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STMicroelectronics SMB6F13A
- Part No.:
- SMB6F13A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F13A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:8,476
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Product details
Overview
SMB6F13A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode in SMB Flat package, designed to protect sensitive electronics against ESD and surge events. It features a standoff voltage (VRM) of 13 V, clamping voltage (VCL) of 21.5 V at 29 A (10/1000 µs), and operates up to 175 °C junction temperature - ideal for automotive power line and industrial I/O port protection.
For engineers reviewing the SMB6F13A datasheet, SMB6F13A pinout, SMB6F13A application, or SMB6F13A 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
The SMB6F13A uses planar junction technology to achieve low leakage current (0.2 µA at 25 °C) and high thermal stability across –55 °C to +175 °C operating range. Its unidirectional configuration enables DC-biased protection without reverse conduction during normal operation.
Clamping behavior is defined by dynamic resistance (RD = 0.190 Ω) and voltage-temperature coefficient (αT = 8.4 × 10⁻⁴ /°C), enabling accurate VCL prediction across temperature and current. Surge capability is validated per IEC 61000-4-4 level 4 (±4 kV) and ISO 10605 (±30 kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 13 V - maximum continuous reverse working voltage before breakdown |
| Breakdown Voltage (VBR) | 14.4–16.0 V at 1 mA - ensures reliable triggering above system operating voltage |
| Clamping Voltage (VCL) | 21.5 V at 29 A (10/1000 µs) - limits transient voltage seen by downstream ICs |
| Peak Pulse Power | 600 W (10/1000 µs), 4 kW (8/20 µs) - supports high-energy surge immunity per IEC standards |
| Leakage Current (IRM) | 0.2 µA at 25 °C, 1 µA at 85 °C - minimizes standby power loss in battery-powered systems |
| Junction Temperature Range | –55 °C to +175 °C - enables use in under-hood automotive and industrial environments |
| Dynamic Resistance (RD) | 0.190 Ω - determines VCL rise slope under surge current, critical for precision clamping |
Pinout & Package
The SMB6F13A 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 with J-STD-002 and IPC7531 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Surge current sink | Connected to protected line; conducts transient energy to ground when VREV > VRM |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for unidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Planar junction construction | Enables stable VBR and low IR over lifetime and temperature, supporting long-term reliability in harsh environments |
| Flat 1 mm profile | Reduces board height and improves airflow in dense layouts; compatible with automated optical inspection (AOI) |
| IEC 61000-4-2 level 4 compliance | Withstands ±30 kV air/contact discharge - eliminates need for external ESD staging in many industrial interfaces |
| MSL Level 1 rating | Allows unlimited floor life and reflow without dry-packaging - simplifies SMT manufacturing logistics |
Applications
| Automotive Power Line Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Primary TVS clamp on power rail input, placed upstream of DC-DC converter. Use Value: Limits peak voltage to ≤21.5 V during 29 A surge, preventing damage to 36 V-rated regulators and microcontrollers. | Use Scenario: 24 V digital input modules receiving signals from field sensors and switches. IC Role / Device Role / Timing Role: Unidirectional surge suppressor on each channel, referenced to common ground. Use Value: Maintains <0.2 µA leakage at 25 °C to avoid false triggering in high-impedance sensing circuits. |
| Telecom Base Station Interface | Medical Diagnostic Equipment Port |
Use Scenario: RS-485 data lines connecting outdoor radio units to indoor controllers. IC Role / Device Role / Timing Role: Secondary protection device after gas discharge tube (GDT), handling residual fast transients. Use Value: Clamps 8/20 µs surges to 27.2 V at 147 A, complementing GDT's high-energy handling with low-voltage precision. | Use Scenario: USB and analog sensor ports in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: ESD safeguard on patient-connected signal paths meeting IEC 60601-1-2 requirements. Use Value: Achieves ±30 kV contact discharge immunity without adding capacitance that degrades signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A (Bourns) | Same SMB package, 600 W rating, but higher VBR (14.4–15.9 V) and VCL (21.5 V @ 29.1 A); RD = 0.195 Ω | Identical placement and footprint; slightly higher clamping tolerance due to wider VBR spread | Preferred where tighter VBR consistency is required; same thermal derating curve |
| P6SMB13A (Littelfuse) | Same SMB package, 600 W rating, but lower max leakage (0.1 µA at 25 °C); VCL = 21.2 V @ 29.2 A; RD = 0.185 Ω | Lower leakage benefits ultra-low-power medical monitoring; identical surge ratings | Choose when sub-0.2 µA leakage is mandatory at room temperature |
Compared with SMBJ13A and P6SMB13A, the SMB6F13A offers superior high-temperature leakage performance (1 µA at 85 °C vs ≥2 µA), making it optimal for under-hood automotive and thermally constrained industrial enclosures.
Availability
SMB6F13A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O hardening, and medical device ESD shielding requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SMB6F13A 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 capabilities.
The SMB6FxxA series belongs to ST's high-reliability TVS portfolio, engineered specifically for robust surge immunity in automotive and industrial control systems where thermal stability and long-term leakage control are critical.
FAQ
What is the maximum clamping voltage of SMB6F13A under an 8/20 µs surge?
The SMB6F13A clamps to 27.2 V at 147 A under an 8/20 µs waveform, as specified in Table 2 of DS12898 Rev 2. This value reflects worst-case VCL at rated peak current and is validated per IEC 61000-4-4 level 4 testing conditions.
Can SMB6F13A be used in bidirectional signal lines?
No - SMB6F13A is unidirectional and must be installed with cathode toward the protected line. For bidirectional protection (e.g., USB, RS-485), a symmetric TVS like SMB6F13AT (A = unidirectional, T = bidirectional) or dual-diode array is required.
Does SMB6F13A require derating at elevated ambient temperatures?
Yes - its peak pulse power drops from 600 W at 25 °C to 470 W at Tj = 175 °C (Figure 3). Designers must calculate actual junction temperature using Rth(j-a) (≈120 °C/W on standard FR4) and apply thermal copper pour to maintain safe margins.
Is SMB6F13A RoHS and REACH compliant?
Yes - it carries ST's ECOPACK®2 designation, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Matte tin plating and halogen-free molding compound are confirmed in the official ECOPACK® documentation on st.com.
SMB6F13A 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):
- 13V (Max)
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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
SMB6F13A FAQ
1.How can I place an order for SMB6F13A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F13A 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 SMB6F13A reliable?
The price and inventory of SMB6F13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F13A is usually 5 days.
3.What payment methods are accepted for SMB6F13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F13A?
SMB6F13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F13A 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 SMB6F13A?
For technical support, including SMB6F13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F13A requirements.
6.How does Aetrix verify that SMB6F13A is sourced from the original manufacturer or authorized distributors?
All SMB6F13A 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 SMB6F13A meets industry standards.
7.What is the process for return or replacement of SMB6F13A?
All SMB6F13A units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F13A, 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 SMB6F13A part is unused and in its original packaging.
Return procedure for SMB6F13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F13A Tags
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