead to maintain thermal performance and achieve rated 600 W pulse power at Tj = 175 °C.
SMA6F30A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA6F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.2V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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:
- SMAflat
SMA6F30A FAQ
1.How can I place an order for SMA6F30A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F30A 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 SMA6F30A reliable?
The price and inventory of SMA6F30A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F30A is usually 5 days.
3.What payment methods are accepted for SMA6F30A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F30A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F30A?
SMA6F30A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F30A 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 SMA6F30A?
For technical support, including SMA6F30A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F30A requirements.
6.How does Aetrix verify that SMA6F30A is sourced from the original manufacturer or authorized distributors?
All SMA6F30A 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 SMA6F30A meets industry standards.
7.What is the process for return or replacement of SMA6F30A?
All SMA6F30A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F30A, 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 SMA6F30A part is unused and in its original packaging.
Return procedure for SMA6F30A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F30A Tags
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