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STMicroelectronics SMB6F16A
- Part No.:
- SMB6F16A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F16A.pdf
- Description:
- TVS DIODE 16VWM 26VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:3,897
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Product details
Overview
SMB6F16A 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 standoff voltage (VRM) of 16 V, clamping voltage (VCL) of 26 V at 23.1 A (10/1000 µs), and low leakage current (0.2 µA at 25 °C), enabling reliable overvoltage protection in power supply input stages and industrial I/O interfaces.
For engineers reviewing the SMB6F16A datasheet, SMB6F16A pinout, SMB6F16A application, or SMB6F16A equivalent, key selection criteria include its 175 °C maximum junction temperature, 9.0 × 10⁻⁴ /°C voltage temperature coefficient, dynamic resistance of 0.268 Ω, and compliance with IEC 61000-4-2 level 4 (±30 kV ESD) and IEC 61000-4-4 level 4 (±4 kV EFT).
Technical Context
The SMB6F16A employs planar silicon technology to achieve low leakage and high thermal stability across −55 °C to +175 °C operating junction range. Its unidirectional configuration provides asymmetric clamping-forward conduction only during positive transients-making it suitable for DC-biased lines like 12 V/24 V power rails and sensor supply inputs.
Electrical behavior is defined by three core parameters: breakdown voltage (VBR = 17.9–19.8 V at 1 mA), clamping voltage (VCL = 26 V max at IPP = 23.1 A, 10/1000 µs), and dynamic resistance (RD = 0.268 Ω), which jointly determine energy absorption linearity and voltage overshoot under surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 600 W - sustains 23.1 A surge at 26 V clamping without failure |
| Standoff Voltage (VRM) | 16 V - maximum continuous reverse voltage before breakdown begins |
| Breakdown Voltage (VBR) | 17.9–19.8 V at 1 mA - precise threshold for initiating clamping action |
| Clamping Voltage (VCL) | 26 V at 23.1 A - limits downstream voltage stress during surge events |
| Leakage Current (IRM) | 0.2 µA at 25 °C - negligible standby power loss in battery-powered systems |
| Junction Temperature Range | −55 to +175 °C - supports operation in automotive engine bays and industrial enclosures |
| Dynamic Resistance (RD) | 0.268 Ω - determines voltage rise per ampere of surge current (ΔV = RD × ΔI) |
Pinout & Package
Package: SMB Flat (JEDEC DO-214AA), 3.3–3.95 mm length × 5.2–5.6 mm width × 0.9–1.1 mm height, matte tin-plated leads, IPC7531-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Surge Current Sink | Connected to protected line; conducts transient energy to ground when voltage exceeds VBR |
| Anode | Reference / Ground Return | Typically tied to system ground or low-impedance return path for clamping loop closure |
Key Features
| Feature | Design Value |
|---|---|
| High-Temperature Reliability | Rated for continuous operation up to 175 °C junction temperature-enables placement near heat sources without derating |
| Low-Leakage Planar Construction | 0.2 µA IR at 25 °C ensures minimal loading on high-impedance sensor outputs and battery-backed circuits |
| ESD/EFT Compliance | Exceeds IEC 61000-4-2 level 4 (±30 kV air/contact discharge) and IEC 61000-4-4 level 4 (±4 kV) |
| Flat, Low-Profile Package | 1.0 mm max height enables use in space-constrained PCB layouts and automated optical inspection (AOI) |
| Robust Solderability | MSL Level 1, J-STD-002 compliant matte tin plating ensures reliable reflow soldering without voiding or dewetting |
Applications
| Industrial PLC Digital Input | Automotive Body Control Module (BCM) Power Rail |
|---|---|
|
Use Scenario: Protects 24 V DC digital input channels from inductive switching spikes and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between field input and optocoupler/signal conditioner input. Use Value: Clamps surges to ≤26 V, preventing damage to 3.3 V/5 V logic interface ICs while maintaining <0.2 µA leakage at ambient temperature. |
Use Scenario: Shields 12 V power distribution network in BCM against ISO 7637-2 pulse 1/2/5a and ESD events. IC Role / Device Role / Timing Role: Primary surge suppressor on main VBAT feed, upstream of DC-DC converters and microcontrollers. Use Value: Withstands 600 W peak pulses and operates reliably at 175 °C junction temperature inside sealed automotive enclosures. |
| Smart Meter Power Supply Input | IoT Gateway Ethernet PHY Protection |
|
Use Scenario: Guards AC/DC adapter output stage against lightning-induced surges on utility-side mains connections. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV, providing fast-response clamping for low-energy but high-dV/dt transients. Use Value: 26 V clamping voltage ensures downstream LDOs and metering ICs remain within absolute maximum ratings during 10/1000 µs surges. |
Use Scenario: Protects RJ45 magnetics secondary side and PHY transceiver pins from ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS on 3.3 V bias rail feeding Ethernet magnetics center tap. Use Value: 0.268 Ω dynamic resistance minimizes clamping voltage overshoot during fast 8/20 µs surges, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A (Bourns) | Same SMB package, 600 W rating, but higher VBR (17.8–19.7 V) and VCL (25.6 V); RD = 0.25 Ω | Marginally tighter VBR tolerance; identical thermal and surge capability | Drop-in replacement where Bourns qualification is required; verify layout compatibility with marking orientation |
| 1.5SMC16A (ON Semiconductor) | Higher package profile (DO-214AB, 2.3 mm height), same VRM/VBR/VCL specs, but lower Tj max (150 °C) | Not suitable for high-temperature environments (>150 °C ambient) | Select only if board height allows larger package and thermal environment is ≤125 °C ambient |
Compared with SMBJ16A and 1.5SMC16A, SMB6F16A offers superior high-temperature operation (175 °C vs. 150 °C), lower profile (1.0 mm vs. 2.3 mm), and tighter leakage control (0.2 µA vs. typical 1 µA), making it optimal for thermally demanding, space-constrained industrial and automotive designs.
Availability
SMB6F16A is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, smart meter power supplies, and IoT gateway Ethernet PHY protection requiring stable component supply and long-term lifecycle support.
Supply support for SMB6F16A 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 power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The SMB6FxxA series belongs to ST's high-reliability TVS portfolio, engineered specifically for robust surge immunity in harsh-environment applications where extended temperature operation and ultra-low leakage are critical design requirements.
FAQ
What is the maximum clamping voltage of SMB6F16A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) of SMB6F16A is 26 V when subjected to a 10/1000 µs surge current of 23.1 A, measured at 25 °C ambient. This value increases with junction temperature at a rate defined by αT = 9.0 × 10⁻⁴ /°C, reaching approximately 28.3 V at 125 °C junction temperature.
Can SMB6F16A be used in bidirectional signal lines?
No-SMB6F16A is a unidirectional TVS diode, meaning it clamps only positive transients relative to its cathode. For bidirectional protection (e.g., RS-485, USB D+/D−), a bidirectional variant such as SMB6F16CA must be selected, as SMB6F16A will conduct continuously if reverse-biased beyond its 16 V standoff voltage.
How does SMB6F16A compare to SMAJ16A in terms of thermal performance?
SMB6F16A supports a maximum junction temperature of 175 °C and uses planar construction for improved thermal stability, whereas SMAJ16A (SMA package) is rated for 150 °C and exhibits higher thermal resistance due to smaller die attach area. SMB6F16A's flat SMB package also delivers lower RθJA (≈120 °C/W on standard FR4) versus SMAJ16A (≈150 °C/W), enhancing power dissipation margin.
Is SMB6F16A RoHS and REACH compliant?
Yes-SMB6F16A is manufactured in STMicroelectronics' ECOPACK®-compliant facilities and meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. It carries matte tin lead finish, is halogen-free, and conforms to J-STD-020 MSL Level 1 for moisture sensitivity.
SMB6F16A 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):
- 16V (Max)
- Voltage - Breakdown (Min):
- 17.9V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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
SMB6F16A FAQ
1.How can I place an order for SMB6F16A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F16A 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 SMB6F16A reliable?
The price and inventory of SMB6F16A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F16A is usually 5 days.
3.What payment methods are accepted for SMB6F16A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F16A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F16A?
SMB6F16A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F16A 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 SMB6F16A?
For technical support, including SMB6F16A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F16A requirements.
6.How does Aetrix verify that SMB6F16A is sourced from the original manufacturer or authorized distributors?
All SMB6F16A 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 SMB6F16A meets industry standards.
7.What is the process for return or replacement of SMB6F16A?
All SMB6F16A units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F16A, 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 SMB6F16A part is unused and in its original packaging.
Return procedure for SMB6F16A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F16A Tags
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